i just got an ls block and it has about 140,000 miles on it. i want to use my pr3 pistons in it and aside from regular wear after that kind of milage it doesn't seem to have any problems. i was wondering if i can just hone it and use new rings or should i bore it out and get different pistons?

 

hone it if you bore it then u need to buy oversized pistons but its all up to u

 

you're going to have to mic the cylinder walls to know for sure. If the pistons have worn a taper into the cylinder walls, you're going to have to bore it. A good manual will show you how to take readings properly and what the minium variance should be.

 

For having 140,000 miles i would just overbore .25mm then go with oversized PR3's... Nice clean cylinder walls to work with..

 

bruck mic'ing, just overbore .050 and get .050 over pistons.


[Modified by builthatch, 5:28 PM 11/14/2002]