I should have mentioned that regardless of the installation, wait a full 24 hours after applying sealant before putting any oil in the engine. Once a product like Ultra Gray sets up, it's some very tough stuff; but it can be compromised if oil contacts it while curing. No proof, but I believe that many of the leaks people are experiencing are caused by insufficient setup time.
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Mick Batson
1967 original owner Tyro Blue/black top 4-speed HO GTO with all the original parts stored safely away -- 1965 2+2 survivor AC auto -- 1965 Catalina Safari Wagon in progress.
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