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Generation III Internal Engine
#7 cylinder melted side of piston

Generation III Internal Engine 1997-2006 LS1 | LS6

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#7 cylinder melted side of piston

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Old

Jul 21, 2014 | 06:49 AM

#1

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#7 cylinder melted side of piston

I have an 02 ls1 that melted #7 piston when I took engine out and disassembled it I didn't see any damage in cylinder so I ordered a standard engine kit I then put top ring in cylinder to check end gap to find it at .035 so my question is since that is only cylinder that is wore could I get away with installing a .010 oversized set of rings and grind to fit them or will I have other problems

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Jul 21, 2014 | 08:46 AM

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Melted #7 is fairly common when you're running on the lean side. I'd look at the AFR. If you get your injectors flow rated always put the richest one on #7. Don't understand why that cylinder would have "grown". Have you measured the bore besides comparing to that ring?

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Jul 21, 2014 | 06:05 PM

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Pics...?

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Jul 21, 2014 | 06:32 PM

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I measured cylinder and its at 3.909

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Jul 21, 2014 | 07:01 PM

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That's .011 over. Measure the other cylinders too. Something is up with that engine.

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Jul 21, 2014 | 07:44 PM

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Sounds like it's been honed out before. . .

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Jul 24, 2014 | 06:40 PM

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ok so I got a set o je pistons my next question is what kind of clearance should there be for a set of forged pistons

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Old

Jul 24, 2014 | 10:08 PM

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Ask JE. They have specs for such.

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Old

Jul 25, 2014 | 01:42 AM

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How could you buy pistons without knowing your clearances?

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