Using solvent clean the crankshaft after which you should dry it, clean the interior of the oil holes with a stiff brush and flush with solvent. Look for misalignment spread, marks, pits and crack at the crank pin and the connecting rod big end; look for other cracks and damages on the rest of the crankshaft. The outside diameter of the main as well as the connecting rod journals should be gauged using a micrometer which should normally be of a suitable size; In the course of making these measurements, ensure that you take several measurements along the length of the journals in order to establish if there is any form of taper or conditions whereby the journals are out-of-round as compared to the specifications. Taking measurements at different positions around the circumference of the journal find whether the journal is worn to become out of round and, taking measurements from both ends find out whether the journal is tapering near the crank throw. If the crankshaft journals are off in terms of taper, out of round or worn beyond the above specified limit, s, the crankshaft will require regrounding from a reputable automotive machine shop depending on the following conditions;; The use of undersize bearing inserts if any reconditioned. If the bearing inserts and journals are in good order one is not encouraged to reuse the bearings without checking the oil clearances.