If the engine was never rebuilt, it will still have the standard ones. However, your mechanic needs to check bearing clearance on all rods and main bearings. He needs to use what is called plastigauge or a micrometer to determine the diameter of the crankshaft. If it has too much wear and you just replace the one bearing with the standard size, chances are it will be bad after a few miles and start making noise again.
The other sizes you mentioned come into play when the crank is cut / machined. As the diameter of the crank gets smaller from machining, the bearing has to be thicker to compensate for the added space.
SPONSORED LINKS
Tuesday, September 8th, 2015 AT 7:04 PM