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Old 04-03-2019, 07:05 PM   #26 (permalink)
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Originally Posted by Piotrsko View Post
Hence my comment about head gaskets.

3 thou on 24" is considered to be flat tolerances for a Cincinnati mill. You can probably move the head that much by hand. So you ignore the proper torque sequence and tighten the odd spot first.

Went back to the first post, missed the reason for disassembly. I saw where it was said the gasket was blown, but how was it diagnosed? Compression test or puking fluids or internet?
This is what I figured. Three thou is as good a flatness as you'll get on a surface that large with any milling process. A ground surface can usually hold sub one thou but even that would be tough over such a large area.
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