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Posted

I'm looking at replacing my broken piston in my 1994 400L, the book says that the piston is 3.270 inches and i've had the head measured and it's reading 3.275 inches, the adds i've seen for pistons say .020 or .080 ect, could someone please give me a better idea of exactly what it is i need.

Cheers

Andy

Posted

Your bore, which is measured in the cylinder, is .005 over stock now. The head is what goes on top of the cylinder. A .020 over piston will measure 3.3354 inches, have the cylinder bored to that size and get the .020 over piston.

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