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Apr 26th, 2026 | | AD Chevy Trucks  Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
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| | | | Joined: Aug 2004 Posts: 1,067 Shop Shark | | Shop Shark Joined: Aug 2004 Posts: 1,067 | A blown head gasket can be minor enough that you won't get a cumulus cloud behind you. However, I wouldn't use any kind of a stop leak because the leak will only get worse. I would plan on changing your head gasket.
It's really not hard on the straight six. A warning though, make sure you check not only your head for warpage, but also your block. My 235 had both the head AND the block warped, so when I had the head milled, the leak was worse than ever...with a perfect head gasket. I didn't see that coming and was disappointed that I had to yank the 235 out of there.
52 GMC 3/4 ton pickup
68 Big Block Vette
68 455 Firebird
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