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Registered User
Join Date: Jan 2009
Posts: 10
engine rebuild

I am considering the purchase of an 1984 930 .The engine was rebuilt and a new crankshaft was installed.I have very limited knowledge of these engines .Should I be concerned that the crank needed replacing.
Old 11-12-2009, 10:13 AM
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jwasbury's Avatar
Join Date: Jan 2008
Location: Weehawken, NJ
Posts: 3,562
There are plenty of things that can go "bang" inside the engine where the crankshaft could be damaged, such as a spun rod bearing.

I wouldn't be specifically concerned about the engine getting a new crankshaft, but would be concerned about the overall quality of the rebuild.

I am in the process of rebuilding my '79 right now. During disassembly, I was surprised to find evidence of a prior rebuild...and it appears to me that the prior rebuild was not very well done. I have no idea why it was rebuilt, but I don't think that they properly cleaned things as I found scoring on the crank and rod bearings that indicate there was debris in the oil system.
Current: 1983 911 GT4 Race Car / 1999 Spec Miata / 2000 MB SL500 / 1998 MB E300TD / 1998 BMW R1100RT / 2016 KTM Duke 690
Past: 2009 997 Turbo Cab / 1979 930

Last edited by jwasbury; 11-14-2009 at 01:10 PM..
Old 11-12-2009, 10:45 AM
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