- Location
- Near Rochester NY
I would appreciate knowing what pistons people have used to rebuild their stock (non-stroker) engines.
I chose the OEM Tech forum, since the only possible modification I will do is aftermarket pistons. If the moderator thinks this belongs someplace else, go ahead and move it.
I have a bone stock 2000 XJ 4.0 that I have driven with a piston slap for the last 5K miles. At 162K miles the head cracked, so I need to replace that. I took the pan off and found (not surprisingly) the skirt broken off piston #5. All cylinder walls show very little wear. I will mic the bores after I get the head off. I hope to do this work with the block in the XJ. I am reluctant to replace just this one piston with another factory piston, because of their reputation for cracking. I will probably replace them as a set, to keep consistent compression ratios on all cylinders.
When I look at all the available aftermarket pistons, I see the ones with the tallest compression height are still .009" lower in the block than the factory pistons. If I install the .043" MLS gasket, I still will loose 0.2 on the CR, because of the increased dish volume. I really don't want to mill the block. If I was to go to that trouble, I should just start looking for a 258 crank.
What pistons have you used in a stock rebuild?
I chose the OEM Tech forum, since the only possible modification I will do is aftermarket pistons. If the moderator thinks this belongs someplace else, go ahead and move it.
I have a bone stock 2000 XJ 4.0 that I have driven with a piston slap for the last 5K miles. At 162K miles the head cracked, so I need to replace that. I took the pan off and found (not surprisingly) the skirt broken off piston #5. All cylinder walls show very little wear. I will mic the bores after I get the head off. I hope to do this work with the block in the XJ. I am reluctant to replace just this one piston with another factory piston, because of their reputation for cracking. I will probably replace them as a set, to keep consistent compression ratios on all cylinders.
When I look at all the available aftermarket pistons, I see the ones with the tallest compression height are still .009" lower in the block than the factory pistons. If I install the .043" MLS gasket, I still will loose 0.2 on the CR, because of the increased dish volume. I really don't want to mill the block. If I was to go to that trouble, I should just start looking for a 258 crank.
What pistons have you used in a stock rebuild?