crankcase line boring (2.7 7R mag case)
Posted: Mon Jan 03, 2022 10:47 am
Following a dry build of the bottom end (1976 911 2.7 7R) it appears the crank is nipping up. The crank has been ground back .25mm and DTI spot on for each journal. Plastigage also shows ideal clearances.
I can only presume the case is warped, I believe best course of action is to skim the mating surfaces and line bore it (I can reuse my new std outer / .25mm inner bearings)
Anyone recommend somewhere in S. England and approx costs?
Cheers, Jack
I can only presume the case is warped, I believe best course of action is to skim the mating surfaces and line bore it (I can reuse my new std outer / .25mm inner bearings)
Anyone recommend somewhere in S. England and approx costs?
Cheers, Jack