Re: [Healeys] 100/4 / A90 old style valve seals

[Michael Oritt via Healeys <healeys@autox.team.net>]

--===============0652085630658689957==

--00000000000051446d05bbee112d

Bob wrote:  "I'm surprised they lasted this long--if they did--it's a
pretty harsh environment for rubber. As a rule, I don't lubricate any
rubber parts with a petroleum-based grease or oil; silicone is supposedly
less antagonistic to rubber."
--------------------------------------------
50 to 75 years is a pretty good replacement cycle.
Maybe we should now be searching for silicon-based motor oils?

Best--Michael Oritt

On Sun, Feb 21, 2021 at 3:47 PM Bob Spidell <bspidell@comcast.net> wrote:

> re: "... I'm wondering if these things have a definite life which
> originals are now reaching."
>
> I'm surprised they lasted this long--if they did--it's a pretty harsh
> environment for rubber. As a rule, I don't lubricate any rubber parts with
> a petroleum-based grease or oil; silicone is supposedly less antagonistic
> to rubber.
>
> Side note: The original car gear for the 4-cyls, with the metal 'slinger'
> plate are NLA. A Moss blurb advises transferring an original plate to one
> of their newer replacements; anyone tried this (it requires rivets)?
>
>
> On 2/21/2021 12:37 PM, Michael Salter via Healeys wrote:
>
> Until fairly recent years I had never experienced the breaking up of the
> rubber slipper on timing chain tensioners but the engine I recently
> disassembled had one that was completely destroyed. Apparently this was the
> original tensioner so I'm wondering if these things have a definite life
> which originals are now reaching.
>
> M
>
> On Sun, Feb 21, 2021 at 2:27 PM Michael Oritt via Healeys <
> healeys@autox.team.net> wrote:
>
>> In the string about rubber valve seal shrouds Bob Spidell said:  "By no
>> means let crumbling rubber parts see the inside of an engine."
>>
>> About a year back I dropped the oil pan on my 100 to replace the oil pump
>> and found numerous chunks of what seemed like very hard black plastic
>> distributed throughout the sump.  This was a head scratcher as I knew there
>> could be no plastic in the engine's interior yet there it was.  After
>> thinking about it further I decided that it could only have been the
>> remains of the rubber timing chain tensioner and sure enough when I pulled
>> the front cover I saw that the tensioner was non-existent and the chain
>> pretty loose.  I replaced the chain and tensioner--not an easy job--and
>> magically a chattering sound that had been appearing at certain
>> rpm's disappeared, no doubt a harmonic rattling of the loose timing chain.
>>
>> Best--Michael Oritt
>>
>> On Sun, Feb 21, 2021 at 12:17 PM Bob Spidell <bspidell@comcast.net>
>> wrote:
>>
>>> Most mechanics favor modern 'top hat' style seals--I think they're one
>>> piece--unless, of course, Concours Gold requires blue smoke from the
>>> tailpipe.
>>>
>>> By no means let crumbling rubber parts see the inside of an engine.
>>>
>>> Bob
>>>
>>>
>>> On 2/20/2021 9:28 PM, Alan Seigrist via Healeys wrote:
>>> > All -
>>> >
>>> > On my A90 I am lapping one of the exhaust valves and this seal came
>>> > off the upper part of the valve guide.
>>> >
>>> > It seems this is an original style valve seal shroud which no one
>>> > sells.  I assume the best thing is to remove it and chuck it,
>>> > correct?  It's already half disintegrated and I'm not really worried
>>> > but would prefer to not  put it back on and have old rubber parts
>>> > getting into the oil.
>>> >
>>> > Am I correct to not put it back on?  No one seems to sell these.
>>> >
>>> > Best,
>>> >
>>> > Alan
>>> >
>>> >
>>>
>>> _______________________________________________
>>> Support Team.Net http://www.team.net/donate.html
>>> Suggested annual donation  $12.75
>>>
>>> Archive: http://www.team.net/pipermail/healeys
>>> http://autox.team.net/archive
>>>
>>> Healeys@autox.team.net
>>> http://autox.team.net/mailman/listinfo/healeys
>>>
>>> Unsubscribe/Manage:
>>> http://autox.team.net/mailman/options/healeys/michael.oritt@gmail.com
>>>
>>> _______________________________________________
>> Support Team.Net http://www.team.net/donate.html
>> Suggested annual donation  $12.75
>>
>> Archive: http://www.team.net/pipermail/healeys
>> http://autox.team.net/archive
>>
>> Healeys@autox.team.net
>> http://autox.team.net/mailman/listinfo/healeys
>>
>> Unsubscribe/Manage:
>> http://autox.team.net/mailman/options/healeys/michaelsalter@gmail.com
>>
>>
> _______________________________________________
> Support Team.Net http://www.team.net/donate.html
> Suggested annual donation  $12.75
>
> Archive: http://www.team.net/pipermail/healeys http://autox.team.net/archive
> Healeys@autox.team.nethttp://autox.team.net/mailman/listinfo/healeys
>
> Unsubscribe/Manage: 
> http://autox.team.net/mailman/options/healeys/bspidell@comcast.net
>
>
> _______________________________________________
> Support Team.Net http://www.team.net/donate.html
> Suggested annual donation  $12.75
>
> Archive: http://www.team.net/pipermail/healeys
> http://autox.team.net/archive
>
> Healeys@autox.team.net
> http://autox.team.net/mailman/listinfo/healeys
>
> Unsubscribe/Manage:
> http://autox.team.net/mailman/options/healeys/michael.oritt@gmail.com
>
>

--00000000000051446d05bbee112d
Content-Transfer-Encoding: quoted-printable

<div dir=3D"ltr"><div class=3D"gmail_default" style=3D""><span style=3D"col=
or:rgb(51,51,255)">Bob wrote:=C2=A0 </span><font color=3D"#0000ff">&quot;I&=
#39;m surprised they lasted this long--if they did--it&#39;s a pretty harsh=
 environment for rubber. As a rule, I don&#39;t lubricate any rubber parts =
with a petroleum-based grease or oil; silicone is supposedly less antagonis=
tic to rubber.&quot;</font></div><div class=3D"gmail_default" style=3D""><f=
ont color=3D"#0000ff">--------------------------------------------</font></=
div><div class=3D"gmail_default" style=3D""><font color=3D"#0000ff">50 to 7=
5 years is a pretty good replacement cycle.=C2=A0=C2=A0</font></div><div cl=
ass=3D"gmail_default" style=3D""><font color=3D"#0000ff">Maybe we should no=
w be searching for silicon-based motor oils?</font></div><div class=3D"gmai=
l_default" style=3D""><font color=3D"#0000ff"><br></font></div><div class=
=3D"gmail_default" style=3D""><font color=3D"#0000ff">Best--Michael Oritt</=
font></div></div><br><div class=3D"gmail_quote"><div dir=3D"ltr" class=3D"g=
mail_attr">On Sun, Feb 21, 2021 at 3:47 PM Bob Spidell &lt;<a href=3D"mailt=
o:bspidell@comcast.net">bspidell@comcast.net</a>&gt; wrote:<br></div><block=
quote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left:1=
px solid rgb(204,204,204);padding-left:1ex">
 =20
   =20
 =20
  <div>
    re: &quot;... I&#39;m wondering if these things have a definite life wh=
ich
    originals are now reaching.&quot;<br>
    <br>
    I&#39;m surprised they lasted this long--if they did--it&#39;s a pretty
    harsh environment for rubber. As a rule, I don&#39;t lubricate any
    rubber parts with a petroleum-based grease or oil; silicone is
    supposedly less antagonistic to rubber.<br>
    <br>
    Side note: The original car gear for the 4-cyls, with the metal
    &#39;slinger&#39; plate are NLA. A Moss blurb advises transferring an
    original plate to one of their newer replacements; anyone tried this
    (it requires rivets)?<br>
    <br>
    <br>
    <div>On 2/21/2021 12:37 PM, Michael Salter
      via Healeys wrote:<br>
    </div>
    <blockquote type=3D"cite">
     =20
      <div dir=3D"ltr">
        <div class=3D"gmail_default" style=3D"font-family:&quot;comic sans =
ms&quot;,sans-serif;font-size:small">Until fairly recent years I had
          never experienced the breaking up of the rubber slipper on
          timing chain tensioners but the engine I recently disassembled
          had one that was completely destroyed. Apparently this was the
          original tensioner so I&#39;m wondering if these things have a
          definite life which originals are now reaching.</div>
        <div class=3D"gmail_default" style=3D"font-family:&quot;comic sans =
ms&quot;,sans-serif;font-size:small"><br>
        </div>
        <div class=3D"gmail_default" style=3D"font-family:&quot;comic sans =
ms&quot;,sans-serif;font-size:small">M<br>
        </div>
      </div>
      <br>
      <div class=3D"gmail_quote">
        <div dir=3D"ltr" class=3D"gmail_attr">On Sun, Feb 21, 2021 at 2:27
          PM Michael Oritt via Healeys &lt;<a href=3D"mailto:healeys@autox.=
team.net" target=3D"_blank">healeys@autox.team.net</a>&gt;
          wrote:<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">
          <div dir=3D"ltr">
            <div class=3D"gmail_default" style=3D"color:rgb(51,51,255)">In
              the string about rubber valve seal shrouds Bob Spidell
              said:=C2=A0 &quot;By no means let crumbling rubber parts see =
the
              inside of an engine.&quot;</div>
            <div class=3D"gmail_default" style=3D"color:rgb(51,51,255)"><br=
>
            </div>
            <div class=3D"gmail_default" style=3D"color:rgb(51,51,255)">Abo=
ut
              a year back I dropped the oil pan on my 100 to replace the
              oil pump and found numerous chunks of what seemed like
              very hard black plastic distributed throughout the sump.=C2=
=A0
              This was a head scratcher as I knew there could be no
              plastic in the engine&#39;s interior yet there it was.=C2=A0 =
After
              thinking=C2=A0about it further I decided that it could only
              have been the remains of the rubber timing chain tensioner
              and sure enough when I pulled the front cover I saw that
              the tensioner was non-existent=C2=A0and the chain pretty
              loose.=C2=A0 I replaced the chain and tensioner--not an easy
              job--and magically a chattering sound that had
              been=C2=A0appearing at certain rpm&#39;s=C2=A0disappeared, no=
 doubt a
              harmonic rattling of the loose timing chain.</div>
            <div class=3D"gmail_default" style=3D"color:rgb(51,51,255)"><br=
>
            </div>
            <div class=3D"gmail_default" style=3D"color:rgb(51,51,255)">Bes=
t--Michael
              Oritt</div>
          </div>
          <br>
          <div class=3D"gmail_quote">
            <div dir=3D"ltr" class=3D"gmail_attr">On Sun, Feb 21, 2021 at
              12:17 PM Bob Spidell &lt;<a href=3D"mailto:bspidell@comcast.n=
et" target=3D"_blank">bspidell@comcast.net</a>&gt;
              wrote:<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">Most mechanic=
s favor
              modern &#39;top hat&#39; style seals--I think they&#39;re one=
 <br>
              piece--unless, of course, Concours Gold requires blue
              smoke from the <br>
              tailpipe.<br>
              <br>
              By no means let crumbling rubber parts see the inside of
              an engine.<br>
              <br>
              Bob<br>
              <br>
              <br>
              On 2/20/2021 9:28 PM, Alan Seigrist via Healeys wrote:<br>
              &gt; All -<br>
              &gt;<br>
              &gt; On my A90 I am lapping one of the exhaust valves and
              this seal came <br>
              &gt; off the upper part of the valve guide.<br>
              &gt;<br>
              &gt; It seems this is an original style valve seal shroud
              which no one <br>
              &gt; sells.=C2=A0 I assume the best thing is to remove it and
              chuck it, <br>
              &gt; correct?=C2=A0 It&#39;s already half disintegrated and I=
&#39;m not
              really worried <br>
              &gt; but would prefer to not=C2=A0 put it back on and have ol=
d
              rubber parts <br>
              &gt; getting into the oil.<br>
              &gt;<br>
              &gt; Am I correct to=C2=A0not put it back on?=C2=A0 No one se=
ems to
              sell these.<br>
              &gt;<br>
              &gt; Best,<br>
              &gt;<br>
              &gt; Alan<br>
              &gt;<br>
              &gt;<br>
              <br>
              _______________________________________________<br>
              Support Team.Net <a href=3D"http://www.team.net/donate.html"; =
rel=3D"noreferrer" target=3D"_blank">http://www.team.net/donate.html</a><br=
>
              Suggested annual donation=C2=A0 $12.75<br>
              <br>
              Archive: <a href=3D"http://www.team.net/pipermail/healeys"; re=
l=3D"noreferrer" target=3D"_blank">http://www.team.net/pipermail/healeys</a=
>
              <a href=3D"http://autox.team.net/archive"; rel=3D"noreferrer" =
target=3D"_blank">http://autox.team.net/archive</a><br>
              <br>
              <a href=3D"mailto:Healeys@autox.team.net"; target=3D"_blank">H=
ealeys@autox.team.net</a><br>
              <a href=3D"http://autox.team.net/mailman/listinfo/healeys"; re=
l=3D"noreferrer" target=3D"_blank">http://autox.team.net/mailman/listinfo/h=
ealeys</a><br>
              <br>
              Unsubscribe/Manage: <a href=3D"http://autox.team.net/mailman/=
options/healeys/michael.oritt@gmail.com" rel=3D"noreferrer" target=3D"_blan=
k">http://autox.team.net/mailman/options/healeys/michael.oritt@gmail.com</a=
><br>
              <br>
            </blockquote>
          </div>
          _______________________________________________<br>
          Support Team.Net <a href=3D"http://www.team.net/donate.html"; rel=
=3D"noreferrer" target=3D"_blank">http://www.team.net/donate.html</a><br>
          Suggested annual donation=C2=A0 $12.75<br>
          <br>
          Archive: <a href=3D"http://www.team.net/pipermail/healeys"; rel=3D=
"noreferrer" target=3D"_blank">http://www.team.net/pipermail/healeys</a>
          <a href=3D"http://autox.team.net/archive"; rel=3D"noreferrer" targ=
et=3D"_blank">http://autox.team.net/archive</a><br>
          <br>
          <a href=3D"mailto:Healeys@autox.team.net"; target=3D"_blank">Heale=
ys@autox.team.net</a><br>
          <a href=3D"http://autox.team.net/mailman/listinfo/healeys"; rel=3D=
"noreferrer" target=3D"_blank">http://autox.team.net/mailman/listinfo/heale=
ys</a><br>
          <br>
          Unsubscribe/Manage: <a href=3D"http://autox.team.net/mailman/opti=
ons/healeys/michaelsalter@gmail.com" rel=3D"noreferrer" target=3D"_blank">h=
ttp://autox.team.net/mailman/options/healeys/michaelsalter@gmail.com</a><br=
>
          <br>
        </blockquote>
      </div>
      <br>
      <fieldset></fieldset>
      <pre>_______________________________________________
nk">http://www.team.net/donate.html</a>

Archive: <a href=3D"http://www.team.net/pipermail/healeys"; target=3D"_blank=
">http://www.team.net/pipermail/healeys</a> <a href=3D"http://autox.team.ne=
t/archive" target=3D"_blank">http://autox.team.net/archive</a>

<a href=3D"mailto:Healeys@autox.team.net"; target=3D"_blank">Healeys@autox.t=
eam.net</a>
<a href=3D"http://autox.team.net/mailman/listinfo/healeys"; target=3D"_blank=
">http://autox.team.net/mailman/listinfo/healeys</a>

s/bspidell@comcast.net" target=3D"_blank">http://autox.team.net/mailman/opt=
ions/healeys/bspidell@comcast.net</a>

</pre>
    </blockquote>
    <br>
  </div>

_______________________________________________<br>
rer" 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" target=3D"_blank">http://www.team.net/pipermail/healeys</a> <a href=3D"h=
ttp://autox.team.net/archive" rel=3D"noreferrer" target=3D"_blank">http://a=
utox.team.net/archive</a><br>
<br>
<a href=3D"mailto:Healeys@autox.team.net"; target=3D"_blank">Healeys@autox.t=
eam.net</a><br>
<a href=3D"http://autox.team.net/mailman/listinfo/healeys"; rel=3D"noreferre=
r" target=3D"_blank">http://autox.team.net/mailman/listinfo/healeys</a><br>
<br>
s/michael.oritt@gmail.com" rel=3D"noreferrer" target=3D"_blank">http://auto=
x.team.net/mailman/options/healeys/michael.oritt@gmail.com</a><br>
<br>
</blockquote></div>

--00000000000051446d05bbee112d--

--===============0652085630658689957==
Content-Transfer-Encoding: 7bit
Content-Disposition: inline

_______________________________________________

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

Healeys@autox.team.net
http://autox.team.net/mailman/listinfo/healeys



--===============0652085630658689957==--