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Alan
I am not sure that I understand 'original'?
Most A90 Atlantic had single valve springs as does the early 100.
Double valve springs could be fitted to an A90 and some owners have done
so. The double types had different locator rings next to the head and at
the top more fitting to locate the double springs. The top oil seal was
located differently. There was very little in common between the single and
double spring setups. I would suggest fitting the double version because it
was supposed to eliminate valve bounce.
What I guess that what you are seeing is a non-stangard extra seal;
possibly to reduce oil being burnt that gets down worn guides. I have seen
firms selling these to reduce oil consumption.
On Sun, 21 Feb 2021 at 05:31, Alan Seigrist via Healeys <
healeys@autox.team.net> 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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<div dir=3D"ltr">Alan<div><br></div><div>I am not sure that I understand &#=
39;original'?</div><div><br></div><div>Most A90 Atlantic had single val=
ve springs as does the early=C2=A0100. Double=C2=A0valve springs could be f=
itted to an A90 and some owners have done so. The double types had differen=
t=C2=A0locator rings next to the head and at the top more fitting to locate=
the double springs. The top oil seal was located differently. There was ve=
ry little in common between the single and double spring setups. I would su=
ggest fitting the double version=C2=A0because it was supposed to eliminate =
valve bounce.</div><div><br></div><div>What I guess that what you are seein=
g is a non-stangard=C2=A0extra seal; possibly to reduce oil being burnt tha=
t gets down worn guides. I have seen firms selling these to reduce oil cons=
umption.</div></div><br><div class=3D"gmail_quote"><div dir=3D"ltr" class=
=3D"gmail_attr">On Sun, 21 Feb 2021 at 05:31, Alan Seigrist via Healeys <=
;<a href=3D"mailto:healeys@autox.team.net";>healeys@autox.team.net</a>> w=
rote:<br></div><blockquote class=3D"gmail_quote" style=3D"margin:0px 0px 0p=
x 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir=
=3D"ltr">All -<div><br></div><div>On my A90 I am lapping one of the exhaust=
valves and this seal came off the upper part of the valve guide.</div><div=
><br></div><div>It seems this is an original style valve seal shroud which =
no one sells.=C2=A0 I assume the best thing is to remove it and chuck it, c=
orrect?=C2=A0 It's already half disintegrated and I'm not really wo=
rried but would prefer to not=C2=A0 put it back on and have old rubber part=
s getting into the oil.</div><div><br></div><div>Am I correct to=C2=A0not p=
ut it back on?=C2=A0 No one seems to sell these.</div><div><br></div><div>B=
est,</div><div><br></div><div>Alan</div><div><br></div><div><br></div></div=
>
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