Quote:Tools:
* 2-inch outside Micrometer to measure journals (43 to 50 mm range required)
* feeler gauges to measure bearing crush and end-play
* Plastigage to measure clearance

The good news is that an A12 almost never needs oversize bearings. You already know this, but for the newbies reading this: only if the crankshaft is damaged, then the crank is machined smaller and oversize bearing fitted. So examine the crank journals, if there is no obvious wear then you can simply replace worn bearings with the same size.

To measure your crank to find out if it uses standard bearings or oversize, use a precision micrometer to measure each (and every) rod journal, and each main bearing journal.

Also see Bearings

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