kro10000 Posted March 21, 2010 Share Posted March 21, 2010 So we were pulling apart the 4.7L stroker from my brothers TJ and found this in one of the cylinders, a chunk is missing from one of the pistons and there are no marks on the wall from it :???: Besides random detonation in just one cylinder I can't imagine how this could happen Link to comment Share on other sites More sharing options...
jimoshel Posted March 21, 2010 Share Posted March 21, 2010 If your tearing the engine apart then replace the piston. If you just want a cheap, quick fix, polish the rough edges off the missing chip. While your at it polish the rough, pitted edge at the 2-3 O'Clock position. Rough edges get hot leading to detonation. Also gives carbon a place to build up. If I were doing it, I would replace the piston. Link to comment Share on other sites More sharing options...
kro10000 Posted March 21, 2010 Author Share Posted March 21, 2010 We plan on replacing the piston, I'm just trying to figure out how this could happen to a 35,000 mile motor Link to comment Share on other sites More sharing options...
Eagle Posted March 22, 2010 Share Posted March 22, 2010 We plan on replacing the piston, I'm just trying to figure out how this could happen to a 35,000 mile motor Is he running platinum tip spark plugs? The tips can come off, and when they do they tend to break things inside the engine -- like pistons. I won't run platinum plugs. I use only standard NGKs, and they run fine in all my Jeeps. Link to comment Share on other sites More sharing options...
kro10000 Posted March 22, 2010 Author Share Posted March 22, 2010 No he was running Champion copper plugs, the same type (albiet cooler heat range) that I run in my jeep, and he has run in his for years. Link to comment Share on other sites More sharing options...
Eagle Posted March 22, 2010 Share Posted March 22, 2010 Tell me he didn't buy the stroker engine from Clifford Performance ... Link to comment Share on other sites More sharing options...
kro10000 Posted March 22, 2010 Author Share Posted March 22, 2010 Erm no..... It was a titan, he bought it before there was much knowledge on the forums of Titan... Not really sure how they compare to Clifford, though Titan now does have a pretty poor reputation Link to comment Share on other sites More sharing options...
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