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

 

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?

 

Pics...?

 

I measured cylinder and its at 3.909

 

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

 

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

 

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

 

Ask JE. They have specs for such.

 

How could you buy pistons without knowing your clearances?