prostock85

Planning on doing 540's in the next year or two so just trying to put together current engines on a budget. The cylinder has pitting in it due to a poorly installed intake manifold gasket that not only allowed water into engine but also had a 1/2" split in the #7 cyl. I'm planning on having that cylinder sleeved this week but was hoping I could still use this piston. It has small pitting likely due to the water that sat in it. These are 60 over JE's. Will be using all new rings.

MILD THUNDER

iTrader: (3)

I personally wouldn't use it. You can just buy 1 piston

prostock85

Thats what I was thinking, my only problem is I don't know exactly what I have. I know its 4.530" and has a 6.135 rod. Hopefully thats enough for JE to get me one. Its pre 04 so there are no markings except casting number.

FIXX

iTrader: (2)

looks like salt water dammage,,like mentioned i would not use it..if they are je castings inside then sent it to them and they can match it..

sonicss42

Correct me if i'm wrong but shouldn't he weigh the old one vs the new one and have them matched in weight?

FIXX

iTrader: (2)

yes,,one reason to send it in if theirs no part number to go by..

f_inscreenname

Not with the side skirt being damaged. I would be getting a new piston.

phragle

iTrader: (3)

two questions.....

1) how much is a new piston???

2) how much is it going to cost to rebuild the motor if the piston comes apart at WOT and the rod is bouncing around???

Young Performance

As mentioned, replace the piston. Based on the specs you gave, the piston should have a compression height of 1.645 (9.8 block, 6.135 rod). It's just a standard JE flat top in 4.530 bore. Order part # 257985.
Eddie

motor

iTrader: (3)

I'd use that piston .Saw it through the wrist pin hole and make an ashtray