73-87 Chevy _ GMC Trucks > Engine/Drivetrain

Head Gaskets

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bigben5054:
1979 K20 with 350 engine.  Newly rebuilt.  Had a little valve issue initially, but we are on the mend now.  I measured the piston depth in the cylinder and I am at .026.  I bought the Fel Pro 1094 steel shim head gaskets that are .015 thick, which puts me at .041.  The instructions that came with the gaskets talk about needing a very smooth surface in order for the gaskets to not fail.  It goes on to say that if they are not smooth, coat both sides of the gaskets with a sealer.  My block is basically fresh from the machine shop and heads are super clean, so I think I'm good.  But, I have a can of copper spray gasket sealer, so any harm in spraying them just for extra insurance?  Will the copper spray increase the thickness of the gaskets to any concern?

VileZambonie:
Yes, use the copper spray on the steel shim gaskets.

JohnnyPopper:
No thickness issues.

Go forward with copper spray.

I have used it for years with great success.

bigben5054:
Thanks guys.

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