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Old 04-12-2022, 05:46 PM   #1
Steeveedee
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Join Date: Jan 2013
Location: Simi Valley, CA
Posts: 10,946
Re: Valve seals

If you're going to use the thin steel gaskets, make absolutely certain that the block is flat. Get a known good straightedge and check it all with a feeler gauge on each bank. Every single bit of crud on the deck has to be gone. Otherwise, you may develop a leak- coolant or compression, depending. The heads are new, so ostensibly flat, but I'd check them as well.
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'70 Chevy 3/4T Longhorn CST 402/400/3.56 Custom Camper

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