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Re: I need a foolproof head seal on H
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Posted by lee on September 04, 2004 at 12:36:14 from (24.24.95.246):
In Reply to: I need a foolproof head seal on H posted by Red Dread on September 04, 2004 at 12:08:53:
the head must be flat, did you have it milled flat or checked for flat? The deck surface must be flat. Remove all the bolts (studs?) and check it for flat with a good long straight edge. Straight edge should pe perfectly straight and probably at least 20 inches long, longer better. You should see no light under that straight edge anywhere on the deck. Check it lengthwise, across the width and diagonally. If you see light check it with a feeler gage to determine width of gap. I don't know the spec or what you are working on but I'd look for no more than .002 max. Studs or head bolts that tap into a water jacket should be sealed with a good engine assembly grade thread seal compound. Two coats copper I would not do. I usually get everything pristine clean, no oil, final clean with solvent. Wipe with white cloth should come up clean. No sealant, just assemble dry. If you think you need a sealant go very thin coat only. These are my thoughts. As opinions vary, your crop yield may also vary.
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