Subject: Re: [Healeys] DW overdrive piston

From: Bob Spidell <[email-masked]>
Date: Wed, 3 Aug 2022 18:56:33 -0700

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The rings will score the inside of the piston housing, though not badly 
(photo at 205K miles). Looks like there's a side load on the piston, 
probably from the spring.

I donated this accumulator to another owner; never heard how they 
worked. Moss shows the rings available (but who knows?).

On 8/3/2022 12:36 PM, Henry G Leach via Healeys wrote:
> I assemble ODs using the original metal rings and have not had any 
> issues with pressure or engagement/disengagement.
>
> When Mr. DeNormanville stayed up in the middle of the night to 
> engineer the operation of the unit,  I think he decided that the use 
> of softer rings (sacrificial metal) against a hardened casing was the 
> best solution for control and wear.  If a rubber o-ring was a better 
> solution, he would have used one with the proper buna rating.
>
> I think the bigger problem, now-a-days, is the availability of the 
> metal piston rings.  Rubber O rings are a dime-a-dozen. If you contact 
> Overdrive Spares in the UK, they should be able to supply the proper 
> rings.  If they too, have decided to go with rubber, then plan on a 
> breakdown/rebuild in a shorter period of time than units equipped with 
> the original parts that last a long, long time. Hank
>
> -----------------------------------------
>
> From: "Michael Salter"
> To: "[email-masked]"
> Cc:
> Sent: Wednesday August 3 2022 9:38:15AM
> Subject: Re: [Healeys] DW overdrive piston
>
> I have a question about the "O" ring type of accumulator.
> The way the accumulator works is that when it is fully charged the 
> piston moves against the spring until the rings reach the radial holes 
> in the wall of the housing which acts to relieve any excess pressure.
> My concern is that at 3 - 400 p.s.i. oil will obviously get behind the 
> "O" ring and force the material of the "O" ring into those radial 
> holes and then, as the piston moves back over them, a piece of the 
> ring will shear off.
> I'm guessing that Laycock-DeNormanville used the complex cast iron 
> rings rather than "O" rings because they recognized the possibility of 
> this happening.
> I'm sure that tiny pieces of the "O" ring would be found in the filter 
> if this was a problem. Anyone found them or noticed damage to their 
> accumulator "O" ring upon disassembly?
>
> M
>
>
> On Wed, Aug 3, 2022 at 9:08 AM Bob Spidell <[email-masked]> wrote:
>
>     I put one in my BJ8's O/D. It's subjective*--O/Ds seem to work a
>     little
>     quicker with cold, thick oil than hot oil--but it cuts maybe a
>     third off
>     engagement time on average. I had the O/D on the bench and
>     disassembled,
>     and the current one had a scored barrel so, why not? Engagement isn't
>     much, if any, harsher than before which, I believe is the reason DMH
>     wanted the weaker, smaller spring. If I'd known about it, I might have
>     bought AHSpares' with an O-ring instead.
>
>     * I've never really 'timed' O/D functioning, it would be a bit
>     awkward;
>     anyone done it? I usually tap the clutch pedal when engaging O/D, and
>     give a little throttle when disengaging. I thought mine engaged a
>     little
>     quicker when I switched to synthetic fluid from engine oil, but in all
>     cases confirmation bias may be involved.
>
>
>
>     On 8/2/2022 8:09 PM, Joseph Costa wrote:
>     > Has anyone installed their upgraded overdrive piston?  If so, is it
>     > worth the trouble ?
>     >
>     > Joe
>     > BN1 #923
>     >
>

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    The rings will score the inside of the piston housing, though not
    badly (photo at 205K miles). Looks like there's a side load on the
    piston, probably from the spring.<br>
    <br>
    I donated this accumulator to another owner; never heard how they
    worked. Moss shows the rings available (but who knows?).<br>
    <br>
    <br>
    <div class="moz-cite-prefix">On 8/3/2022 12:36 PM, Henry G Leach via
      Healeys wrote:<br>
    </div>
    <blockquote type="cite"
      cite="mid:519f18752779101056fc889c22a7b3fe696ee5a5@webmail">
      <meta http-equiv="content-type" content="text/html; charset=UTF-8">
      I assemble ODs using the original metal rings and have not had any
      issues with pressure or engagement/disengagement.
      <div><br>
      </div>
      <div>When Mr. DeNormanville stayed up in the middle of the night
        to engineer the operation of the unit,  I think he decided that
        the use of softer rings (sacrificial metal) against a hardened
        casing was the best solution for control and wear.  If a rubber
        o-ring was a better solution, he would have used one with the
        proper buna rating.</div>
      <div><br>
      </div>
      <div>I think the bigger problem, now-a-days, is the availability
        of the metal piston rings.  Rubber O rings are a dime-a-dozen. 
        If you contact Overdrive Spares in the UK, they should be able
        to supply the proper rings.  If they too, have decided to go
        with rubber, then plan on a breakdown/rebuild in a shorter
        period of time than units equipped with the original parts that
        last a long, long time. Hank<br>
        <br>
        <p>-----------------------------------------</p>
        From: "Michael Salter" <[email-masked]><br>
          To: <a class="moz-txt-link-rfc2396E" href="mailto:[email-masked]">"[email-masked]"</a><br>
          Cc: <br>
          Sent: Wednesday August 3 2022 9:38:15AM<br>
          Subject: Re: [Healeys] DW overdrive piston<br>
          <br>
          <div dir="ltr">
            <div class="gmail_default" style="font-family:arial,
              sans-serif;font-size:small;">I have a question
              about the "O" ring type of accumulator.</div>
            <div class="gmail_default" style="font-family:arial,
              sans-serif;font-size:small;">The way the
              accumulator works is that when it is fully charged the
              piston moves
              against the spring until the rings reach the radial holes
              in the
              wall of the housing which acts to relieve any excess
              pressure.</div>
            <div class="gmail_default" style="font-family:arial,
              sans-serif;font-size:small;">My concern is that
              at 3 - 400 p.s.i. oil will obviously get behind the "O"
              ring and
              force the material of the "O" ring into those radial holes
              and
              then, as the piston moves back over them, a piece of the
              ring will
              shear off.</div>
            <div class="gmail_default" style="font-family:arial,
              sans-serif;font-size:small;">I'm guessing that
              Laycock-DeNormanville used the complex cast iron rings
              rather than
              "O" rings because they recognized the possibility of this
              happening.<br>
            </div>
            <div class="gmail_default" style="font-family:arial,
              sans-serif;font-size:small;">I'm sure that tiny
              pieces of the "O" ring would be found in the filter if
              this was a
              problem. Anyone found them or noticed damage to their
              accumulator
              "O" ring upon disassembly?<br>
            </div>
            <div class="gmail_default" style="font-family:arial,
              sans-serif;font-size:small;"><br>
            </div>
            <div class="gmail_default" style="font-family:arial,
              sans-serif;font-size:small;">M<br>
            </div>
            <div class="gmail_default" style="font-family:arial,
              sans-serif;font-size:small;"><br>
            </div>
          </div>
          <br>
          <div class="gmail_quote">
            <div dir="ltr" class="gmail_attr">On Wed, Aug 3, 2022 at
              9:08 AM
              Bob Spidell &lt;<a moz-do-not-send="true">[email-masked]</a>&gt;
              wrote:<br>
            </div>
            <blockquote class="gmail_quote" style="margin:0px 0px 0px
              .8ex;border-left:1px solid
              rgb(204,204,204);padding-left:1ex;">
              I put one in my BJ8's O/D. It's subjective*--O/Ds seem to
              work a
              little<br>
              quicker with cold, thick oil than hot oil--but it cuts
              maybe a
              third off<br>
              engagement time on average. I had the O/D on the bench and
              disassembled,<br>
              and the current one had a scored barrel so, why not?
              Engagement
              isn't<br>
              much, if any, harsher than before which, I believe is the
              reason
              DMH<br>
              wanted the weaker, smaller spring. If I'd known about it,
              I might
              have<br>
              bought AHSpares' with an O-ring instead.<br>
              <br>
              * I've never really 'timed' O/D functioning, it would be a
              bit
              awkward;<br>
              anyone done it? I usually tap the clutch pedal when
              engaging O/D,
              and<br>
              give a little throttle when disengaging. I thought mine
              engaged a
              little<br>
              quicker when I switched to synthetic fluid from engine
              oil, but in
              all<br>
              cases confirmation bias may be involved.<br>
              <br>
              <br>
              <br>
              On 8/2/2022 8:09 PM, Joseph Costa wrote:<br>
              &gt; Has anyone installed their upgraded overdrive
              piston?  If
              so, is it<br>
              &gt; worth the trouble ?<br>
              &gt;<br>
              &gt; Joe<br>
              &gt; BN1 #923<br>
              &gt;<br>
              <br>
            </blockquote>
          </div>
        </[email-masked]></div>
    </blockquote>
    <br>
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_______________________________________________

Archive: http://www.team.net/pipermail/healeys http://autox.team.net/archive/healeys

[email-masked]
http://autox.team.net/mailman/listinfo/healeys

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---

From: Warren Dietz via Healeys <[email-masked]>
Date: Thu, 4 Aug 2022 06:36:16 -0400

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//www.w3.org/TR/REC-html40"><head><meta http-equiv=3DContent-Type content=
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--></style></head><body lang=3DEN-US link=3Dblue vlink=3D"#954F72" style=3D=
'word-wrap:break-word'><div class=3DWordSection1><p class=3DMsoNormal><img =
width=3D683 height=3D513 style=3D'width:7.118in;height:5.3402in' id=3D"Pict=
ure_x0020_3" src=3D"cid:[email-masked]"><img width=3D683 he=
ight=3D513 style=3D'width:7.118in;height:5.3402in' id=3D"Picture_x0020_4" s=
rc=3D"cid:[email-masked]"></p><p class=3DMsoNormal><o:p>&nb=
sp;</o:p></p><p class=3DMsoNormal>Sent from <a href=3D"https://go.microsoft=
.com/fwlink/?LinkId=3D550986">Mail</a> for Windows</p><p class=3DMsoNormal>=
<o:p>&nbsp;</o:p></p><p class=3DMsoNormal>This was the condition of my pist=
on and housing with close to 200,000 miles. Tranny was well maintained.<o:p=
></o:p></p><p class=3DMsoNormal>The original metal rings lasted 53 years. S=
o I guess with unknown quality of either of todays metal vs rubber<o:p></o:=
p></p><p class=3DMsoNormal>O rings, let the experiments begin. <o:p></o:p><=
/p><p class=3DMsoNormal>=C2=A0<o:p></o:p></p><p class=3DMsoNormal><o:p>&nbs=
p;</o:p></p><p class=3DMsoNormal><o:p>&nbsp;</o:p></p><div style=3D'mso-ele=
ment:para-border-div;border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0=
pt 0in 0in 0in'><p class=3DMsoNormal style=3D'border:none;padding:0in'><b>F=
rom: </b><a href=3D"mailto:[email-masked]">Bob Spidell</a><br><b>Sent=
: </b>Wednesday, August 3, 2022 10:12 PM<br><b>To: </b><a href=3D"mailto:he=
[email-masked]">[email-masked]</a><br><b>Subject: </b>Re: [He=
aleys] DW overdrive piston</p></div><p class=3DMsoNormal><o:p>&nbsp;</o:p><=
/p><p class=3DMsoNormal style=3D'margin-bottom:12.0pt'>The rings will score=
 the inside of the piston housing, though not badly (photo at 205K miles). =
Looks like there's a side load on the piston, probably from the spring.<br>=
<br>I donated this accumulator to another owner; never heard how they worke=
d. Moss shows the rings available (but who knows?).<br><br><o:p></o:p></p><=
div><p class=3DMsoNormal>On 8/3/2022 12:36 PM, Henry G Leach via Healeys wr=
ote:<o:p></o:p></p></div><blockquote style=3D'margin-top:5.0pt;margin-botto=
m:5.0pt'><p class=3DMsoNormal>I assemble ODs using the original metal rings=
 and have not had any issues with pressure or engagement/disengagement. <o:=
p></o:p></p><div><p class=3DMsoNormal><o:p>&nbsp;</o:p></p></div><div><p cl=
ass=3DMsoNormal>When Mr. DeNormanville stayed up in the middle of the night=
 to engineer the operation of the unit,&nbsp; I think he decided that the u=
se of softer rings (sacrificial metal) against a hardened casing was the be=
st solution for control and wear.&nbsp; If a rubber o-ring was a better sol=
ution, he would have used one with the proper buna rating.<o:p></o:p></p></=
div><div><p class=3DMsoNormal><o:p>&nbsp;</o:p></p></div><div><p class=3DMs=
oNormal style=3D'margin-bottom:12.0pt'>I think the bigger problem, now-a-da=
ys, is the availability of the metal piston rings.&nbsp; Rubber O rings are=
 a dime-a-dozen.&nbsp; If you contact Overdrive Spares in the UK, they shou=
ld be able to supply the proper rings.&nbsp; If they too, have decided to g=
o with rubber, then plan on a breakdown/rebuild in a shorter period of time=
 than units equipped with the original parts that last a long, long time. H=
ank<o:p></o:p></p><p>-----------------------------------------</p><p class=
=3DMsoNormal style=3D'margin-bottom:12.0pt'>From: &quot;Michael Salter&quot=
; <br>To: <a href=3D"mailto:[email-masked]">&quot;[email-masked]=
m.net&quot;</a><br>Cc: <br>Sent: Wednesday August 3 2022 9:38:15AM<br>Subje=
ct: Re: [Healeys] DW overdrive piston<o:p></o:p></p><div><div><p class=3DMs=
oNormal><span style=3D'font-size:12.0pt;font-family:"Arial",sans-serif'>I h=
ave a question about the &quot;O&quot; ring type of accumulator.<o:p></o:p>=
</span></p></div><div><p class=3DMsoNormal><span style=3D'font-size:12.0pt;=
font-family:"Arial",sans-serif'>The way the accumulator works is that when =
it is fully charged the piston moves against the spring until the rings rea=
ch the radial holes in the wall of the housing which acts to relieve any ex=
cess pressure.<o:p></o:p></span></p></div><div><p class=3DMsoNormal><span s=
tyle=3D'font-size:12.0pt;font-family:"Arial",sans-serif'>My concern is that=
 at 3 - 400 p.s.i. oil will obviously get behind the &quot;O&quot; ring and=
 force the material of the &quot;O&quot; ring into those radial holes and t=
hen, as the piston moves back over them, a piece of the ring will shear off=
.<o:p></o:p></span></p></div><div><p class=3DMsoNormal><span style=3D'font-=
size:12.0pt;font-family:"Arial",sans-serif'>I'm guessing that Laycock-DeNor=
manville used the complex cast iron rings rather than &quot;O&quot; rings b=
ecause they recognized the possibility of this happening.<o:p></o:p></span>=
</p></div><div><p class=3DMsoNormal><span style=3D'font-size:12.0pt;font-fa=
mily:"Arial",sans-serif'>I'm sure that tiny pieces of the &quot;O&quot; rin=
g would be found in the filter if this was a problem. Anyone found them or =
noticed damage to their accumulator &quot;O&quot; ring upon disassembly?<o:=
p></o:p></span></p></div><div><p class=3DMsoNormal><span style=3D'font-size=
:12.0pt;font-family:"Arial",sans-serif'><o:p>&nbsp;</o:p></span></p></div><=
div><p class=3DMsoNormal><span style=3D'font-size:12.0pt;font-family:"Arial=
",sans-serif'>M<o:p></o:p></span></p></div><div><p class=3DMsoNormal><span =
style=3D'font-size:12.0pt;font-family:"Arial",sans-serif'><o:p>&nbsp;</o:p>=
</span></p></div></div><p class=3DMsoNormal><o:p>&nbsp;</o:p></p><div><div>=
<p class=3DMsoNormal>On Wed, Aug 3, 2022 at 9:08 AM Bob Spidell &lt;bspidel=
[email-masked]&gt; wrote:<o:p></o:p></p></div><blockquote style=3D'border:no=
ne;border-left:solid #CCCCCC 1.0pt;padding:0in 0in 0in 6.0pt;margin-left:4.=
8pt;margin-right:0in'><p class=3DMsoNormal style=3D'margin-bottom:12.0pt'>I=
 put one in my BJ8's O/D. It's subjective*--O/Ds seem to work a little<br>q=
uicker with cold, thick oil than hot oil--but it cuts maybe a third off<br>=
engagement time on average. I had the O/D on the bench and disassembled,<br=
>and the current one had a scored barrel so, why not? Engagement isn't<br>m=
uch, if any, harsher than before which, I believe is the reason DMH<br>want=
ed the weaker, smaller spring. If I'd known about it, I might have<br>bough=
t AHSpares' with an O-ring instead.<br><br>* I've never really 'timed' O/D =
functioning, it would be a bit awkward;<br>anyone done it? I usually tap th=
e clutch pedal when engaging O/D, and<br>give a little throttle when diseng=
aging. I thought mine engaged a little<br>quicker when I switched to synthe=
tic fluid from engine oil, but in all<br>cases confirmation bias may be inv=
olved.<br><br><br><br>On 8/2/2022 8:09 PM, Joseph Costa wrote:<br>&gt; Has =
anyone installed their upgraded overdrive piston?&nbsp; If so, is it<br>&gt=
; worth the trouble ?<br>&gt;<br>&gt; Joe<br>&gt; BN1 #923<br>&gt;<o:p></o:=
p></p></blockquote></div></div></blockquote><p class=3DMsoNormal><o:p>&nbsp=
;</o:p></p><p class=3DMsoNormal><o:p>&nbsp;</o:p></p></div></body></html>=

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[email-masked]

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From: Bob Spidell <[email-masked]>
Date: Thu, 4 Aug 2022 06:37:31 -0700

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Warren,

Your accumulator piston and housing look to have a bit worse scoring 
than mine; I used synthetic fluid for over half the life of mine, I 
wonder if that made a difference?

>
> Sent from Mail <https://go.microsoft.com/fwlink/?LinkId=550986> for 
> Windows
>
> This was the condition of my piston and housing with close to 200,000 
> miles. Tranny was well maintained.
>
> The original metal rings lasted 53 years. So I guess with unknown 
> quality of either of todays metal vs rubber
>
> O rings, let the experiments begin.
>
> *Sent: *Wednesday, August 3, 2022 10:12 PM
> *To: [email-masked]
> *Subject: *Re: [Healeys] DW overdrive piston
>
> piston, probably from the spring.
>
>     engineer the operation of the unit,  I think he decided that the
>     use of softer rings (sacrificial metal) against a hardened casing
>     was the best solution for control and wear.  If a rubber o-ring
>     was a better solution, he would have used one with the proper buna
>     rating.
>
>     metal piston rings.  Rubber O rings are a dime-a-dozen. If you
>     contact Overdrive Spares in the UK, they should be able to supply
>     the proper rings.  If they too, have decided to go with rubber,
>     then plan on a breakdown/rebuild in a shorter period of time than
>     units equipped with the original parts that last a long, long
>     time. Hank
>
>     piston moves against the spring until the rings reach the radial
>     holes in the wall of the housing which acts to relieve any excess
>     pressure.
>
>     My concern is that at 3 - 400 p.s.i. oil will obviously get behind
>     the "O" ring and force the material of the "O" ring into those
>     radial holes and then, as the piston moves back over them, a piece
>     of the ring will shear off.
>
>     rings rather than "O" rings because they recognized the
>     possibility of this happening.
>
>     I'm sure that tiny pieces of the "O" ring would be found in the
>     filter if this was a problem. Anyone found them or noticed damage
>     to their accumulator "O" ring upon disassembly?
>
>     M
>
>         I put one in my BJ8's O/D. It's subjective*--O/Ds seem to work
>         a little
>         Engagement isn't
>         reason DMH
>         engaged a little

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    Warren,<br>
    <br>
    Your accumulator piston and housing look to have a bit worse scoring
    than mine; I used synthetic fluid for over half the life of mine, I
    wonder if that made a difference?<br>
    <br>
    <br>
    <blockquote type="cite"
      cite="mid:[email-masked]">
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      <div class="WordSection1">
        <p class="MsoNormal"><br>
        </p>
        <p class="MsoNormal"><o:p> </o:p></p>
        <p class="MsoNormal">Sent from <a
            href="https://go.microsoft.com/fwlink/?LinkId=550986"
            moz-do-not-send="true">Mail</a> for Windows</p>
        <p class="MsoNormal"><o:p> </o:p></p>
        <p class="MsoNormal">This was the condition of my piston and
          housing with close to 200,000 miles. Tranny was well
          maintained.<o:p></o:p></p>
        <p class="MsoNormal">The original metal rings lasted 53 years.
          So I guess with unknown quality of either of todays metal vs
          rubber<o:p></o:p></p>
        <p class="MsoNormal">O rings, let the experiments begin. <o:p></o:p></p>
        <p class="MsoNormal"> <o:p></o:p></p>
        <p class="MsoNormal"><o:p> </o:p></p>
        <p class="MsoNormal"><o:p> </o:p></p>
        <div
          style="mso-element:para-border-div;border:none;border-top:solid
          #E1E1E1 1.0pt;padding:3.0pt 0in 0in 0in">
          <p class="MsoNormal" style="border:none;padding:0in"><b>From:
            </b><a href="mailto:[email-masked]"
              moz-do-not-send="true">Bob Spidell</a><br>
            <b>Sent: </b>Wednesday, August 3, 2022 10:12 PM<br>
            <b>To: </b><a href="mailto:[email-masked]"
              moz-do-not-send="true" class="moz-txt-link-freetext">[email-masked]</a><br>
            <b>Subject: </b>Re: [Healeys] DW overdrive piston</p>
        </div>
        <p class="MsoNormal"><o:p> </o:p></p>
        <p class="MsoNormal" style="margin-bottom:12.0pt">The rings will
          score the inside of the piston housing, though not badly
          (photo at 205K miles). Looks like there's a side load on the
          piston, probably from the spring.<br>
          <br>
          I donated this accumulator to another owner; never heard how
          they worked. Moss shows the rings available (but who knows?).<br>
          <br>
          <o:p></o:p></p>
        <div>
          <p class="MsoNormal">On 8/3/2022 12:36 PM, Henry G Leach via
            Healeys wrote:<o:p></o:p></p>
        </div>
        <blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
          <p class="MsoNormal">I assemble ODs using the original metal
            rings and have not had any issues with pressure or
            engagement/disengagement. <o:p></o:p></p>
          <div>
            <p class="MsoNormal"><o:p> </o:p></p>
          </div>
          <div>
            <p class="MsoNormal">When Mr. DeNormanville stayed up in the
              middle of the night to engineer the operation of the
              unit,  I think he decided that the use of softer rings
              (sacrificial metal) against a hardened casing was the best
              solution for control and wear.  If a rubber o-ring was a
              better solution, he would have used one with the proper
              buna rating.<o:p></o:p></p>
          </div>
          <div>
            <p class="MsoNormal"><o:p> </o:p></p>
          </div>
          <div>
            <p class="MsoNormal" style="margin-bottom:12.0pt">I think
              the bigger problem, now-a-days, is the availability of the
              metal piston rings.  Rubber O rings are a dime-a-dozen. 
              If you contact Overdrive Spares in the UK, they should be
              able to supply the proper rings.  If they too, have
              decided to go with rubber, then plan on a
              breakdown/rebuild in a shorter period of time than units
              equipped with the original parts that last a long, long
              time. Hank<o:p></o:p></p>
            <p>-----------------------------------------</p>
            <p class="MsoNormal" style="margin-bottom:12.0pt">From:
              "Michael Salter" <br>
              To: <a href="mailto:[email-masked]"
                moz-do-not-send="true">"[email-masked]"</a><br>
              Cc: <br>
              Sent: Wednesday August 3 2022 9:38:15AM<br>
              Subject: Re: [Healeys] DW overdrive piston<o:p></o:p></p>
            <div>
              <div>
                <p class="MsoNormal"><span
                    style="font-size:12.0pt;font-family:&quot;Arial&quot;,sans-serif">I
                    have a question about the "O" ring type of
                    accumulator.<o:p></o:p></span></p>
              </div>
              <div>
                <p class="MsoNormal"><span
                    style="font-size:12.0pt;font-family:&quot;Arial&quot;,sans-serif">The
                    way the accumulator works is that when it is fully
                    charged the piston moves against the spring until
                    the rings reach the radial holes in the wall of the
                    housing which acts to relieve any excess pressure.<o:p></o:p></span></p>
              </div>
              <div>
                <p class="MsoNormal"><span
                    style="font-size:12.0pt;font-family:&quot;Arial&quot;,sans-serif">My
                    concern is that at 3 - 400 p.s.i. oil will obviously
                    get behind the "O" ring and force the material of
                    the "O" ring into those radial holes and then, as
                    the piston moves back over them, a piece of the ring
                    will shear off.<o:p></o:p></span></p>
              </div>
              <div>
                <p class="MsoNormal"><span
                    style="font-size:12.0pt;font-family:&quot;Arial&quot;,sans-serif">I'm
                    guessing that Laycock-DeNormanville used the complex
                    cast iron rings rather than "O" rings because they
                    recognized the possibility of this happening.<o:p></o:p></span></p>
              </div>
              <div>
                <p class="MsoNormal"><span
                    style="font-size:12.0pt;font-family:&quot;Arial&quot;,sans-serif">I'm
                    sure that tiny pieces of the "O" ring would be found
                    in the filter if this was a problem. Anyone found
                    them or noticed damage to their accumulator "O" ring
                    upon disassembly?<o:p></o:p></span></p>
              </div>
              <div>
                <p class="MsoNormal"><span
                    style="font-size:12.0pt;font-family:&quot;Arial&quot;,sans-serif"><o:p> </o:p></span></p>
              </div>
              <div>
                <p class="MsoNormal"><span
                    style="font-size:12.0pt;font-family:&quot;Arial&quot;,sans-serif">M<o:p></o:p></span></p>
              </div>
              <div>
                <p class="MsoNormal"><span
                    style="font-size:12.0pt;font-family:&quot;Arial&quot;,sans-serif"><o:p> </o:p></span></p>
              </div>
            </div>
            <p class="MsoNormal"><o:p> </o:p></p>
            <div>
              <div>
                <p class="MsoNormal">On Wed, Aug 3, 2022 at 9:08 AM Bob
                  Spidell <a class="moz-txt-link-rfc2396E" href="mailto:[email-masked]">&lt;[email-masked]&gt;</a> wrote:<o:p></o:p></p>
              </div>
              <blockquote style="border:none;border-left:solid #CCCCCC
                1.0pt;padding:0in 0in 0in
                6.0pt;margin-left:4.8pt;margin-right:0in">
                <p class="MsoNormal" style="margin-bottom:12.0pt">I put
                  one in my BJ8's O/D. It's subjective*--O/Ds seem to
                  work a little<br>
                  quicker with cold, thick oil than hot oil--but it cuts
                  maybe a third off<br>
                  engagement time on average. I had the O/D on the bench
                  and disassembled,<br>
                  and the current one had a scored barrel so, why not?
                  Engagement isn't<br>
                  much, if any, harsher than before which, I believe is
                  the reason DMH<br>
                  wanted the weaker, smaller spring. If I'd known about
                  it, I might have<br>
                  bought AHSpares' with an O-ring instead.<br>
                  <br>
                  * I've never really 'timed' O/D functioning, it would
                  be a bit awkward;<br>
                  anyone done it? I usually tap the clutch pedal when
                  engaging O/D, and<br>
                  give a little throttle when disengaging. I thought
                  mine engaged a little<br>
                  quicker when I switched to synthetic fluid from engine
                  oil, but in all<br>
                  cases confirmation bias may be involved.<br>
                  <br>
                  <br>
                  <br>
                  On 8/2/2022 8:09 PM, Joseph Costa wrote:<br>
                  &gt; Has anyone installed their upgraded overdrive
                  piston?  If so, is it<br>
                  &gt; worth the trouble ?<br>
                  &gt;<br>
                  &gt; Joe<br>
                  &gt; BN1 #923<br>
                  &gt;<o:p></o:p></p>
              </blockquote>
            </div>
          </div>
        </blockquote>
        <p class="MsoNormal"><o:p> </o:p></p>
        <p class="MsoNormal"><o:p> </o:p></p>
      </div>
    </blockquote>
    <br>
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[email-masked]

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---

From: Warren Dietz <[email-masked]>
Date: Thu, 4 Aug 2022 10:28:22 -0400

--===============8372188758246064089==
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<html xmlns:o=3D"urn:schemas-microsoft-com:office:office" xmlns:w=3D"urn:sc=
hemas-microsoft-com:office:word" xmlns:m=3D"http://schemas.microsoft.com/of=
fice/2004/12/omml" xmlns=3D"http://www.w3.org/TR/REC-html40"><head><meta ht=
tp-equiv=3DContent-Type content=3D"text/html; charset=3Dutf-8"><meta name=
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--></style></head><body lang=3DEN-US link=3Dblue vlink=3D"#954F72" style=3D=
'word-wrap:break-word'><div class=3DWordSection1><p class=3DMsoNormal>Bob,<=
/p><p class=3DMsoNormal>Interesting observation.</p><p class=3DMsoNormal>On=
ly 30/40 wt non detergent oil was used from new till 2013=C2=A0 at which ti=
me I switched</p><p class=3DMsoNormal>to Redline MT90 @ 181,000 miles.</p><=
p class=3DMsoNormal><o:p>&nbsp;</o:p></p><p class=3DMsoNormal>Sent from <a =
href=3D"https://go.microsoft.com/fwlink/?LinkId=3D550986">Mail</a> for Wind=
ows</p><p class=3DMsoNormal><o:p>&nbsp;</o:p></p><div style=3D'mso-element:=
para-border-div;border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0i=
n 0in 0in'><p class=3DMsoNormal style=3D'border:none;padding:0in'><b>From: =
</b><a href=3D"mailto:[email-masked]">Bob Spidell</a><br><b>Sent: </b=
>Thursday, August 4, 2022 9:38 AM<br><b>To: </b><a href=3D"mailto:flyhiheal=
[email-masked]">Warren Dietz</a>; <a href=3D"mailto:[email-masked]">h=
[email-masked]</a><br><b>Subject: </b>Re: [Healeys] DW overdrive pis=
ton</p></div><p class=3DMsoNormal><o:p>&nbsp;</o:p></p><p class=3DMsoNormal=
>Warren,<br><br>Your accumulator piston and housing look to have a bit wors=
e scoring than mine; I used synthetic fluid for over half the life of mine,=
 I wonder if that made a difference?<br><br><br><br><o:p></o:p></p><blockqu=
ote style=3D'margin-top:5.0pt;margin-bottom:5.0pt'><p class=3DMsoNormal><o:=
p>&nbsp;</o:p></p><p class=3DMsoNormal>&nbsp;<o:p></o:p></p><p class=3DMsoN=
ormal>Sent from <a href=3D"https://go.microsoft.com/fwlink/?LinkId=3D550986=
">Mail</a> for Windows<o:p></o:p></p><p class=3DMsoNormal>&nbsp;<o:p></o:p>=
</p><p class=3DMsoNormal>This was the condition of my piston and housing wi=
th close to 200,000 miles. Tranny was well maintained.<o:p></o:p></p><p cla=
ss=3DMsoNormal>The original metal rings lasted 53 years. So I guess with un=
known quality of either of todays metal vs rubber<o:p></o:p></p><p class=3D=
MsoNormal>O rings, let the experiments begin. <o:p></o:p></p><p class=3DMso=
Normal>&nbsp;<o:p></o:p></p><p class=3DMsoNormal>&nbsp;<o:p></o:p></p><p cl=
ass=3DMsoNormal>&nbsp;<o:p></o:p></p><div style=3D'border:none;border-top:s=
olid #E1E1E1 1.0pt;padding:3.0pt 0in 0in 0in'><p class=3DMsoNormal><b>From:=
 </b><a href=3D"mailto:[email-masked]">Bob Spidell</a><br><b>Sent: </=
b>Wednesday, August 3, 2022 10:12 PM<br><b>To: </b><a href=3D"mailto:healey=
[email-masked]">[email-masked]</a><br><b>Subject: </b>Re: [Healey=
s] DW overdrive piston<o:p></o:p></p></div><p class=3DMsoNormal>&nbsp;<o:p>=
</o:p></p><p class=3DMsoNormal style=3D'margin-bottom:12.0pt'>The rings wil=
l score the inside of the piston housing, though not badly (photo at 205K m=
iles). Looks like there's a side load on the piston, probably from the spri=
ng.<br><br>I donated this accumulator to another owner; never heard how the=
y worked. Moss shows the rings available (but who knows?).<o:p></o:p></p><d=
iv><p class=3DMsoNormal>On 8/3/2022 12:36 PM, Henry G Leach via Healeys wro=
te:<o:p></o:p></p></div><blockquote style=3D'margin-top:5.0pt;margin-bottom=
:5.0pt'><p class=3DMsoNormal>I assemble ODs using the original metal rings =
and have not had any issues with pressure or engagement/disengagement. <o:p=
></o:p></p><div><p class=3DMsoNormal>&nbsp;<o:p></o:p></p></div><div><p cla=
ss=3DMsoNormal>When Mr. DeNormanville stayed up in the middle of the night =
to engineer the operation of the unit,&nbsp; I think he decided that the us=
e of softer rings (sacrificial metal) against a hardened casing was the bes=
t solution for control and wear.&nbsp; If a rubber o-ring was a better solu=
tion, he would have used one with the proper buna rating.<o:p></o:p></p></d=
iv><div><p class=3DMsoNormal>&nbsp;<o:p></o:p></p></div><div><p class=3DMso=
Normal style=3D'margin-bottom:12.0pt'>I think the bigger problem, now-a-day=
s, is the availability of the metal piston rings.&nbsp; Rubber O rings are =
a dime-a-dozen.&nbsp; If you contact Overdrive Spares in the UK, they shoul=
d be able to supply the proper rings.&nbsp; If they too, have decided to go=
 with rubber, then plan on a breakdown/rebuild in a shorter period of time =
than units equipped with the original parts that last a long, long time. Ha=
nk<o:p></o:p></p><p>-----------------------------------------</p><p class=
=3DMsoNormal style=3D'margin-bottom:12.0pt'>From: &quot;Michael Salter&quot=
; <br>To: <a href=3D"mailto:[email-masked]">&quot;[email-masked]=
m.net&quot;</a><br>Cc: <br>Sent: Wednesday August 3 2022 9:38:15AM<br>Subje=
ct: Re: [Healeys] DW overdrive piston<o:p></o:p></p><div><div><p class=3DMs=
oNormal><span style=3D'font-size:12.0pt;font-family:"Arial",sans-serif'>I h=
ave a question about the &quot;O&quot; ring type of accumulator.</span><o:p=
></o:p></p></div><div><p class=3DMsoNormal><span style=3D'font-size:12.0pt;=
font-family:"Arial",sans-serif'>The way the accumulator works is that when =
it is fully charged the piston moves against the spring until the rings rea=
ch the radial holes in the wall of the housing which acts to relieve any ex=
cess pressure.</span><o:p></o:p></p></div><div><p class=3DMsoNormal><span s=
tyle=3D'font-size:12.0pt;font-family:"Arial",sans-serif'>My concern is that=
 at 3 - 400 p.s.i. oil will obviously get behind the &quot;O&quot; ring and=
 force the material of the &quot;O&quot; ring into those radial holes and t=
hen, as the piston moves back over them, a piece of the ring will shear off=
.</span><o:p></o:p></p></div><div><p class=3DMsoNormal><span style=3D'font-=
size:12.0pt;font-family:"Arial",sans-serif'>I'm guessing that Laycock-DeNor=
manville used the complex cast iron rings rather than &quot;O&quot; rings b=
ecause they recognized the possibility of this happening.</span><o:p></o:p>=
</p></div><div><p class=3DMsoNormal><span style=3D'font-size:12.0pt;font-fa=
mily:"Arial",sans-serif'>I'm sure that tiny pieces of the &quot;O&quot; rin=
g would be found in the filter if this was a problem. Anyone found them or =
noticed damage to their accumulator &quot;O&quot; ring upon disassembly?</s=
pan><o:p></o:p></p></div><div><p class=3DMsoNormal><span style=3D'font-size=
:12.0pt;font-family:"Arial",sans-serif'>&nbsp;</span><o:p></o:p></p></div><=
div><p class=3DMsoNormal><span style=3D'font-size:12.0pt;font-family:"Arial=
",sans-serif'>M</span><o:p></o:p></p></div><div><p class=3DMsoNormal><span =
style=3D'font-size:12.0pt;font-family:"Arial",sans-serif'>&nbsp;</span><o:p=
></o:p></p></div></div><p class=3DMsoNormal>&nbsp;<o:p></o:p></p><div><div>=
<p class=3DMsoNormal>On Wed, Aug 3, 2022 at 9:08 AM Bob Spidell <a href=3D"=
mailto:[email-masked]">&lt;[email-masked]&gt;</a> wrote:<o:p></=
o:p></p></div><blockquote style=3D'border:none;border-left:solid #CCCCCC 1.=
0pt;padding:0in 0in 0in 6.0pt;margin-left:4.8pt;margin-top:5.0pt;margin-rig=
ht:0in;margin-bottom:5.0pt'><p class=3DMsoNormal style=3D'mso-margin-top-al=
t:0in;margin-right:0in;margin-bottom:12.0pt;margin-left:153.6pt'>I put one =
in my BJ8's O/D. It's subjective*--O/Ds seem to work a little<br>quicker wi=
th cold, thick oil than hot oil--but it cuts maybe a third off<br>engagemen=
t time on average. I had the O/D on the bench and disassembled,<br>and the =
current one had a scored barrel so, why not? Engagement isn't<br>much, if a=
ny, harsher than before which, I believe is the reason DMH<br>wanted the we=
aker, smaller spring. If I'd known about it, I might have<br>bought AHSpare=
s' with an O-ring instead.<br><br>* I've never really 'timed' O/D functioni=
ng, it would be a bit awkward;<br>anyone done it? I usually tap the clutch =
pedal when engaging O/D, and<br>give a little throttle when disengaging. I =
thought mine engaged a little<br>quicker when I switched to synthetic fluid=
 from engine oil, but in all<br>cases confirmation bias may be involved.<br=
><br><br><br>On 8/2/2022 8:09 PM, Joseph Costa wrote:<br>&gt; Has anyone in=
stalled their upgraded overdrive piston?&nbsp; If so, is it<br>&gt; worth t=
he trouble ?<br>&gt;<br>&gt; Joe<br>&gt; BN1 #923<br>&gt;<o:p></o:p></p></b=
lockquote></div></div></blockquote><p class=3DMsoNormal>&nbsp;<o:p></o:p></=
p><p class=3DMsoNormal>&nbsp;<o:p></o:p></p></blockquote><p class=3DMsoNorm=
al><o:p>&nbsp;</o:p></p><p class=3DMsoNormal><o:p>&nbsp;</o:p></p></div></b=
ody></html>=

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[email-masked]

--===============8372188758246064089==--

---

From: Michael Salter via Healeys <[email-masked]>
Date: Thu, 4 Aug 2022 12:38:47 -0400

--===============5055493392664590298==

--000000000000858d6405e56cfc5c

Based upon my observations when the aluminium overdrive accumulator
housings are scored you will invariably find that there are chips out of
the non syncro 1st and reverse gears and usually badly damaged laygear
rollers.
Because these gearboxes were not fitted with chip gathering magnet
originally the tiny hardened steel chips eventually find their way into the
overdrive then through the overdrive pump gauze (because the magnets
originally fitted in the overdrive have been lost by " the lube guy") and
lodge in the accumulator.
Those chips very quickly score the cylinder as the accumulator piston moves.
If you are careful to never grind 1st or reverse no chips will be created,
that will mean that they don't go through the laygear bearings or find
their way into the overdrive.
A magnetic plug in the gearbox is great insurance.

M

On Thu., Aug. 4, 2022, 12:13 p.m. Warren Dietz, <[email-masked]>
wrote:

> Bob,
>
> Interesting observation.
>
> Only 30/40 wt non detergent oil was used from new till 2013  at which time
> I switched
>
> to Redline MT90 @ 181,000 miles.
>
>
>
> *From: *Bob Spidell <[email-masked]>
> *Sent: *Thursday, August 4, 2022 9:38 AM
> *To: *Warren Dietz <[email-masked]>; [email-masked]
> Your accumulator piston and housing look to have a bit worse scoring than
> mine; I used synthetic fluid for over half the life of mine, I wonder if
> that made a difference?
>
>
>
>
>
>
>
> The original metal rings lasted 53 years. So I guess with unknown quality
> of either of todays metal vs rubber
>
> *From: *Bob Spidell <[email-masked]>
> I donated this accumulator to another owner; never heard how they worked.
> Moss shows the rings available (but who knows?).
>
> I assemble ODs using the original metal rings and have not had any issues
> with pressure or engagement/disengagement.
>
>
>
> When Mr. DeNormanville stayed up in the middle of the night to engineer
> the operation of the unit,  I think he decided that the use of softer rings
> (sacrificial metal) against a hardened casing was the best solution for
> control and wear.  If a rubber o-ring was a better solution, he would have
> used one with the proper buna rating.
>
>
>
> I think the bigger problem, now-a-days, is the availability of the metal
> piston rings.  Rubber O rings are a dime-a-dozen.  If you contact Overdrive
> Spares in the UK, they should be able to supply the proper rings.  If they
> too, have decided to go with rubber, then plan on a breakdown/rebuild in a
> shorter period of time than units equipped with the original parts that
> last a long, long time. Hank
>
> To: "[email-masked]" <[email-masked]>
> Cc:
> The way the accumulator works is that when it is fully charged the piston
> moves against the spring until the rings reach the radial holes in the wall
> of the housing which acts to relieve any excess pressure.
>
> My concern is that at 3 - 400 p.s.i. oil will obviously get behind the "O"
> ring and force the material of the "O" ring into those radial holes and
> then, as the piston moves back over them, a piece of the ring will shear
> off.
>
> I'm guessing that Laycock-DeNormanville used the complex cast iron rings
> rather than "O" rings because they recognized the possibility of this
> happening.
>
> I'm sure that tiny pieces of the "O" ring would be found in the filter if
> this was a problem. Anyone found them or noticed damage to their
> On Wed, Aug 3, 2022 at 9:08 AM Bob Spidell <[email-masked]>
> <[email-masked]> wrote:
>
> I put one in my BJ8's O/D. It's subjective*--O/Ds seem to work a little
> quicker with cold, thick oil than hot oil--but it cuts maybe a third off
> engagement time on average. I had the O/D on the bench and disassembled,
> * I've never really 'timed' O/D functioning, it would be a bit awkward;
> give a little throttle when disengaging. I thought mine engaged a little
> Support Team.Net http://www.team.net/donate.html
> Suggested annual donation  $12.75
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> http://autox.team.net/mailman/options/healeys/[email-masked]
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>

--000000000000858d6405e56cfc5c
Content-Transfer-Encoding: quoted-printable

<div dir=3D"auto">Based upon my observations when the aluminium overdrive a=
ccumulator housings are scored you will invariably find that there are chip=
s out of the non syncro 1st and reverse gears and usually badly damaged lay=
gear rollers.<div dir=3D"auto">Because these gearboxes were not fitted with=
 chip gathering magnet originally the tiny hardened steel chips eventually =
find their way into the overdrive then through the overdrive pump gauze (be=
cause the magnets originally fitted in the overdrive have been lost by &quo=
t; the lube guy&quot;) and lodge in the accumulator.=C2=A0</div><div dir=3D=
"auto">Those chips very quickly score the cylinder as the accumulator pisto=
n moves.</div><div dir=3D"auto">If you are careful to never grind 1st or re=
verse no chips will be created, that will mean that they don&#39;t go throu=
gh the laygear bearings or find their way into the overdrive.=C2=A0</div><d=
iv dir=3D"auto">A magnetic plug in the gearbox is great insurance.</div><di=
v dir=3D"auto"><br></div><div dir=3D"auto">M</div></div><br><div class=3D"g=
mail_quote"><div dir=3D"ltr" class=3D"gmail_attr">On Thu., Aug. 4, 2022, 12=
:13 p.m. Warren Dietz, &lt;<a href=3D"mailto:[email-masked]">flyhihe=
[email-masked]</a>&gt; wrote:<br></div><blockquote class=3D"gmail_quote" st=
yle=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div =
lang=3D"EN-US" link=3D"blue" vlink=3D"#954F72" style=3D"word-wrap:break-wor=
d"><div class=3D"m_-3387470703538253816WordSection1"><p class=3D"MsoNormal"=
>Bob,</p><p class=3D"MsoNormal">Interesting observation.</p><p class=3D"Mso=
Normal">Only 30/40 wt non detergent oil was used from new till 2013=C2=A0 a=
t which time I switched</p><p class=3D"MsoNormal">to Redline MT90 @ 181,000=
 miles.</p><p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p><p class=3D"MsoNo=
rmal">Sent from <a href=3D"https://go.microsoft.com/fwlink/?LinkId=3D550986=
" target=3D"_blank" rel=3D"noreferrer">Mail</a> for Windows</p><p class=3D"=
MsoNormal"><u></u>=C2=A0<u></u></p><div style=3D"border:none;border-top:sol=
id #e1e1e1 1.0pt;padding:3.0pt 0in 0in 0in"><p class=3D"MsoNormal" style=3D=
"border:none;padding:0in"><b>From: </b><a href=3D"mailto:[email-masked]=
et" target=3D"_blank" rel=3D"noreferrer">Bob Spidell</a><br><b>Sent: </b>Th=
ursday, August 4, 2022 9:38 AM<br><b>To: </b><a href=3D"mailto:flyhihealey@=
gmail.com" target=3D"_blank" rel=3D"noreferrer">Warren Dietz</a>; <a href=
=3D"mailto:[email-masked]" target=3D"_blank" rel=3D"noreferrer">hea=
[email-masked]</a><br><b>Subject: </b>Re: [Healeys] DW overdrive pisto=
n</p></div><p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p><p class=3D"MsoNo=
rmal">Warren,<br><br>Your accumulator piston and housing look to have a bit=
 worse scoring than mine; I used synthetic fluid for over half the life of =
mine, I wonder if that made a difference?<br><br><br><br><u></u><u></u></p>=
<blockquote style=3D"margin-top:5.0pt;margin-bottom:5.0pt"><p class=3D"MsoN=
ormal"><u></u>=C2=A0<u></u></p><p class=3D"MsoNormal">=C2=A0<u></u><u></u><=
/p><p class=3D"MsoNormal">Sent from <a href=3D"https://go.microsoft.com/fwl=
ink/?LinkId=3D550986" target=3D"_blank" rel=3D"noreferrer">Mail</a> for Win=
dows<u></u><u></u></p><p class=3D"MsoNormal">=C2=A0<u></u><u></u></p><p cla=
ss=3D"MsoNormal">This was the condition of my piston and housing with close=
 to 200,000 miles. Tranny was well maintained.<u></u><u></u></p><p class=3D=
"MsoNormal">The original metal rings lasted 53 years. So I guess with unkno=
wn quality of either of todays metal vs rubber<u></u><u></u></p><p class=3D=
"MsoNormal">O rings, let the experiments begin. <u></u><u></u></p><p class=
=3D"MsoNormal">=C2=A0<u></u><u></u></p><p class=3D"MsoNormal">=C2=A0<u></u>=
<u></u></p><p class=3D"MsoNormal">=C2=A0<u></u><u></u></p><div style=3D"bor=
der:none;border-top:solid #e1e1e1 1.0pt;padding:3.0pt 0in 0in 0in"><p class=
=3D"MsoNormal"><b>From: </b><a href=3D"mailto:[email-masked]" target=
=3D"_blank" rel=3D"noreferrer">Bob Spidell</a><br><b>Sent: </b>Wednesday, A=
ugust 3, 2022 10:12 PM<br><b>To: </b><a href=3D"mailto:[email-masked]=
et" target=3D"_blank" rel=3D"noreferrer">[email-masked]</a><br><b>S=
ubject: </b>Re: [Healeys] DW overdrive piston<u></u><u></u></p></div><p cla=
ss=3D"MsoNormal">=C2=A0<u></u><u></u></p><p class=3D"MsoNormal" style=3D"ma=
rgin-bottom:12.0pt">The rings will score the inside of the piston housing, =
though not badly (photo at 205K miles). Looks like there&#39;s a side load =
on the piston, probably from the spring.<br><br>I donated this accumulator =
to another owner; never heard how they worked. Moss shows the rings availab=
le (but who knows?).<u></u><u></u></p><div><p class=3D"MsoNormal">On 8/3/20=
22 12:36 PM, Henry G Leach via Healeys wrote:<u></u><u></u></p></div><block=
quote style=3D"margin-top:5.0pt;margin-bottom:5.0pt"><p class=3D"MsoNormal"=
>I assemble ODs using the original metal rings and have not had any issues =
with pressure or engagement/disengagement. <u></u><u></u></p><div><p class=
=3D"MsoNormal">=C2=A0<u></u><u></u></p></div><div><p class=3D"MsoNormal">Wh=
en Mr. DeNormanville stayed up in the middle of the night to engineer the o=
peration of the unit,=C2=A0 I think he decided that the use of softer rings=
 (sacrificial metal) against a hardened casing was the best solution for co=
ntrol and wear.=C2=A0 If a rubber o-ring was a better solution, he would ha=
ve used one with the proper buna rating.<u></u><u></u></p></div><div><p cla=
ss=3D"MsoNormal">=C2=A0<u></u><u></u></p></div><div><p class=3D"MsoNormal" =
style=3D"margin-bottom:12.0pt">I think the bigger problem, now-a-days, is t=
he availability of the metal piston rings.=C2=A0 Rubber O rings are a dime-=
a-dozen.=C2=A0 If you contact Overdrive Spares in the UK, they should be ab=
le to supply the proper rings.=C2=A0 If they too, have decided to go with r=
ubber, then plan on a breakdown/rebuild in a shorter period of time than un=
its equipped with the original parts that last a long, long time. Hank<u></=
u><u></u></p><p>-----------------------------------------</p><p class=3D"Ms=
oNormal" style=3D"margin-bottom:12.0pt">From: &quot;Michael Salter&quot; <b=
r>To: <a href=3D"mailto:[email-masked]" target=3D"_blank" rel=3D"no=
referrer">&quot;[email-masked]&quot;</a><br>Cc: <br>Sent: Wednesday=
 August 3 2022 9:38:15AM<br>Subject: Re: [Healeys] DW overdrive piston<u></=
u><u></u></p><div><div><p class=3D"MsoNormal"><span style=3D"font-size:12.0=
pt;font-family:&quot;Arial&quot;,sans-serif">I have a question about the &q=
uot;O&quot; ring type of accumulator.</span><u></u><u></u></p></div><div><p=
 class=3D"MsoNormal"><span style=3D"font-size:12.0pt;font-family:&quot;Aria=
l&quot;,sans-serif">The way the accumulator works is that when it is fully =
charged the piston moves against the spring until the rings reach the radia=
l holes in the wall of the housing which acts to relieve any excess pressur=
e.</span><u></u><u></u></p></div><div><p class=3D"MsoNormal"><span style=3D=
"font-size:12.0pt;font-family:&quot;Arial&quot;,sans-serif">My concern is t=
hat at 3 - 400 p.s.i. oil will obviously get behind the &quot;O&quot; ring =
and force the material of the &quot;O&quot; ring into those radial holes an=
d then, as the piston moves back over them, a piece of the ring will shear =
off.</span><u></u><u></u></p></div><div><p class=3D"MsoNormal"><span style=
=3D"font-size:12.0pt;font-family:&quot;Arial&quot;,sans-serif">I&#39;m gues=
sing that Laycock-DeNormanville used the complex cast iron rings rather tha=
n &quot;O&quot; rings because they recognized the possibility of this happe=
ning.</span><u></u><u></u></p></div><div><p class=3D"MsoNormal"><span style=
=3D"font-size:12.0pt;font-family:&quot;Arial&quot;,sans-serif">I&#39;m sure=
 that tiny pieces of the &quot;O&quot; ring would be found in the filter if=
 this was a problem. Anyone found them or noticed damage to their accumulat=
or &quot;O&quot; ring upon disassembly?</span><u></u><u></u></p></div><div>=
<p class=3D"MsoNormal"><span style=3D"font-size:12.0pt;font-family:&quot;Ar=
ial&quot;,sans-serif">=C2=A0</span><u></u><u></u></p></div><div><p class=3D=
"MsoNormal"><span style=3D"font-size:12.0pt;font-family:&quot;Arial&quot;,s=
ans-serif">M</span><u></u><u></u></p></div><div><p class=3D"MsoNormal"><spa=
n style=3D"font-size:12.0pt;font-family:&quot;Arial&quot;,sans-serif">=C2=
=A0</span><u></u><u></u></p></div></div><p class=3D"MsoNormal">=C2=A0<u></u=
><u></u></p><div><div><p class=3D"MsoNormal">On Wed, Aug 3, 2022 at 9:08 AM=
 Bob Spidell <a href=3D"mailto:[email-masked]" target=3D"_blank" rel=
=3D"noreferrer">&lt;[email-masked]&gt;</a> wrote:<u></u><u></u></p></=
div><blockquote style=3D"border:none;border-left:solid #cccccc 1.0pt;paddin=
g:0in 0in 0in 6.0pt;margin-left:4.8pt;margin-top:5.0pt;margin-right:0in;mar=
gin-bottom:5.0pt"><p class=3D"MsoNormal" style=3D"margin-right:0in;margin-b=
ottom:12.0pt;margin-left:153.6pt">I put one in my BJ8&#39;s O/D. It&#39;s s=
ubjective*--O/Ds seem to work a little<br>quicker with cold, thick oil than=
 hot oil--but it cuts maybe a third off<br>engagement time on average. I ha=
d the O/D on the bench and disassembled,<br>and the current one had a score=
d barrel so, why not? Engagement isn&#39;t<br>much, if any, harsher than be=
fore which, I believe is the reason DMH<br>wanted the weaker, smaller sprin=
g. If I&#39;d known about it, I might have<br>bought AHSpares&#39; with an =
O-ring instead.<br><br>* I&#39;ve never really &#39;timed&#39; O/D function=
ing, it would be a bit awkward;<br>anyone done it? I usually tap the clutch=
 pedal when engaging O/D, and<br>give a little throttle when disengaging. I=
 thought mine engaged a little<br>quicker when I switched to synthetic flui=
d from engine oil, but in all<br>cases confirmation bias may be involved.<b=
r><br><br><br>On 8/2/2022 8:09 PM, Joseph Costa wrote:<br>&gt; Has anyone i=
nstalled their upgraded overdrive piston?=C2=A0 If so, is it<br>&gt; worth =
the trouble ?<br>&gt;<br>&gt; Joe<br>&gt; BN1 #923<br>&gt;<u></u><u></u></p=
></blockquote></div></div></blockquote><p class=3D"MsoNormal">=C2=A0<u></u>=
<u></u></p><p class=3D"MsoNormal">=C2=A0<u></u><u></u></p></blockquote><p c=
lass=3D"MsoNormal"><u></u>=C2=A0<u></u></p><p class=3D"MsoNormal"><u></u>=
=C2=A0<u></u></p></div></div>
_______________________________________________<br>
rer noreferrer" target=3D"_blank">http://www.team.net/donate.html</a><br>
<br>
Archive: <a href=3D"http://www.team.net/pipermail/healeys" rel=3D"noreferre=
r noreferrer" target=3D"_blank">http://www.team.net/pipermail/healeys</a> <=
a href=3D"http://autox.team.net/archive/healeys" rel=3D"noreferrer noreferr=
er" target=3D"_blank">http://autox.team.net/archive/healeys</a><br>
<br>
<a href=3D"mailto:[email-masked]" target=3D"_blank" rel=3D"noreferr=
er">[email-masked]</a><br>
<a href=3D"http://autox.team.net/mailman/listinfo/healeys" rel=3D"noreferre=
r noreferrer" target=3D"_blank">http://autox.team.net/mailman/listinfo/heal=
eys</a><br>
<br>
s/[email-masked]" rel=3D"noreferrer noreferrer" target=3D"_blank">=
http://autox.team.net/mailman/options/healeys/[email-masked]</a><b=
r>
<br>
</blockquote></div>

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[email-masked]

--===============5055493392664590298==--

---

From: Bob Spidell <[email-masked]>
Date: Thu, 4 Aug 2022 10:12:30 -0700

This is a multi-part message in MIME format.
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OK, who sells magnetic plugs for MOWOG gearboxes? I'd be willing to 
order from Canada ;)

I don't remember exactly when I started using MT-90 in my gearbox, but 
it was probably around 90-100K miles. I was hoping it would make the O/D 
a bit more responsive, but was surprised that shifting seemed smoother 
(I wasn't expecting it, so little-no confirmation bias).

On 8/4/2022 9:38 AM, Michael Salter wrote:
> housings are scored you will invariably find that there are chips out 
> of the non syncro 1st and reverse gears and usually badly damaged 
> laygear rollers.
> originally the tiny hardened steel chips eventually find their way 
> into the overdrive then through the overdrive pump gauze (because the 
> magnets originally fitted in the overdrive have been lost by " the 
> lube guy") and lodge in the accumulator.
> If you are careful to never grind 1st or reverse no chips will be 
> created, that will mean that they don't go through the laygear 
> bearings or find their way into the overdrive.
> On Thu., Aug. 4, 2022, 12:13 p.m. Warren Dietz, 
> <[email-masked]> wrote:
>
>     Bob,
>
>     Interesting observation.
>
>     Only 30/40 wt non detergent oil was used from new till 2013  at
>     which time I switched
>
>     Sent from Mail <https://go.microsoft.com/fwlink/?LinkId=550986>
>     for Windows
>
>     [email-masked]
>     Your accumulator piston and housing look to have a bit worse
>     scoring than mine; I used synthetic fluid for over half the life
>     of mine, I wonder if that made a difference?
>
>
>
>         Sent from Mail
>         <https://go.microsoft.com/fwlink/?LinkId=550986> for Windows
>
>         This was the condition of my piston and housing with close to
>         200,000 miles. Tranny was well maintained.
>
>         The original metal rings lasted 53 years. So I guess with
>         unknown quality of either of todays metal vs rubber
>
>         The rings will score the inside of the piston housing, though
>         not badly (photo at 205K miles). Looks like there's a side
>         load on the piston, probably from the spring.
>
>         they worked. Moss shows the rings available (but who knows?).
>
>             I assemble ODs using the original metal rings and have not
>             had any issues with pressure or engagement/disengagement.
>
>             When Mr. DeNormanville stayed up in the middle of the
>             night to engineer the operation of the unit,  I think he
>             decided that the use of softer rings (sacrificial metal)
>             against a hardened casing was the best solution for
>             control and wear.  If a rubber o-ring was a better
>             I think the bigger problem, now-a-days, is the
>             availability of the metal piston rings.  Rubber O rings
>             are a dime-a-dozen.  If you contact Overdrive Spares in
>             the UK, they should be able to supply the proper rings. 
>             If they too, have decided to go with rubber, then plan on
>             a breakdown/rebuild in a shorter period of time than units
>             The way the accumulator works is that when it is fully
>             charged the piston moves against the spring until the
>             rings reach the radial holes in the wall of the housing
>             which acts to relieve any excess pressure.
>
>             My concern is that at 3 - 400 p.s.i. oil will obviously
>             get behind the "O" ring and force the material of the "O"
>             ring into those radial holes and then, as the piston moves
>             back over them, a piece of the ring will shear off.
>
>             I'm guessing that Laycock-DeNormanville used the complex
>             recognized the possibility of this happening.
>
>             I'm sure that tiny pieces of the "O" ring would be found
>             in the filter if this was a problem. Anyone found them or
>             noticed damage to their accumulator "O" ring upon disassembly?
>
>             M
>
>             On Wed, Aug 3, 2022 at 9:08 AM Bob Spidell
>
>                 maybe a third off
>                 and disassembled,
>                 the reason DMH
>                 it, I might have
>                 be a bit awkward;
>                 engaging O/D, and
>                 mine engaged a little
>                 oil, but in all

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<html>
  <head>
    <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
  </head>
  <body>
    OK, who sells magnetic plugs for MOWOG gearboxes? I'd be willing to
    order from Canada ;)<br>
    <br>
    I don't remember exactly when I started using MT-90 in my gearbox,
    but it was probably around 90-100K miles. I was hoping it would make
    the O/D a bit more responsive, but was surprised that shifting
    seemed smoother (I wasn't expecting it, so little-no confirmation
    bias). <br>
    <br>
    <br>
    <div class="moz-cite-prefix">On 8/4/2022 9:38 AM, Michael Salter
      wrote:<br>
    </div>
    <blockquote type="cite"
cite="mid:[email-masked]">
      <meta http-equiv="content-type" content="text/html; charset=UTF-8">
      <div dir="auto">Based upon my observations when the aluminium
        overdrive accumulator housings are scored you will invariably
        find that there are chips out of the non syncro 1st and reverse
        gears and usually badly damaged laygear rollers.
        <div dir="auto">Because these gearboxes were not fitted with
          chip gathering magnet originally the tiny hardened steel chips
          eventually find their way into the overdrive then through the
          overdrive pump gauze (because the magnets originally fitted in
          the overdrive have been lost by " the lube guy") and lodge in
          the accumulator. </div>
        <div dir="auto">Those chips very quickly score the cylinder as
          the accumulator piston moves.</div>
        <div dir="auto">If you are careful to never grind 1st or reverse
          no chips will be created, that will mean that they don't go
          through the laygear bearings or find their way into the
          overdrive. </div>
        <div dir="auto">A magnetic plug in the gearbox is great
          insurance.</div>
        <div dir="auto"><br>
        </div>
        <div dir="auto">M</div>
      </div>
      <br>
      <div class="gmail_quote">
        <div dir="ltr" class="gmail_attr">On Thu., Aug. 4, 2022, 12:13
          p.m. Warren Dietz, &lt;<a href="mailto:[email-masked]"
            moz-do-not-send="true" class="moz-txt-link-freetext">[email-masked]</a>&gt;
          wrote:<br>
        </div>
        <blockquote class="gmail_quote" style="margin:0 0 0
          .8ex;border-left:1px #ccc solid;padding-left:1ex">
          <div link="blue" vlink="#954F72" style="word-wrap:break-word"
            lang="EN-US">
            <div class="m_-3387470703538253816WordSection1">
              <p class="MsoNormal">Bob,</p>
              <p class="MsoNormal">Interesting observation.</p>
              <p class="MsoNormal">Only 30/40 wt non detergent oil was
                used from new till 2013  at which time I switched</p>
              <p class="MsoNormal">to Redline MT90 @ 181,000 miles.</p>
              <p class="MsoNormal"> </p>
              <p class="MsoNormal">Sent from <a
                  href="https://go.microsoft.com/fwlink/?LinkId=550986"
                  target="_blank" rel="noreferrer"
                  moz-do-not-send="true">Mail</a> for Windows</p>
              <p class="MsoNormal"> </p>
              <div style="border:none;border-top:solid #e1e1e1
                1.0pt;padding:3.0pt 0in 0in 0in">
                <p class="MsoNormal" style="border:none;padding:0in"><b>From:
                  </b><a href="mailto:[email-masked]"
                    target="_blank" rel="noreferrer"
                    moz-do-not-send="true">Bob Spidell</a><br>
                  <b>Sent: </b>Thursday, August 4, 2022 9:38 AM<br>
                  <b>To: </b><a href="mailto:[email-masked]"
                    target="_blank" rel="noreferrer"
                    moz-do-not-send="true">Warren Dietz</a>; <a
                    href="mailto:[email-masked]" target="_blank"
                    rel="noreferrer" moz-do-not-send="true"
                    class="moz-txt-link-freetext">[email-masked]</a><br>
                  <b>Subject: </b>Re: [Healeys] DW overdrive piston</p>
              </div>
              <p class="MsoNormal"> </p>
              <p class="MsoNormal">Warren,<br>
                <br>
                Your accumulator piston and housing look to have a bit
                worse scoring than mine; I used synthetic fluid for over
                half the life of mine, I wonder if that made a
                difference?<br>
                <br>
                <br>
                <br>
              </p>
              <blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
                <p class="MsoNormal"> </p>
                <p class="MsoNormal"> </p>
                <p class="MsoNormal">Sent from <a
                    href="https://go.microsoft.com/fwlink/?LinkId=550986"
                    target="_blank" rel="noreferrer"
                    moz-do-not-send="true">Mail</a> for Windows</p>
                <p class="MsoNormal"> </p>
                <p class="MsoNormal">This was the condition of my piston
                  and housing with close to 200,000 miles. Tranny was
                  well maintained.</p>
                <p class="MsoNormal">The original metal rings lasted 53
                  years. So I guess with unknown quality of either of
                  todays metal vs rubber</p>
                <p class="MsoNormal">O rings, let the experiments begin.
                </p>
                <p class="MsoNormal"> </p>
                <p class="MsoNormal"> </p>
                <p class="MsoNormal"> </p>
                <div style="border:none;border-top:solid #e1e1e1
                  1.0pt;padding:3.0pt 0in 0in 0in">
                  <p class="MsoNormal"><b>From: </b><a
                      href="mailto:[email-masked]" target="_blank"
                      rel="noreferrer" moz-do-not-send="true">Bob
                      Spidell</a><br>
                    <b>Sent: </b>Wednesday, August 3, 2022 10:12 PM<br>
                    <b>To: </b><a href="mailto:[email-masked]"
                      target="_blank" rel="noreferrer"
                      moz-do-not-send="true"
                      class="moz-txt-link-freetext">[email-masked]</a><br>
                    <b>Subject: </b>Re: [Healeys] DW overdrive piston</p>
                </div>
                <p class="MsoNormal"> </p>
                <p class="MsoNormal" style="margin-bottom:12.0pt">The
                  rings will score the inside of the piston housing,
                  though not badly (photo at 205K miles). Looks like
                  there's a side load on the piston, probably from the
                  spring.<br>
                  <br>
                  I donated this accumulator to another owner; never
                  heard how they worked. Moss shows the rings available
                  (but who knows?).</p>
                <div>
                  <p class="MsoNormal">On 8/3/2022 12:36 PM, Henry G
                    Leach via Healeys wrote:</p>
                </div>
                <blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
                  <p class="MsoNormal">I assemble ODs using the original
                    metal rings and have not had any issues with
                    pressure or engagement/disengagement. </p>
                  <div>
                    <p class="MsoNormal"> </p>
                  </div>
                  <div>
                    <p class="MsoNormal">When Mr. DeNormanville stayed
                      up in the middle of the night to engineer the
                      operation of the unit,  I think he decided that
                      the use of softer rings (sacrificial metal)
                      against a hardened casing was the best solution
                      for control and wear.  If a rubber o-ring was a
                      better solution, he would have used one with the
                      proper buna rating.</p>
                  </div>
                  <div>
                    <p class="MsoNormal"> </p>
                  </div>
                  <div>
                    <p class="MsoNormal" style="margin-bottom:12.0pt">I
                      think the bigger problem, now-a-days, is the
                      availability of the metal piston rings.  Rubber O
                      rings are a dime-a-dozen.  If you contact
                      Overdrive Spares in the UK, they should be able to
                      supply the proper rings.  If they too, have
                      decided to go with rubber, then plan on a
                      breakdown/rebuild in a shorter period of time than
                      units equipped with the original parts that last a
                      long, long time. Hank</p>
                    <p>-----------------------------------------</p>
                    <p class="MsoNormal" style="margin-bottom:12.0pt">From:
                      "Michael Salter" <br>
                      To: <a href="mailto:[email-masked]"
                        target="_blank" rel="noreferrer"
                        moz-do-not-send="true">"[email-masked]"</a><br>
                      Cc: <br>
                      Sent: Wednesday August 3 2022 9:38:15AM<br>
                      Subject: Re: [Healeys] DW overdrive piston</p>
                    <div>
                      <div>
                        <p class="MsoNormal"><span
                            style="font-size:12.0pt;font-family:&quot;Arial&quot;,sans-serif">I
                            have a question about the "O" ring type of
                            accumulator.</span></p>
                      </div>
                      <div>
                        <p class="MsoNormal"><span
                            style="font-size:12.0pt;font-family:&quot;Arial&quot;,sans-serif">The
                            way the accumulator works is that when it is
                            fully charged the piston moves against the
                            spring until the rings reach the radial
                            holes in the wall of the housing which acts
                            to relieve any excess pressure.</span></p>
                      </div>
                      <div>
                        <p class="MsoNormal"><span
                            style="font-size:12.0pt;font-family:&quot;Arial&quot;,sans-serif">My
                            concern is that at 3 - 400 p.s.i. oil will
                            obviously get behind the "O" ring and force
                            the material of the "O" ring into those
                            radial holes and then, as the piston moves
                            back over them, a piece of the ring will
                            shear off.</span></p>
                      </div>
                      <div>
                        <p class="MsoNormal"><span
                            style="font-size:12.0pt;font-family:&quot;Arial&quot;,sans-serif">I'm
                            guessing that Laycock-DeNormanville used the
                            complex cast iron rings rather than "O"
                            rings because they recognized the
                            possibility of this happening.</span></p>
                      </div>
                      <div>
                        <p class="MsoNormal"><span
                            style="font-size:12.0pt;font-family:&quot;Arial&quot;,sans-serif">I'm
                            sure that tiny pieces of the "O" ring would
                            be found in the filter if this was a
                            problem. Anyone found them or noticed damage
                            to their accumulator "O" ring upon
                            disassembly?</span></p>
                      </div>
                      <div>
                        <p class="MsoNormal"><span
                            style="font-size:12.0pt;font-family:&quot;Arial&quot;,sans-serif"> </span></p>
                      </div>
                      <div>
                        <p class="MsoNormal"><span
                            style="font-size:12.0pt;font-family:&quot;Arial&quot;,sans-serif">M</span></p>
                      </div>
                      <div>
                        <p class="MsoNormal"><span
                            style="font-size:12.0pt;font-family:&quot;Arial&quot;,sans-serif"> </span></p>
                      </div>
                    </div>
                    <p class="MsoNormal"> </p>
                    <div>
                      <div>
                        <p class="MsoNormal">On Wed, Aug 3, 2022 at 9:08
                          AM Bob Spidell <a
                            href="mailto:[email-masked]"
                            target="_blank" rel="noreferrer"
                            moz-do-not-send="true">&lt;[email-masked]&gt;</a>
                          wrote:</p>
                      </div>
                      <blockquote style="border:none;border-left:solid
                        #cccccc 1.0pt;padding:0in 0in 0in
6.0pt;margin-left:4.8pt;margin-top:5.0pt;margin-right:0in;margin-bottom:5.0pt">
                        <p class="MsoNormal"
                          style="margin-right:0in;margin-bottom:12.0pt;margin-left:153.6pt">I
                          put one in my BJ8's O/D. It's
                          subjective*--O/Ds seem to work a little<br>
                          quicker with cold, thick oil than hot oil--but
                          it cuts maybe a third off<br>
                          engagement time on average. I had the O/D on
                          the bench and disassembled,<br>
                          and the current one had a scored barrel so,
                          why not? Engagement isn't<br>
                          much, if any, harsher than before which, I
                          believe is the reason DMH<br>
                          wanted the weaker, smaller spring. If I'd
                          known about it, I might have<br>
                          bought AHSpares' with an O-ring instead.<br>
                          <br>
                          * I've never really 'timed' O/D functioning,
                          it would be a bit awkward;<br>
                          anyone done it? I usually tap the clutch pedal
                          when engaging O/D, and<br>
                          give a little throttle when disengaging. I
                          thought mine engaged a little<br>
                          quicker when I switched to synthetic fluid
                          from engine oil, but in all<br>
                          cases confirmation bias may be involved.<br>
                          <br>
                          <br>
                          <br>
                          On 8/2/2022 8:09 PM, Joseph Costa wrote:<br>
                          &gt; Has anyone installed their upgraded
                          overdrive piston?  If so, is it<br>
                          &gt; worth the trouble ?<br>
                          &gt;<br>
                          &gt; Joe<br>
                          &gt; BN1 #923<br>
                          &gt;</p>
                      </blockquote>
                    </div>
                  </div>
                </blockquote>
                <br>
              </blockquote>
            </div>
          </div>
        </blockquote>
      </div>
    </blockquote>
    <br>
  </body>
</html>

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[email-masked]

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---

From: Simon Lachlan via Healeys <[email-masked]>
Date: Thu, 4 Aug 2022 21:45:19 +0100 boundary="----=_NextPart_000_0001_01D8A84B.856EBBF0"

This is a multipart message in MIME format.

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=20

=20

From: Healeys <> On Behalf Of Bob Spidell
Sent: 04 August 2022 18:13
To: Michael Salter <[email-masked]>; Warren Dietz =
<[email-masked]>
Cc: [email-masked]
Subject: Re: [Healeys] DW overdrive piston

=20

OK, who sells magnetic plugs for MOWOG gearboxes? I'd be willing to =
order from Canada=20

>> See attached.  I replaced the so-called =E2=80=9C2nd type=E2=80=9D =
with the previous type which is the brass hex nut with filter which =
bolts into a bolt in the bottom of the pump. (I think that big flat plug =
in the 2nd type is a wretched thing. Why did they do it? The hex is much =
easier.)

Once you=E2=80=99ve got that sorted out you can buy 2 or 3 of the =
magnetic rings that sit in there. Per:- MAGNETIC WASHER - DRAIN PLUG =
(ahead4healeys.co.uk) =
<https://www.ahead4healeys.co.uk/MAGNETIC-WASHER---DRAIN-PLUG-id3338.aspx=
>=20

As to overdrive pistons, I had a fairly torrid time with those quite =
recently. I should be inclined to ask Dave Twigger at Overdrive Spares. =
I=E2=80=99m pretty sure that he sells all types ie the AHSpares version, =
the original type and =E2=80=93 I think =E2=80=93 the DW type. He =
supplies them to all and sundry. Ask him which he thinks is best for =
your application.=20

I didn=E2=80=99t see the washer inside the piston casing in any of the =
photos. Most people insert them these days and I think they claim an =
extra 20 or so PSI.

Simon

=20

=20

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vlink=3Dpurple><div class=3DWordSection1><p class=3DMsoNormal><span =
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class=3DMsoNormal><span =
style=3D'mso-fareast-language:EN-US'><o:p>&nbsp;</o:p></span></p><div><di=
v style=3D'border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0cm =
0cm 0cm'><p class=3DMsoNormal><b><span =
lang=3DEN-US>From:</span></b><span lang=3DEN-US> Healeys &lt;&gt; <b>On =
Behalf Of </b>Bob Spidell<br><b>Sent:</b> 04 August 2022 =
18:13<br><b>To:</b> Michael Salter &lt;[email-masked]&gt;; =
Warren Dietz &lt;[email-masked]&gt;<br><b>Cc:</b> =
[email-masked]<br><b>Subject:</b> Re: [Healeys] DW overdrive =
piston<o:p></o:p></span></p></div></div><p =
class=3DMsoNormal><o:p>&nbsp;</o:p></p><p class=3DMsoNormal =
style=3D'margin-bottom:12.0pt'>OK, who sells magnetic plugs for MOWOG =
gearboxes? I'd be willing to order from Canada <br><br><span =
lang=3DEN-US>&gt;&gt; See attached. =C2=A0I replaced the so-called =
=E2=80=9C2<sup>nd</sup> type=E2=80=9D with the previous type which is =
the brass hex nut with filter which bolts into a bolt in the bottom of =
the pump. (I think that big flat plug in the 2<sup>nd</sup> type is a =
wretched thing. Why did they do it? The hex is much =
easier.)<o:p></o:p></span></p><p class=3DMsoNormal =
style=3D'margin-bottom:12.0pt'><span lang=3DEN-US>Once you=E2=80=99ve =
got that sorted out you can buy 2 or 3 of the magnetic rings that sit in =
there. Per:- </span><a =
href=3D"https://www.ahead4healeys.co.uk/MAGNETIC-WASHER---DRAIN-PLUG-id33=
38.aspx">MAGNETIC WASHER - DRAIN PLUG =
(ahead4healeys.co.uk)</a><o:p></o:p></p><p class=3DMsoNormal =
style=3D'margin-bottom:12.0pt'>As to overdrive pistons, I had a fairly =
torrid time with those quite recently. I should be inclined to ask Dave =
Twigger at Overdrive Spares. I=E2=80=99m pretty sure that he sells all =
types ie the AHSpares version, the original type and =E2=80=93 I think =
=E2=80=93 the DW type. He supplies them to all and sundry. Ask him which =
he thinks is best for your application. <o:p></o:p></p><p =
class=3DMsoNormal style=3D'margin-bottom:12.0pt'>I didn=E2=80=99t see =
the washer inside the piston casing in any of the photos. Most people =
insert them these days and I think they claim an extra 20 or so =
PSI.<o:p></o:p></p><p class=3DMsoNormal =
style=3D'margin-bottom:12.0pt'>Simon<o:p></o:p></p><p class=3DMsoNormal =
style=3D'margin-bottom:12.0pt'><span =
lang=3DEN-US><o:p>&nbsp;</o:p></span></p><p =
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[email-masked]

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---

From: Michael Salter via Healeys <[email-masked]>
Date: Thu, 4 Aug 2022 16:57:56 -0400

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I've never seen them for sale. I mill a 3/8" depression in the business end
of the original plug and squeeze a small disc magnet into it using J B Weld
for extra security.

M

On Thu., Aug. 4, 2022, 4:45 p.m. , <[email-masked]>
wrote:

>
>
>
>
> *From:* Healeys <> *On Behalf Of *Bob Spidell
> *Sent:* 04 August 2022 18:13
> *To:* Michael Salter <[email-masked]>; Warren Dietz <
> [email-masked]>
> *Cc:* [email-masked]
> *Subject:* Re: [Healeys] DW overdrive piston
>
>
>
> OK, who sells magnetic plugs for MOWOG gearboxes? I'd be willing to order
> from Canada
>
> >> See attached.  I replaced the so-called =E2=80=9C2nd type=E2=80=9D wit=
h the previous
> type which is the brass hex nut with filter which bolts into a bolt in th=
e
> bottom of the pump. (I think that big flat plug in the 2nd type is a
> wretched thing. Why did they do it? The hex is much easier.)
>
> Once you=E2=80=99ve got that sorted out you can buy 2 or 3 of the magneti=
c rings
> that sit in there. Per:- MAGNETIC WASHER - DRAIN PLUG
> (ahead4healeys.co.uk)
> As to overdrive pistons, I had a fairly torrid time with those quite
> recently. I should be inclined to ask Dave Twigger at Overdrive Spares. I=
=E2=80=99m
> pretty sure that he sells all types ie the AHSpares version, the original
> type and =E2=80=93 I think =E2=80=93 the DW type. He supplies them to all=
 and sundry. Ask
> him which he thinks is best for your application.
>
> I didn=E2=80=99t see the washer inside the piston casing in any of the ph=
otos.
> Most people insert them these days and I think they claim an extra 20 or =
so
> PSI.

--0000000000004e567105e5709bbb
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<div dir=3D"auto">I&#39;ve never seen them for sale. I mill a 3/8&quot; dep=
ression in the business end of the original plug and squeeze a small disc m=
agnet into it using J B Weld for extra security.<div dir=3D"auto"><br></div=
><div dir=3D"auto">M</div></div><br><div class=3D"gmail_quote"><div dir=3D"=
ltr" class=3D"gmail_attr">On Thu., Aug. 4, 2022, 4:45 p.m. , &lt;<a href=3D=
"mailto:[email-masked]">[email-masked]=
m</a>&gt; wrote:<br></div><blockquote class=3D"gmail_quote" style=3D"margin=
:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div lang=3D"EN-GB=
" link=3D"blue" vlink=3D"purple"><div class=3D"m_189023178996911941WordSect=
ion1"><p class=3D"MsoNormal"><span><u></u>=C2=A0<u></u></span></p><p class=
=3D"MsoNormal"><span><u></u>=C2=A0<u></u></span></p><div><div style=3D"bord=
er:none;border-top:solid #e1e1e1 1.0pt;padding:3.0pt 0cm 0cm 0cm"><p class=
=3D"MsoNormal"><b><span lang=3D"EN-US">From:</span></b><span lang=3D"EN-US"=
> Healeys &lt;&gt; <b>On Behalf Of </b>Bob Spidell<br><b>Sent:</b> 04 Augus=
t 2022 18:13<br><b>To:</b> Michael Salter &lt;<a href=3D"mailto:michaelsalt=
[email-masked]" target=3D"_blank" rel=3D"noreferrer">[email-masked]<=
/a>&gt;; Warren Dietz &lt;<a href=3D"mailto:[email-masked]" target=
=3D"_blank" rel=3D"noreferrer">[email-masked]</a>&gt;<br><b>Cc:</b> =
<a href=3D"mailto:[email-masked]" target=3D"_blank" rel=3D"noreferr=
er">[email-masked]</a><br><b>Subject:</b> Re: [Healeys] DW overdriv=
e piston<u></u><u></u></span></p></div></div><p class=3D"MsoNormal"><u></u>=
=C2=A0<u></u></p><p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt">OK, =
who sells magnetic plugs for MOWOG gearboxes? I&#39;d be willing to order f=
rom Canada <br><br><span lang=3D"EN-US">&gt;&gt; See attached.=C2=A0 I repl=
aced the so-called =E2=80=9C2<sup>nd</sup> type=E2=80=9D with the previous =
type which is the brass hex nut with filter which bolts into a bolt in the =
bottom of the pump. (I think that big flat plug in the 2<sup>nd</sup> type =
is a wretched thing. Why did they do it? The hex is much easier.)<u></u><u>=
</u></span></p><p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt"><span =
lang=3D"EN-US">Once you=E2=80=99ve got that sorted out you can buy 2 or 3 o=
f the magnetic rings that sit in there. Per:- </span><a href=3D"https://www=
.ahead4healeys.co.uk/MAGNETIC-WASHER---DRAIN-PLUG-id3338.aspx" target=3D"_b=
lank" rel=3D"noreferrer">MAGNETIC WASHER - DRAIN PLUG (ahead4healeys.co.uk)=
</a><u></u><u></u></p><p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt"=
>As to overdrive pistons, I had a fairly torrid time with those quite recen=
tly. I should be inclined to ask Dave Twigger at Overdrive Spares. I=E2=80=
=99m pretty sure that he sells all types ie the AHSpares version, the origi=
nal type and =E2=80=93 I think =E2=80=93 the DW type. He supplies them to a=
ll and sundry. Ask him which he thinks is best for your application. <u></u=
><u></u></p><p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt">I didn=E2=
=80=99t see the washer inside the piston casing in any of the photos. Most =
people insert them these days and I think they claim an extra 20 or so PSI.=
<u></u><u></u></p><p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt">Sim=
on<u></u><u></u></p><p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt"><=
span lang=3D"EN-US"><u></u>=C2=A0<u></u></span></p><p class=3D"MsoNormal"><=
u></u>=C2=A0<u></u></p></div></div></blockquote></div>

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---

From: Bob Haskell <[email-masked]>
Date: Thu, 4 Aug 2022 17:27:55 -0400

Might be something here that would work: 
https://www.lislecorp.com/oem-products-division/magnetic-plugs/pipe-thread/

Cheers,

Bob Haskell
Austin Healey 3000 BN7/BT7 registrar

On 8/4/22 1:12 PM, Bob Spidell wrote:
> it was probably around 90-100K miles. I was hoping it would make the 
> O/D a bit more responsive, but was surprised that shifting seemed 
> smoother (I wasn't expecting it, so little-no confirmation bias).
>
>
>>     *From: *Bob Spidell <mailto:[email-masked]>
>>     *To: *Warren Dietz <mailto:[email-masked]>;
>>     [email-masked]
>>         *From: *Bob Spidell <mailto:[email-masked]>
>>             I assemble ODs using the original metal rings and have
>>             not had any issues with pressure or
>>             engagement/disengagement.
>>
>>             a breakdown/rebuild in a shorter period of time than
>>             units equipped with the original parts that last a long,
>>             long time. Hank
>>
>>             To: "[email-masked]" <mailto:[email-masked]>
>>             Cc:
>>             ring into those radial holes and then, as the piston
>>             moves back over them, a piece of the ring will shear off.
>>
>>             <[email-masked]> <mailto:[email-masked]> wrote:
>>
> Unsubscribe/Manage: http://autox.team.net/mailman/options/healeys/[email-masked]
>

[email-masked]

Unsubscribe/Manage: http://autox.team.net/mailman/options/healeys/[email-masked]

---

From: Bob Spidell <[email-masked]>
Date: Thu, 4 Aug 2022 16:24:02 -0700

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Perhaps one of the exotic metal, 'high-strength' magnets just slapped on 
the outside of the plug? People sell magnet bands to go around spin-on 
oil filters.

On 8/4/2022 1:57 PM, Michael Salter wrote:
> I've never seen them for sale. I mill a 3/8" depression in the 
> business end of the original plug and squeeze a small disc magnet into 
> it using J B Weld for extra security.
>
> M
>
>     *From:*Healeys <> *On Behalf Of *Bob Spidell
>     *To:* Michael Salter <[email-masked]>; Warren Dietz
>     <[email-masked]>
>     OK, who sells magnetic plugs for MOWOG gearboxes? I'd be willing
>     to order from Canada
>
>     >> See attached.  I replaced the so-called “2^nd type” with the previous type which is the
>     brass hex nut with filter which bolts into a bolt in the bottom of
>     the pump. (I think that big flat plug in the 2^nd type is a
>     Once you’ve got that sorted out you can buy 2 or 3 of the magnetic
>     rings that sit in there. Per:- MAGNETIC WASHER - DRAIN PLUG
>     (ahead4healeys.co.uk)
>     <https://www.ahead4healeys.co.uk/MAGNETIC-WASHER---DRAIN-PLUG-id3338.aspx>
>
>     As to overdrive pistons, I had a fairly torrid time with those
>     quite recently. I should be inclined to ask Dave Twigger at
>     Overdrive Spares. I’m pretty sure that he sells all types ie the
>     AHSpares version, the original type and – I think – the DW type.
>     He supplies them to all and sundry. Ask him which he thinks is
>     best for your application.
>
>     I didn’t see the washer inside the piston casing in any of the
>     photos. Most people insert them these days and I think they claim
>     an extra 20 or so PSI.
>
>     Simon
>

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    Perhaps one of the exotic metal, 'high-strength' magnets just
    slapped on the outside of the plug? People sell magnet bands to go
    around spin-on oil filters.<br>
    <br>
    <br>
    <br>
    <div class="moz-cite-prefix">On 8/4/2022 1:57 PM, Michael Salter
      wrote:<br>
    </div>
    <blockquote type="cite"
cite="mid:CAB3i7LJmKbdszbj5xRr==O4M=n0OX28FhSK++Kfw-C=[email-masked]">
      <meta http-equiv="content-type" content="text/html; charset=UTF-8">
      <div dir="auto">I've never seen them for sale. I mill a 3/8"
        depression in the business end of the original plug and squeeze
        a small disc magnet into it using J B Weld for extra security.
        <div dir="auto"><br>
        </div>
        <div dir="auto">M</div>
      </div>
      <br>
      <div class="gmail_quote">
        <div dir="ltr" class="gmail_attr">On Thu., Aug. 4, 2022, 4:45
          p.m. , &lt;<a href="mailto:[email-masked]"
            moz-do-not-send="true" class="moz-txt-link-freetext">[email-masked]</a>&gt;
          wrote:<br>
        </div>
        <blockquote class="gmail_quote" style="margin:0 0 0
          .8ex;border-left:1px #ccc solid;padding-left:1ex">
          <div link="blue" vlink="purple" lang="EN-GB">
            <div class="m_189023178996911941WordSection1">
              <p class="MsoNormal"><span> </span></p>
              <p class="MsoNormal"><span> </span></p>
              <div>
                <div style="border:none;border-top:solid #e1e1e1
                  1.0pt;padding:3.0pt 0cm 0cm 0cm">
                  <p class="MsoNormal"><b><span lang="EN-US">From:</span></b><span
                      lang="EN-US"> Healeys &lt;&gt; <b>On Behalf Of </b>Bob
                      Spidell<br>
                      <b>Sent:</b> 04 August 2022 18:13<br>
                      <b>To:</b> Michael Salter &lt;<a
                        href="mailto:[email-masked]"
                        target="_blank" rel="noreferrer"
                        moz-do-not-send="true"
                        class="moz-txt-link-freetext">[email-masked]</a>&gt;;
                      Warren Dietz &lt;<a
                        href="mailto:[email-masked]"
                        target="_blank" rel="noreferrer"
                        moz-do-not-send="true"
                        class="moz-txt-link-freetext">[email-masked]</a>&gt;<br>
                      <b>Cc:</b> <a
                        href="mailto:[email-masked]"
                        target="_blank" rel="noreferrer"
                        moz-do-not-send="true"
                        class="moz-txt-link-freetext">[email-masked]</a><br>
                      <b>Subject:</b> Re: [Healeys] DW overdrive piston</span></p>
                </div>
              </div>
              <p class="MsoNormal"> </p>
              <p class="MsoNormal" style="margin-bottom:12.0pt">OK, who
                sells magnetic plugs for MOWOG gearboxes? I'd be willing
                to order from Canada <br>
                <br>
                <span lang="EN-US">&gt;&gt; See attached.  I replaced
                  the so-called “2<sup>nd</sup> type” with the previous
                  type which is the brass hex nut with filter which
                  bolts into a bolt in the bottom of the pump. (I think
                  that big flat plug in the 2<sup>nd</sup> type is a
                  wretched thing. Why did they do it? The hex is much
                  easier.)</span></p>
              <p class="MsoNormal" style="margin-bottom:12.0pt"><span
                  lang="EN-US">Once you’ve got that sorted out you can
                  buy 2 or 3 of the magnetic rings that sit in there.
                  Per:- </span><a
href="https://www.ahead4healeys.co.uk/MAGNETIC-WASHER---DRAIN-PLUG-id3338.aspx"
                  target="_blank" rel="noreferrer"
                  moz-do-not-send="true">MAGNETIC WASHER - DRAIN PLUG
                  (ahead4healeys.co.uk)</a></p>
              <p class="MsoNormal" style="margin-bottom:12.0pt">As to
                overdrive pistons, I had a fairly torrid time with those
                quite recently. I should be inclined to ask Dave Twigger
                at Overdrive Spares. I’m pretty sure that he sells all
                types ie the AHSpares version, the original type and – I
                think – the DW type. He supplies them to all and sundry.
                Ask him which he thinks is best for your application. </p>
              <p class="MsoNormal" style="margin-bottom:12.0pt">I didn’t
                see the washer inside the piston casing in any of the
                photos. Most people insert them these days and I think
                they claim an extra 20 or so PSI.</p>
              <p class="MsoNormal" style="margin-bottom:12.0pt">Simon</p>
              <p class="MsoNormal" style="margin-bottom:12.0pt"><span
                  lang="EN-US"> </span></p>
              <p class="MsoNormal"> </p>
            </div>
          </div>
        </blockquote>
      </div>
    </blockquote>
    <br>
  </body>
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[email-masked]

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---

From: Jean Caron <[email-masked]>
Date: Fri, 5 Aug 2022 03:52:00 +0000

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	boundary="_000_DS7PR11MB6078845FCF355D62A9439CC7D19E9DS7PR11MB6078namp_"

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Bob,
AH Spares sells a magnetic washer for the overdrive. I have often seen, mos=
tly on the late model overdrive three or four magnetic washers inside the b=
rass drain plug, but they were of the flexible type, very much like thick f=
ridge magnet that yu get from Real Estate Agent or the likes. You can purch=
ase that stuff by the sheet at Staples in various thickness, so that is wha=
t I have done in the past and it seems to work.

Jean

Sent from Mail<https://go.microsoft.com/fwlink/?LinkId=3D550986> for Window=
s

Sent: August 4, 2022 9:26 PM
[email-masked]>
Subject: Re: [Healeys] DW overdrive piston

Perhaps one of the exotic metal, 'high-strength' magnets just slapped on th=
e outside of the plug? People sell magnet bands to go around spin-on oil fi=
lters.

On 8/4/2022 1:57 PM, Michael Salter wrote:
I've never seen them for sale. I mill a 3/8" depression in the business end=
 of the original plug and squeeze a small disc magnet into it using J B Wel=
d for extra security.

M

On Thu., Aug. 4, 2022, 4:45 p.m. , <[email-masked]<mailt=
o:[email-masked]>> wrote:

OK, who sells magnetic plugs for MOWOG gearboxes? I'd be willing to order f=
rom Canada

>> See attached.  I replaced the so-called =932nd type=94 with the previous=
 type which is the brass hex nut with filter which bolts into a bolt in the=
 bottom of the pump. (I think that big flat plug in the 2nd type is a wretc=
hed thing. Why did they do it? The hex is much easier.)
Once you=92ve got that sorted out you can buy 2 or 3 of the magnetic rings =
that sit in there. Per:- MAGNETIC WASHER - DRAIN PLUG (ahead4healeys.co.uk)=
<https://nam12.safelinks.protection.outlook.com/?url=3Dhttps%3A%2F%2Fwww.ah=
ead4healeys.co.uk%2FMAGNETIC-WASHER---DRAIN-PLUG-id3338.aspx&data=3D05%7C01=
%7C%7C244dc597ca814aa6cd6a08da7689f235%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7=
C1%7C0%7C637952632097954449%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJ=
QIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=3DLlAeo6M=
s4xspLF3Yrc8hpjQu61fkNHmwaNTGRdqDnUQ%3D&reserved=3D0>
As to overdrive pistons, I had a fairly torrid time with those quite recent=
ly. I should be inclined to ask Dave Twigger at Overdrive Spares. I=92m pre=
tty sure that he sells all types ie the AHSpares version, the original type=
 and =96 I think =96 the DW type. He supplies them to all and sundry. Ask h=
im which he thinks is best for your application.
I didn=92t see the washer inside the piston casing in any of the photos. Mo=
st people insert them these days and I think they claim an extra 20 or so P=
SI.
Simon

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ak-word">
<div class=3D"WordSection1">
<p class=3D"MsoNormal">Bob,</p>
<p class=3D"MsoNormal">AH Spares sells a magnetic washer for the overdrive.=
 I have often seen, mostly on the late model overdrive three or four magnet=
ic washers inside the brass drain plug, but they were of the flexible type,=
 very much like thick fridge magnet
 that yu get from Real Estate Agent or the likes. You can purchase that stu=
ff by the sheet at Staples in various thickness, so that is what I have don=
e in the past and it seems to work.
</p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">Jean</p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">Sent from <a href=3D"https://go.microsoft.com/fwlink=
/?LinkId=3D550986">
Mail</a> for Windows</p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<div style=3D"mso-element:para-border-div;border:none;border-top:solid #E1E=
1E1 1.0pt;padding:3.0pt 0cm 0cm 0cm">
<p class=3D"MsoNormal" style=3D"border:none;padding:0cm"><b>From: </b><a hr=
ef=3D"mailto:[email-masked]">Bob Spidell</a><br>
<b>Sent: </b>August 4, 2022 9:26 PM<br>
<b>To: </b><a href=3D"mailto:[email-masked]">Michael Salter</a>; <=
a href=3D"mailto:[email-masked]">
Simon Lachlan</a><br>
<b>Cc: </b><a href=3D"mailto:[email-masked]">[email-masked]=
</a><br>
<b>Subject: </b>Re: [Healeys] DW overdrive piston</p>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt">Perhaps one of the ex=
otic metal, 'high-strength' magnets just slapped on the outside of the plug=
? People sell magnet bands to go around spin-on oil filters.<br>
<br>
<br>
<o:p></o:p></p>
<div>
<p class=3D"MsoNormal">On 8/4/2022 1:57 PM, Michael Salter wrote:<o:p></o:p=
></p>
</div>
<blockquote style=3D"margin-top:5.0pt;margin-bottom:5.0pt">
<div>
<p class=3D"MsoNormal">I've never seen them for sale. I mill a 3/8&quot; de=
pression in the business end of the original plug and squeeze a small disc =
magnet into it using J B Weld for extra security.
<o:p></o:p></p>
<div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
</div>
<div>
<p class=3D"MsoNormal">M<o:p></o:p></p>
</div>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<div>
<div>
<p class=3D"MsoNormal">On Thu., Aug. 4, 2022, 4:45 p.m. , &lt;<a href=3D"ma=
ilto:[email-masked]">[email-masked]</=
a>&gt; wrote:<o:p></o:p></p>
</div>
<blockquote style=3D"border:none;border-left:solid #CCCCCC 1.0pt;padding:0c=
m 0cm 0cm 6.0pt;margin-left:4.8pt;margin-right:0cm">
<div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span lang=3D"EN-GB">&nbsp;<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span lang=3D"EN-GB">&nbsp;<o:p></o:p></span></p>
<div>
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0cm =
0cm 0cm">
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><b><span lang=3D"EN-US">From:</span></b><span lang=3D"EN-US"> Heal=
eys &lt;&gt;
<b>On Behalf Of </b>Bob Spidell<br>
<b>Sent:</b> 04 August 2022 18:13<br>
<b>To:</b> Michael Salter &lt;<a href=3D"mailto:[email-masked]" ta=
rget=3D"_blank">[email-masked]</a>&gt;; Warren Dietz &lt;<a href=
=3D"mailto:[email-masked]" target=3D"_blank">[email-masked]</=
a>&gt;<br>
<b>Cc:</b> <a href=3D"mailto:[email-masked]" target=3D"_blank">heal=
[email-masked]</a><br>
<b>Subject:</b> Re: [Healeys] DW overdrive piston</span><span lang=3D"EN-GB=
"><o:p></o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span lang=3D"EN-GB">&nbsp;<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;margin-bottom:12.0p=
t"><span lang=3D"EN-GB">OK, who sells magnetic plugs for MOWOG gearboxes? I=
'd be willing to order from Canada
<br>
<br>
</span><span lang=3D"EN-US">&gt;&gt; See attached.&nbsp; I replaced the so-=
called =932<sup>nd</sup> type=94 with the previous type which is the brass =
hex nut with filter which bolts into a bolt in the bottom of the pump. (I t=
hink that big flat plug in the 2<sup>nd</sup> type
 is a wretched thing. Why did they do it? The hex is much easier.)</span><s=
pan lang=3D"EN-GB"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;margin-bottom:12.0p=
t"><span lang=3D"EN-US">Once you=92ve got that sorted out you can buy 2 or =
3 of the magnetic rings that sit in there. Per:-
</span><span lang=3D"EN-GB"><a href=3D"https://nam12.safelinks.protection.o=
utlook.com/?url=3Dhttps%3A%2F%2Fwww.ahead4healeys.co.uk%2FMAGNETIC-WASHER--=
-DRAIN-PLUG-id3338.aspx&amp;data=3D05%7C01%7C%7C244dc597ca814aa6cd6a08da768=
9f235%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C637952632097954449%7CUnk=
nown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJX=
VCI6Mn0%3D%7C3000%7C%7C%7C&amp;sdata=3DLlAeo6Ms4xspLF3Yrc8hpjQu61fkNHmwaNTG=
RdqDnUQ%3D&amp;reserved=3D0" target=3D"_blank">MAGNETIC
 WASHER - DRAIN PLUG (ahead4healeys.co.uk)</a><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;margin-bottom:12.0p=
t"><span lang=3D"EN-GB">As to overdrive pistons, I had a fairly torrid time=
 with those quite recently. I should be inclined to ask Dave Twigger at Ove=
rdrive Spares. I=92m pretty sure that he
 sells all types ie the AHSpares version, the original type and =96 I think=
 =96 the DW type. He supplies them to all and sundry. Ask him which he thin=
ks is best for your application.
<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;margin-bottom:12.0p=
t"><span lang=3D"EN-GB">I didn=92t see the washer inside the piston casing =
in any of the photos. Most people insert them these days and I think they c=
laim an extra 20 or so PSI.<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;margin-bottom:12.0p=
t"><span lang=3D"EN-GB">Simon<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;margin-bottom:12.0p=
t"><span lang=3D"EN-US">&nbsp;</span><span lang=3D"EN-GB"><o:p></o:p></span=
></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span lang=3D"EN-GB">&nbsp;<o:p></o:p></span></p>
</div>
</div>
</blockquote>
</div>
</blockquote>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
</div>
</body>
</html>

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[email-masked]

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---

From: ahbn6--- via Healeys <[email-masked]>
Date: Thu, 4 Aug 2022 20:50:41 -0400

Look at the Moss catalogue. They are listed there. I had them om my bn6 (which had a tranny out of a BJ8))

John Sims
www.healey6.com
Matawan, NJ

-----Original Message-----
From: Healeys <[email-masked]> On Behalf Of Bob Haskell
Sent: Thursday, August 4, 2022 5:28 PM
To: Bob Spidell <[email-masked]>; Michael Salter <[email-masked]>; Warren Dietz <[email-masked]>
Cc: [email-masked]
Subject: Re: [Healeys] DW overdrive piston

Cheers,

Bob Haskell

On 8/4/22 1:12 PM, Bob Spidell wrote:
> Support Team.Net http://www.team.net/donate.html Suggested annual 
> donation  $12.75
>
> http://autox.team.net/mailman/options/healeys/[email-masked]
>

[email-masked]

[email-masked]

---

From: Bob Spidell <[email-masked]>
Date: Fri, 5 Aug 2022 06:32:05 -0700

This is a multi-part message in MIME format.
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Hi Jean,

I think Michael was referring to a magnetic plug for the gearbox; 
presumably, this would keep some of the swarf from chipped gears from 
getting to the O/D. I have the flexible magnets in the O/D plug.

Bob

//
On 8/4/2022 8:52 PM, Jean Caron wrote:
>
> Bob,
>
> AH Spares sells a magnetic washer for the overdrive. I have often 
> seen, mostly on the late model overdrive three or four magnetic 
> washers inside the brass drain plug, but they were of the flexible 
> type, very much like thick fridge magnet that yu get from Real Estate 
> Agent or the likes. You can purchase that stuff by the sheet at 
> Staples in various thickness, so that is what I have done in the past 
> and it seems to work.
>
> Jean
>
> *Sent: *August 4, 2022 9:26 PM
> *Cc: [email-masked]
> Perhaps one of the exotic metal, 'high-strength' magnets just slapped 
> on the outside of the plug? People sell magnet bands to go around 
> spin-on oil filters.
>
>
>     business end of the original plug and squeeze a small disc magnet
>     into it using J B Weld for extra security.
>
>     M
>
>     On Thu., Aug. 4, 2022, 4:45 p.m. ,
>     <[email-masked]> wrote:
>
>         OK, who sells magnetic plugs for MOWOG gearboxes? I'd be
>         willing to order from Canada
>
>         >> See attached.  I replaced the so-called “2^nd type” with the previous type
>         which is the brass hex nut with filter which bolts into a bolt
>         in the bottom of the pump. (I think that big flat plug in the
>         2^nd type is a wretched thing. Why did they do it? The hex is
>         much easier.)
>
>         Once you’ve got that sorted out you can buy 2 or 3 of the
>         magnetic rings that sit in there. Per:- MAGNETIC WASHER -
>         DRAIN PLUG (ahead4healeys.co.uk)
>         <https://nam12.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.ahead4healeys.co.uk%2FMAGNETIC-WASHER---DRAIN-PLUG-id3338.aspx&data=05%7C01%7C%7C244dc597ca814aa6cd6a08da7689f235%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C637952632097954449%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=LlAeo6Ms4xspLF3Yrc8hpjQu61fkNHmwaNTGRdqDnUQ%3D&reserved=0>
>
>         Overdrive Spares. I’m pretty sure that he sells all types ie
>         the AHSpares version, the original type and – I think – the DW
>         type. He supplies them to all and sundry. Ask him which he
>         thinks is best for your application.
>
>         photos. Most people insert them these days and I think they
>         claim an extra 20 or so PSI.
>
>         Simon
>

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    Hi Jean,<br>
    <br>
    I think Michael was referring to a magnetic plug for the gearbox;
    presumably, this would keep some of the swarf from chipped gears
    from getting to the O/D. I have the flexible magnets in the O/D
    plug.<br>
    <br>
    Bob<br>
    <br>
    <i></i><br>
    <div class="moz-cite-prefix">On 8/4/2022 8:52 PM, Jean Caron wrote:<br>
    </div>
    <blockquote type="cite"
cite="mid:[email-masked]">
      <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
      <meta name="Generator" content="Microsoft Word 15 (filtered
        medium)">
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	panose-1:2 4 5 3 5 4 6 3 2 4;}@font-face
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      <div class="WordSection1">
        <p class="MsoNormal">Bob,</p>
        <p class="MsoNormal">AH Spares sells a magnetic washer for the
          overdrive. I have often seen, mostly on the late model
          overdrive three or four magnetic washers inside the brass
          drain plug, but they were of the flexible type, very much like
          thick fridge magnet that yu get from Real Estate Agent or the
          likes. You can purchase that stuff by the sheet at Staples in
          various thickness, so that is what I have done in the past and
          it seems to work.
        </p>
        <p class="MsoNormal"><o:p> </o:p></p>
        <p class="MsoNormal">Jean</p>
        <p class="MsoNormal"><o:p> </o:p></p>
        <p class="MsoNormal">Sent from <a
            href="https://go.microsoft.com/fwlink/?LinkId=550986"
            moz-do-not-send="true">
            Mail</a> for Windows</p>
        <p class="MsoNormal"><o:p> </o:p></p>
        <div
          style="mso-element:para-border-div;border:none;border-top:solid
          #E1E1E1 1.0pt;padding:3.0pt 0cm 0cm 0cm">
          <p class="MsoNormal" style="border:none;padding:0cm"><b>From:
            </b><a href="mailto:[email-masked]"
              moz-do-not-send="true">Bob Spidell</a><br>
            <b>Sent: </b>August 4, 2022 9:26 PM<br>
            <b>To: </b><a href="mailto:[email-masked]"
              moz-do-not-send="true">Michael Salter</a>; <a
              href="mailto:[email-masked]"
              moz-do-not-send="true">
              Simon Lachlan</a><br>
            <b>Cc: </b><a href="mailto:[email-masked]"
              moz-do-not-send="true" class="moz-txt-link-freetext">[email-masked]</a><br>
            <b>Subject: </b>Re: [Healeys] DW overdrive piston</p>
        </div>
        <p class="MsoNormal"><o:p> </o:p></p>
        <p class="MsoNormal" style="margin-bottom:12.0pt">Perhaps one of
          the exotic metal, 'high-strength' magnets just slapped on the
          outside of the plug? People sell magnet bands to go around
          spin-on oil filters.<br>
          <br>
          <br>
          <o:p></o:p></p>
        <div>
          <p class="MsoNormal">On 8/4/2022 1:57 PM, Michael Salter
            wrote:<o:p></o:p></p>
        </div>
        <blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
          <div>
            <p class="MsoNormal">I've never seen them for sale. I mill a
              3/8" depression in the business end of the original plug
              and squeeze a small disc magnet into it using J B Weld for
              extra security.
              <o:p></o:p></p>
            <div>
              <p class="MsoNormal"><o:p> </o:p></p>
            </div>
            <div>
              <p class="MsoNormal">M<o:p></o:p></p>
            </div>
          </div>
          <p class="MsoNormal"><o:p> </o:p></p>
          <div>
            <div>
              <p class="MsoNormal">On Thu., Aug. 4, 2022, 4:45 p.m. ,
                &lt;<a href="mailto:[email-masked]"
                  moz-do-not-send="true" class="moz-txt-link-freetext">[email-masked]</a>&gt;
                wrote:<o:p></o:p></p>
            </div>
            <blockquote style="border:none;border-left:solid #CCCCCC
              1.0pt;padding:0cm 0cm 0cm
              6.0pt;margin-left:4.8pt;margin-right:0cm">
              <div>
                <div>
                  <p class="MsoNormal"
                    style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
                      lang="EN-GB"> <o:p></o:p></span></p>
                  <p class="MsoNormal"
                    style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
                      lang="EN-GB"> <o:p></o:p></span></p>
                  <div>
                    <div style="border:none;border-top:solid #E1E1E1
                      1.0pt;padding:3.0pt 0cm 0cm 0cm">
                      <p class="MsoNormal"
                        style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><b><span
                            lang="EN-US">From:</span></b><span
                          lang="EN-US"> Healeys &lt;&gt;
                          <b>On Behalf Of </b>Bob Spidell<br>
                          <b>Sent:</b> 04 August 2022 18:13<br>
                          <b>To:</b> Michael Salter &lt;<a
                            href="mailto:[email-masked]"
                            target="_blank" moz-do-not-send="true"
                            class="moz-txt-link-freetext">[email-masked]</a>&gt;;
                          Warren Dietz &lt;<a
                            href="mailto:[email-masked]"
                            target="_blank" moz-do-not-send="true"
                            class="moz-txt-link-freetext">[email-masked]</a>&gt;<br>
                          <b>Cc:</b> <a
                            href="mailto:[email-masked]"
                            target="_blank" moz-do-not-send="true"
                            class="moz-txt-link-freetext">[email-masked]</a><br>
                          <b>Subject:</b> Re: [Healeys] DW overdrive
                          piston</span><span lang="EN-GB"><o:p></o:p></span></p>
                    </div>
                  </div>
                  <p class="MsoNormal"
                    style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
                      lang="EN-GB"> <o:p></o:p></span></p>
                  <p class="MsoNormal"
                    style="mso-margin-top-alt:auto;margin-bottom:12.0pt"><span
                      lang="EN-GB">OK, who sells magnetic plugs for
                      MOWOG gearboxes? I'd be willing to order from
                      Canada
                      <br>
                      <br>
                    </span><span lang="EN-US">&gt;&gt; See attached.  I
                      replaced the so-called “2<sup>nd</sup> type” with
                      the previous type which is the brass hex nut with
                      filter which bolts into a bolt in the bottom of
                      the pump. (I think that big flat plug in the 2<sup>nd</sup>
                      type is a wretched thing. Why did they do it? The
                      hex is much easier.)</span><span lang="EN-GB"><o:p></o:p></span></p>
                  <p class="MsoNormal"
                    style="mso-margin-top-alt:auto;margin-bottom:12.0pt"><span
                      lang="EN-US">Once you’ve got that sorted out you
                      can buy 2 or 3 of the magnetic rings that sit in
                      there. Per:-
                    </span><span lang="EN-GB"><a
href="https://nam12.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.ahead4healeys.co.uk%2FMAGNETIC-WASHER---DRAIN-PLUG-id3338.aspx&amp;data=05%7C01%7C%7C244dc597ca814aa6cd6a08da7689f235%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C637952632097954449%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&amp;sdata=LlAeo6Ms4xspLF3Yrc8hpjQu61fkNHmwaNTGRdqDnUQ%3D&amp;reserved=0"
                        target="_blank" moz-do-not-send="true">MAGNETIC
                        WASHER - DRAIN PLUG (ahead4healeys.co.uk)</a><o:p></o:p></span></p>
                  <p class="MsoNormal"
                    style="mso-margin-top-alt:auto;margin-bottom:12.0pt"><span
                      lang="EN-GB">As to overdrive pistons, I had a
                      fairly torrid time with those quite recently. I
                      should be inclined to ask Dave Twigger at
                      Overdrive Spares. I’m pretty sure that he sells
                      all types ie the AHSpares version, the original
                      type and – I think – the DW type. He supplies them
                      to all and sundry. Ask him which he thinks is best
                      for your application.
                      <o:p></o:p></span></p>
                  <p class="MsoNormal"
                    style="mso-margin-top-alt:auto;margin-bottom:12.0pt"><span
                      lang="EN-GB">I didn’t see the washer inside the
                      piston casing in any of the photos. Most people
                      insert them these days and I think they claim an
                      extra 20 or so PSI.<o:p></o:p></span></p>
                  <p class="MsoNormal"
                    style="mso-margin-top-alt:auto;margin-bottom:12.0pt"><span
                      lang="EN-GB">Simon<o:p></o:p></span></p>
                  <p class="MsoNormal"
                    style="mso-margin-top-alt:auto;margin-bottom:12.0pt"><span
                      lang="EN-US"> </span><span lang="EN-GB"><o:p></o:p></span></p>
                  <p class="MsoNormal"
                    style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
                      lang="EN-GB"> <o:p></o:p></span></p>
                </div>
              </div>
            </blockquote>
          </div>
        </blockquote>
        <p class="MsoNormal"><o:p> </o:p></p>
        <p class="MsoNormal"><o:p> </o:p></p>
      </div>
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    <br>
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[email-masked]

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---

From: Michael MacLean <[email-masked]>
Date: Sat, 6 Aug 2022 01:03:23 -0700

--===============2734599927130862563==

--000000000000f15ed705e58e04f6

When my BN2 transmission was rebuilt, the mechanic installed a Triumph
TR2/3 overdrive piston.  I don't know if it was new old stock or he ordered
it from Moss, but the BN2 and Triumph TR2/3 overdrive piston have the same
part number in the catalog.
Mike MacLean

On Fri, Aug 5, 2022 at 9:31 PM ahbn6--- via Healeys <[email-masked]>
wrote:

> To: Bob Spidell <[email-masked]>; Michael Salter <
> [email-masked]>; Warren Dietz <[email-masked]>
> http://autox.team.net/mailman/options/healeys/[email-masked]
>
>
> http://autox.team.net/mailman/options/healeys/[email-masked]
>
>

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<div dir=3D"ltr"><div>When my BN2 transmission was rebuilt, the mechanic in=
stalled a Triumph TR2/3 overdrive piston.=C2=A0 I don&#39;t know if it was =
new old stock or he ordered it from Moss, but the BN2 and Triumph TR2/3 ove=
rdrive piston have the same part number in the catalog. <br></div><div>Mike=
 MacLean<br></div></div><br><div class=3D"gmail_quote"><div dir=3D"ltr" cla=
ss=3D"gmail_attr">On Fri, Aug 5, 2022 at 9:31 PM ahbn6--- via Healeys &lt;<=
a href=3D"mailto:[email-masked]">[email-masked]</a>&gt; wro=
te:<br></div><blockquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px =
0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">Look at the =
Moss catalogue. They are listed there. I had them om my bn6 (which had a tr=
anny out of a BJ8))<br>
<br>
John Sims<br>
<a href=3D"http://www.healey6.com" rel=3D"noreferrer" target=3D"_blank">www=
.healey6.com</a><br>
Matawan, NJ<br>
<br>
-----Original Message-----<br>
From: Healeys &lt;<a href=3D"mailto:[email-masked]" target=
=3D"_blank">[email-masked]</a>&gt; On Behalf Of Bob Haskell=
<br>
Sent: Thursday, August 4, 2022 5:28 PM<br>
To: Bob Spidell &lt;<a href=3D"mailto:[email-masked]" target=3D"_blan=
k">[email-masked]</a>&gt;; Michael Salter &lt;<a href=3D"mailto:micha=
[email-masked]" target=3D"_blank">[email-masked]</a>&gt;; Warr=
en Dietz &lt;<a href=3D"mailto:[email-masked]" target=3D"_blank">fly=
[email-masked]</a>&gt;<br>
Cc: <a href=3D"mailto:[email-masked]" target=3D"_blank">healeys@aut=
ox.team.net</a><br>
Subject: Re: [Healeys] DW overdrive piston<br>
<br>
Might be something here that would work: <br>
<a href=3D"https://www.lislecorp.com/oem-products-division/magnetic-plugs/p=
ipe-thread/" rel=3D"noreferrer" target=3D"_blank">https://www.lislecorp.com=
/oem-products-division/magnetic-plugs/pipe-thread/</a><br>
<br>
Cheers,<br>
<br>
Bob Haskell<br>
Austin Healey 3000 BN7/BT7 registrar<br>
<br>
On 8/4/22 1:12 PM, Bob Spidell wrote:<br>
&gt; OK, who sells magnetic plugs for MOWOG gearboxes? I&#39;d be willing t=
o <br>
&gt; order from Canada ;)<br>
&gt;<br>
&gt; I don&#39;t remember exactly when I started using MT-90 in my gearbox,=
 but <br>
&gt; it was probably around 90-100K miles. I was hoping it would make the <=
br>
&gt; O/D a bit more responsive, but was surprised that shifting seemed <br>
&gt; smoother (I wasn&#39;t expecting it, so little-no confirmation bias).<=
br>
&gt;<br>
&gt;<br>
&gt; On 8/4/2022 9:38 AM, Michael Salter wrote:<br>
&gt;&gt; Based upon my observations when the aluminium overdrive accumulato=
r <br>
&gt;&gt; housings are scored you will invariably find that there are chips =
out <br>
&gt;&gt; of the non syncro 1st and reverse gears and usually badly damaged =
<br>
&gt;&gt; laygear rollers.<br>
&gt;&gt; Because these gearboxes were not fitted with chip gathering magnet=
 <br>
&gt;&gt; originally the tiny hardened steel chips eventually find their way=
 <br>
&gt;&gt; into the overdrive then through the overdrive pump gauze (because =
the <br>
&gt;&gt; magnets originally fitted in the overdrive have been lost by &quot=
; the <br>
&gt;&gt; lube guy&quot;) and lodge in the accumulator.<br>
&gt;&gt; Those chips very quickly score the cylinder as the accumulator pis=
ton <br>
&gt;&gt; moves.<br>
&gt;&gt; If you are careful to never grind 1st or reverse no chips will be =
<br>
&gt;&gt; created, that will mean that they don&#39;t go through the laygear=
 <br>
&gt;&gt; bearings or find their way into the overdrive.<br>
&gt;&gt; A magnetic plug in the gearbox is great insurance.<br>
&gt;&gt;<br>
&gt;&gt; M<br>
&gt;&gt;<br>
&gt;&gt; On Thu., Aug. 4, 2022, 12:13 p.m. Warren Dietz, <br>
&gt;&gt; &lt;<a href=3D"mailto:[email-masked]" target=3D"_blank">fly=
[email-masked]</a>&gt; wrote:<br>
&gt;&gt;<br>
&gt;&gt;=C2=A0 =C2=A0 =C2=A0Bob,<br>
&gt;&gt;<br>
&gt;&gt;=C2=A0 =C2=A0 =C2=A0Interesting observation.<br>
&gt;&gt;<br>
&gt;&gt;=C2=A0 =C2=A0 =C2=A0Only 30/40 wt non detergent oil was used from n=
ew till 2013=C2=A0 at<br>
&gt;&gt;=C2=A0 =C2=A0 =C2=A0which time I switched<br>
&gt;&gt;<br>
&gt;&gt;=C2=A0 =C2=A0 =C2=A0to Redline MT90 @ 181,000 miles.<br>
&gt;&gt;<br>
&gt;&gt;=C2=A0 =C2=A0 =C2=A0Sent from Mail &lt;<a href=3D"https://go.micros=
oft.com/fwlink/?LinkId=3D550986" rel=3D"noreferrer" target=3D"_blank">https=
://go.microsoft.com/fwlink/?LinkId=3D550986</a>&gt;<br>
&gt;&gt;=C2=A0 =C2=A0 =C2=A0for Windows<br>
&gt;&gt;<br>
&gt;&gt;=C2=A0 =C2=A0 =C2=A0*From: *Bob Spidell &lt;mailto:<a href=3D"mailt=
o:[email-masked]" target=3D"_blank">[email-masked]</a>&gt;<br>
&gt;&gt;=C2=A0 =C2=A0 =C2=A0*Sent: *Thursday, August 4, 2022 9:38 AM<br>
&gt;&gt;=C2=A0 =C2=A0 =C2=A0*To: *Warren Dietz &lt;mailto:<a href=3D"mailto=
:[email-masked]" target=3D"_blank">[email-masked]</a>&gt;;<br=
&gt;&gt;=C2=A0 =C2=A0 =C2=A0<a href=3D"mailto:[email-masked]" targe=
t=3D"_blank">[email-masked]</a><br>
&gt;&gt;=C2=A0 =C2=A0 =C2=A0*Subject: *Re: [Healeys] DW overdrive piston<br=
&gt;&gt;<br>
&gt;&gt;=C2=A0 =C2=A0 =C2=A0Warren,<br>
&gt;&gt;<br>
&gt;&gt;=C2=A0 =C2=A0 =C2=A0Your accumulator piston and housing look to hav=
e a bit worse<br>
&gt;&gt;=C2=A0 =C2=A0 =C2=A0scoring than mine; I used synthetic fluid for o=
ver half the life<br>
&gt;&gt;=C2=A0 =C2=A0 =C2=A0of mine, I wonder if that made a difference?<br=
&gt;&gt;<br>
&gt;&gt;<br>
&gt;&gt;<br>
&gt;&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0Sent from Mail<br>
&gt;&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0&lt;<a href=3D"https://go.microso=
ft.com/fwlink/?LinkId=3D550986" rel=3D"noreferrer" target=3D"_blank">https:=
//go.microsoft.com/fwlink/?LinkId=3D550986</a>&gt; for Windows<br>
&gt;&gt;<br>
&gt;&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0This was the condition of my pist=
on and housing with close to<br>
&gt;&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0200,000 miles. Tranny was well ma=
intained.<br>
&gt;&gt;<br>
&gt;&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0The original metal rings lasted 5=
3 years. So I guess with<br>
&gt;&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0unknown quality of either of toda=
ys metal vs rubber<br>
&gt;&gt;<br>
&gt;&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0O rings, let the experiments begi=
n.<br>
&gt;&gt;<br>
&gt;&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0*From: *Bob Spidell &lt;mailto:<a=
 href=3D"mailto:[email-masked]" target=3D"_blank">[email-masked]=
t</a>&gt;<br>
&gt;&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0*Sent: *Wednesday, August 3, 2022=
 10:12 PM<br>
&gt;&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0*To: *<a href=3D"mailto:healeys@a=
utox.team.net" target=3D"_blank">[email-masked]</a><br>
&gt;&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0*Subject: *Re: [Healeys] DW overd=
rive piston<br>
&gt;&gt;<br>
&gt;&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0The rings will score the inside o=
f the piston housing, though<br>
&gt;&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0not badly (photo at 205K miles). =
Looks like there&#39;s a side<br>
&gt;&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0load on the piston, probably from=
 the spring.<br>
&gt;&gt;<br>
&gt;&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0I donated this accumulator to ano=
ther owner; never heard how<br>
&gt;&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0they worked. Moss shows the rings=
 available (but who knows?).<br>
&gt;&gt;<br>
&gt;&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0On 8/3/2022 12:36 PM, Henry G Lea=
ch via Healeys wrote:<br>
&gt;&gt;<br>
&gt;&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0I assemble ODs usin=
g the original metal rings and have<br>
&gt;&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0not had any issues =
with pressure or<br>
&gt;&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0engagement/disengag=
ement.<br>
&gt;&gt;<br>
&gt;&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0When Mr. DeNormanvi=
lle stayed up in the middle of the<br>
&gt;&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0night to engineer t=
he operation of the unit,=C2=A0 I think he<br>
&gt;&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0decided that the us=
e of softer rings (sacrificial metal)<br>
&gt;&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0against a hardened =
casing was the best solution for<br>
&gt;&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0control and wear.=
=C2=A0 If a rubber o-ring was a better<br>
&gt;&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0solution, he would =
have used one with the proper buna rating.<br>
&gt;&gt;<br>
&gt;&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0I think the bigger =
problem, now-a-days, is the<br>
&gt;&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0availability of the=
 metal piston rings.=C2=A0 Rubber O rings<br>
&gt;&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0are a dime-a-dozen.=
=C2=A0 If you contact Overdrive Spares in<br>
&gt;&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0the UK, they should=
 be able to supply the proper rings. <br>
&gt;&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0If they too, have d=
ecided to go with rubber, then plan on<br>
&gt;&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0a breakdown/rebuild=
 in a shorter period of time than<br>
&gt;&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0units equipped with=
 the original parts that last a long,<br>
&gt;&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0long time. Hank<br>
&gt;&gt;<br>
&gt;&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0-------------------=
----------------------<br>
&gt;&gt;<br>
&gt;&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0From: &quot;Michael=
 Salter&quot;<br>
&gt;&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0To: &quot;<a href=
=3D"mailto:[email-masked]" target=3D"_blank">[email-masked]=
</a>&quot; &lt;mailto:<a href=3D"mailto:[email-masked]" target=3D"_=
blank">[email-masked]</a>&gt;<br>
&gt;&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0Cc:<br>
&gt;&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0Sent: Wednesday Aug=
ust 3 2022 9:38:15AM<br>
&gt;&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0Subject: Re: [Heale=
ys] DW overdrive piston<br>
&gt;&gt;<br>
&gt;&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0I have a question a=
bout the &quot;O&quot; ring type of accumulator.<br>
&gt;&gt;<br>
&gt;&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0The way the accumul=
ator works is that when it is fully<br>
&gt;&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0charged the piston =
moves against the spring until the<br>
&gt;&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0rings reach the rad=
ial holes in the wall of the housing<br>
&gt;&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0which acts to relie=
ve any excess pressure.<br>
&gt;&gt;<br>
&gt;&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0My concern is that =
at 3 - 400 p.s.i. oil will obviously<br>
&gt;&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0get behind the &quo=
t;O&quot; ring and force the material of the &quot;O&quot;<br>
&gt;&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0ring into those rad=
ial holes and then, as the piston<br>
&gt;&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0moves back over the=
m, a piece of the ring will shear off.<br>
&gt;&gt;<br>
&gt;&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0I&#39;m guessing th=
at Laycock-DeNormanville used the complex<br>
&gt;&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0cast iron rings rat=
her than &quot;O&quot; rings because they<br>
&gt;&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0recognized the poss=
ibility of this happening.<br>
&gt;&gt;<br>
&gt;&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0I&#39;m sure that t=
iny pieces of the &quot;O&quot; ring would be found<br>
&gt;&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0in the filter if th=
is was a problem. Anyone found them or<br>
&gt;&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0noticed damage to t=
heir accumulator &quot;O&quot; ring upon<br>
&gt;&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0disassembly?<br>
&gt;&gt;<br>
&gt;&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0M<br>
&gt;&gt;<br>
&gt;&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0On Wed, Aug 3, 2022=
 at 9:08 AM Bob Spidell<br>
&gt;&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0&lt;<a href=3D"mail=
to:[email-masked]" target=3D"_blank">[email-masked]</a>&gt; &lt=
;mailto:<a href=3D"mailto:[email-masked]" target=3D"_blank">bspidell@=
comcast.net</a>&gt; wrote:<br>
&gt;&gt;<br>
&gt;&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0I put=
 one in my BJ8&#39;s O/D. It&#39;s subjective*--O/Ds<br>
&gt;&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0seem =
to work a little<br>
&gt;&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0quick=
er with cold, thick oil than hot oil--but it<br>
&gt;&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0cuts =
maybe a third off<br>
&gt;&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0engag=
ement time on average. I had the O/D on the<br>
&gt;&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0bench=
 and disassembled,<br>
&gt;&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0and t=
he current one had a scored barrel so, why not?<br>
&gt;&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0Engag=
ement isn&#39;t<br>
&gt;&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0much,=
 if any, harsher than before which, I believe is<br>
&gt;&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0the r=
eason DMH<br>
&gt;&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0wante=
d the weaker, smaller spring. If I&#39;d known about<br>
&gt;&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0it, I=
 might have<br>
&gt;&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0bough=
t AHSpares&#39; with an O-ring instead.<br>
&gt;&gt;<br>
&gt;&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0* I&#=
39;ve never really &#39;timed&#39; O/D functioning, it would<br>
&gt;&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0be a =
bit awkward;<br>
&gt;&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0anyon=
e done it? I usually tap the clutch pedal when<br>
&gt;&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0engag=
ing O/D, and<br>
&gt;&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0give =
a little throttle when disengaging. I thought<br>
&gt;&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0mine =
engaged a little<br>
&gt;&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0quick=
er when I switched to synthetic fluid from<br>
&gt;&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0engin=
e oil, but in all<br>
&gt;&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0cases=
 confirmation bias may be involved.<br>
&gt;&gt;<br>
&gt;&gt;<br>
&gt;&gt;<br>
&gt;&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0On 8/=
2/2022 8:09 PM, Joseph Costa wrote:<br>
&gt;&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0&gt; =
Has anyone installed their upgraded overdrive<br>
&gt;&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0pisto=
n?=C2=A0 If so, is it<br>
&gt;&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0&gt; =
worth the trouble ?<br>
&gt;&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0&gt;<=
br>
&gt;&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0&gt; =
Joe<br>
&gt;&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0&gt; =
BN1 #923<br>
&gt;&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0&gt;<=
br>
&gt;&gt;<br>
&gt;&gt;<br>
&gt;<br>
&gt;<br>
&gt; _______________________________________________<br>
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