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Old 11-27-2013, 10:38 PM   #2
Joined: Oct 2010
Location: Nor Cal, USA
Oddometer: 2,277
I went through this not long ago. First step...take the cylinders and pistons to a good machine shop and pay them to take good measurements. Max clearance is 0.120mm, which is basically huge--4.7 thousandths. If you're at 3 thou or less, flex hone them, buy next size up rings and trim ends to fit.

Oversize pistons are only for reboring to next size up.

Unless it's a race motor, button it up and run it.
1974 R90/6 w/1050 kit. Motor only. Seeking a frame.
1970 R60/5

'91 Bill Holland Steel w/Dura Ace
'01 Z3 3.0 Coupe. The Clownshoe.
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