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Crankshaft tolerances.
Hi guys. I am restoring a 1978 911 SC and it is time to stare re-assembling the engine. I miked all the journals on the crank shaft and they are right at the bottom of the allowable limit. The Bently manual states for the lower limit 2.3611 for the mains and I have for the six mains +.0003, +.0001, +.0002, .0000, +.0002 and -.0001 above and below that limit. On the rods the Bently manual states for the lower limit 2.0855 for the rods and I have for the six rods .0000, +.0002, -.0001, -.0001. -.0001,.0000 and -.0001 above and below that limit. All the journals are round and have no grooves worn in them that I can see or feel. Could I polish them a bit with some fine crokus cloth and put in a new set of srandard bearings? Are there available beasings a few ten thousands over size? If I need a regrind to whom could I send the shaft that can give it the proper heat treatment to bring back the required hardness. Thanks, John
1964 356 SC
1978 911 SC
1982 911 SC
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