Head Gasket

[fmster]

I have a coper shim gasket for the heads,are they any good. Do they seal good?

[kenmosher]

Not really good at holding boost or the extreme temperatures of the turbo motors.

Best headgaskets will have a stainless steel fire ring around the cylinder. The stockers, Cometics, and some of the Victor gaskets work the best.

Steel gaskets work well on the earlier hot air cars ...

[fmster]

Thanks ! GM discontinued the stock gasket,Where can I get them and how$?

[PaCemkr86]

www.rjcracing.com
http://www.rjcracing.com/RJC_Buick_P...asket_kit.html

[Keller]

Aren't the stock 86/87 gaskets available under a Victor or other aftermarket P/N? I forget...

FWIW, the Cometics may be a lot better (though more expensive) for these motors.

[pfredricks]

Originally Posted by Keller

Aren't the stock 86/87 gaskets available under a Victor or other aftermarket P/N?

I recorded Victor head gasket P/N 5819 when I was researching gasket sets.

5819 for stock bore
5820 for overbore
5820SG for high zoot NitroSeal

Not sure how much overbore the 5820 supports, but I'd wager it don't make a difference unless you are going over 30 thou, and I'd be worried about wall thickness and parts availability in that case.