valve cover gasket --- gasket sealant?

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Tom J Medeiros - 24 Jul 2006 03:04 GMT

Greetings,

I've replaced the valve cover gaskets on my 1970 911t and have now developed
a link on the passenger side exhaust cover, between the cover and the
gasket. I've never used gasket sealant on my Porsche and now wonder if I
should.

This last set of gaskets I purchased are the newer silicone ones with the
bead. I wonder if I should use the old style graphite.

Has anyone else encountered this issue, and if so, what have you done?
Sealant or no sealant? Graphite or Silicone gaskets?

Thanks,

Signature

Tom Medeiros
Vantaggio Design, LLC
Complete Computing Solutions
info@vantaggiodesign.com

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Ed Beroset - 27 Jul 2006 08:48 GMT

> Greetings,
>
> I've replaced the valve cover gaskets on my 1970 911t and have now developed
> a link on the passenger side exhaust cover, between the cover and the
> gasket. I've never used gasket sealant on my Porsche and now wonder if I
> should.

I don't think it should be necessary.

> This last set of gaskets I purchased are the newer silicone ones with the
> bead. I wonder if I should use the old style graphite.

Actually, I think they may be asbestos (or other hi-temp substitute)
coated with a graphite material. That's what I've always used and have
only had leaks a few times -- always due to my own error. For example,
the nylon locking nuts should NOT be reused (most gasket kits come with
a set anyway), the gaskets themselves should not be reused, and once I
even put a gasket in backwards! (Fortunately, I didn't drive it too far.)

If you have persistent leaks with new gaskets, you might also have
warped valve covers. Some people machine them, but I'd probably just
replace them if that happened to mine. Fortunately, I have the updated
turbo exhaust valve covers which have extra ribbing and less of a
tendency to warp. That might be an option for you -- but I don't know
for sure if they'll fit on a 1970 engine.

Ed

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jtsails - 29 Jul 2006 15:33 GMT

>> Greetings,
>>
[quoted text clipped - 23 lines]
>
> Ed

The turbo covers are definitely a nice upgrade and they will fit on a
2.2 liter with no problems, I have them on mine.

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