CHEAP rebuild question

[Anonymous_User]

I might need to do a CHEAP rebuild. I don't want to touch my CB 2.5 yet as it will get forged pistons. I have an '86 shortblock with a burnt #4 piston.

I've done plenty of re-ring jobs before, just not for a forced induction motor. If I simply hone and install new rings (of course, I'll pop in a used piston for #4), will I get enough ring seal? Or should I really think about boring it .020 and installing a set of Mahle's?

What is the stock bore, and what tolerance? I'll measure the bores to see what kind of piston-wall clearance I'll have with stock pistons.

Yes, I will install new bearings and gaskets.

[Boost_Virgin]

I can't answer your question, but keep me in mind when you are looking for rings. I have a set of .030 over rings for sale cheep.

[jckrieger]

Hone and re-ring. I've done this in a motor 3 times in the same hole and it sealed up just fine. Never had more than a 5psi variation between cylinders during a compression test.

[Anonymous_User]

Thanks. I don't want to do a half --- job on the 2.5 CB and I don't want to spend money on a 2.2 non CB. So, standard rings and bearings it is.

[mech1nxh]

Hone and re-ring. I've done this in a motor 3 times in the same hole and it sealed up just fine. Never had more than a 5psi variation between cylinders during a compression test.

have to agree ...I have even bored ONE cyl only (customer had to have vehicle
and just did not have the money for more machine work) ..unless the cyl is totally FUBAR...(taper /out of round)...hone it ring it run it!!!

[turbo xtc]

i did that on my 2.5 it lasted the summer but i have the num 4 knock again at least i got more time with the tops off then i did last year