Quote:
Originally Posted by BRENT in 10-uh-C
As mentioned, the RA finish of the head must be quality. In other words, if you cannot see your reflection from the head and block's gasket surface, then the surface finish grade is too low. My Kwik Way surfacing machine will consistently produce a 70+ RA finish. If the surface finish is above a 65 and the surface is flat within 0.0005 of each other, then there won't be any seepage.
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Wait a second, doesn't the Ra number go
down as the finish improves? You're saying the Ra should be
below 65?