|
Removing or replacing the crank is an engine out situation. Since the bearings already spun and bearing material has been distributed throughout the engine, it would be very unwise to replace only the crankshaft. Every time I've seen that attempted I see the owner showing up later wondering why they're having Vanos or other issues. A spun bearing is supposed to be a full rebuild situation. Anything less is taking shortcuts and major risks.
Additionally, these crankshafts are surface hardened. If you grind them you need to re-harden them. Odds are you'll have to grind oversize = buying oversize bearings. Majority of machine shops aren't equipped to harden, so by the time you pay to have it cut, hardened, and buy the oversized bearings, you might as well find a used unmolested crank.
|