MBF Posted January 4, 2010 Report Share Posted January 4, 2010 I pulled the head on the 52 1 ton today-very low compression in #6 cylinder. I expected to find a burned and eroded exhaust valve, what I found was the valve almost appeared that it had been scored by a chisel in different places. Whoever did the engine over before I got the truck (15 yrs ago) was the last person to have the head off. It developed what sounded like a miss this summer and only had about 35 lbs on #6. Also-does the head gasket indicate leakage between cyls 1&2, and 2&3? The gasket was put on dry and came off in 1 piece. Thanks-Mike Quote Link to comment Share on other sites More sharing options...
Phil Martin Posted January 4, 2010 Report Share Posted January 4, 2010 Had a study v8 back in the 60s.pulled heads and 2 valves looked just like that.replaced them and did valve job it ran like a new one. Quote Link to comment Share on other sites More sharing options...
lugnut123 Posted January 4, 2010 Report Share Posted January 4, 2010 Maybe had a stuck valve one time and somone pulled the spark plug and tryed to bang it back downn with a chisel. I had a stuck one and loosened it that way a while back. Made that old engine purr like a kitten. Quote Link to comment Share on other sites More sharing options...
JBNeal Posted January 4, 2010 Report Share Posted January 4, 2010 Yep, looks like somebody pulled the spark plug and took a whack at a stuck valve. Head gasket marks look like leak points, but why they are there is of concern. Check that head to see if it's gotten warped due to an overheated condition. Or the head was not torqued properly and the head gasket didn't seal up. fyi, when I rebuilt the 230 in the 1 ton, several of the valves were gummed up stuck. I got them freed up & cleaned, and found that most of the valves rattled around in their guides. So I bit the bullet & replaced all valves & guides. It was a chore, but worth it...that motor purred like a tom cat at idle & pulled up any hill I aimed that beast towards. Quote Link to comment Share on other sites More sharing options...
41/53dodges Posted January 4, 2010 Report Share Posted January 4, 2010 could also be something that got into the motor somehow, like the screw-on nuts on old spark plugs Quote Link to comment Share on other sites More sharing options...
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