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Michael--
The new rubber timing chain tensioner came with installation instructions
which in part said "Replace every 50-75 years".
Best--Michael Oritt
On Sun, Feb 21, 2021 at 3:38 PM Michael Salter via Healeys <
healeys@autox.team.net> 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
>>> >
>>> >
>>>
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>>>
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>>>
>>> _______________________________________________
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>> _______________________________________________
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Content-Transfer-Encoding: quoted-printable
<div dir=3D"ltr"><div class=3D"gmail_default" style=3D"color:#3333ff">Micha=
el--</div><div class=3D"gmail_default" style=3D"color:#3333ff"><br></div><d=
iv class=3D"gmail_default" style=3D"color:#3333ff">The=C2=A0new rubber timi=
ng chain tensioner came with installation instructions which in part said &=
quot;Replace every 50-75 years".</div><div class=3D"gmail_default" sty=
le=3D"color:#3333ff"><br></div><div class=3D"gmail_default" style=3D"color:=
#3333ff">Best--Michael Oritt</div></div><br><div class=3D"gmail_quote"><div=
dir=3D"ltr" class=3D"gmail_attr">On Sun, Feb 21, 2021 at 3:38 PM Michael S=
alter via Healeys <<a href=3D"mailto:healeys@autox.team.net";>healeys@aut=
ox.team.net</a>> 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"font-fami=
ly:"comic sans ms",sans-serif;font-size:small">Until fairly recen=
t years I had never experienced the breaking up of the rubber slipper on ti=
ming chain tensioners but the engine I recently disassembled had one that w=
as completely destroyed. Apparently this was the original tensioner so I=
9;m wondering if these things have a definite life which originals are now =
reaching.</div><div class=3D"gmail_default" style=3D"font-family:"comi=
c sans ms",sans-serif;font-size:small"><br></div><div class=3D"gmail_d=
efault" style=3D"font-family:"comic sans ms",sans-serif;font-size=
:small">M<br></div></div><br><div class=3D"gmail_quote"><div dir=3D"ltr" cl=
ass=3D"gmail_attr">On Sun, Feb 21, 2021 at 2:27 PM Michael Oritt via Healey=
s <<a href=3D"mailto:healeys@autox.team.net"; target=3D"_blank">healeys@a=
utox.team.net</a>> wrote:<br></div><blockquote class=3D"gmail_quote" sty=
le=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);paddi=
ng-left:1ex"><div dir=3D"ltr"><div class=3D"gmail_default" style=3D"color:r=
gb(51,51,255)">In the string about rubber valve seal shrouds Bob Spidell sa=
id:=C2=A0 "By no means let crumbling rubber parts see the inside of an=
engine."</div><div class=3D"gmail_default" style=3D"color:rgb(51,51,2=
55)"><br></div><div class=3D"gmail_default" style=3D"color:rgb(51,51,255)">=
About a year back I dropped the oil pan on my 100 to replace the oil pump a=
nd found numerous chunks of what seemed like very hard black plastic distri=
buted throughout the sump.=C2=A0 This was a head scratcher as I knew there =
could be no plastic in the engine's interior yet there it was.=C2=A0 Af=
ter thinking=C2=A0about it further I decided that it could only have been t=
he remains of the rubber timing chain tensioner and sure enough when I pull=
ed the front cover I saw that the tensioner was non-existent=C2=A0and the c=
hain pretty loose.=C2=A0 I replaced the chain and tensioner--not an easy jo=
b--and magically a chattering sound that had been=C2=A0appearing at certain=
rpm's=C2=A0disappeared, no doubt a harmonic rattling of the loose timi=
ng 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)">Best-=
-Michael Oritt</div></div><br><div class=3D"gmail_quote"><div dir=3D"ltr" c=
lass=3D"gmail_attr">On Sun, Feb 21, 2021 at 12:17 PM Bob Spidell <<a hre=
f=3D"mailto:bspidell@comcast.net"; target=3D"_blank">bspidell@comcast.net</a=
>> 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">Mos=
t mechanics favor modern 'top hat' style seals--I think they'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>
> All -<br>
><br>
> On my A90 I am lapping one of the exhaust valves and this seal came <b=
r>
> off the upper part of the valve guide.<br>
><br>
> It seems this is an original style valve seal shroud which no one <br>
> sells.=C2=A0 I assume the best thing is to remove it and chuck it, <br=
>
> correct?=C2=A0 It's already half disintegrated and I'm not rea=
lly worried <br>
> but would prefer to not=C2=A0 put it back on and have old rubber parts=
<br>
> getting into the oil.<br>
><br>
> Am I correct to=C2=A0not put it back on?=C2=A0 No one seems to sell th=
ese.<br>
><br>
> Best,<br>
><br>
> Alan<br>
><br>
><br>
<br>
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