2. Inspect the crankshaft bearings for wear, scratches, corrosion or cracks.
3. Remove burrs around the oil holes and clean the holes with solvent.
4. Inspect the crankshaft for cracks or other damage.
5. Measure the diameters of the main and connecting rod bearings. To detect taper and out-of-roundness, measure the diameter of each bearing at several points. If necessary, the crankshaft must be processed in a specialized workshop.
6. Check the crankshaft oil seal journals for signs of wear or damage. If the seals have worn through the grooves on the journals, then the new seals will leak oil.
7. Measure the thread length of each main bearing cap bolt. In four-cylinder engines, the bolt threads must be no longer than 67.5 mm, and in six-cylinder engines, no longer than 136 mm (for long bolts) and 119 mm (for short bolts), otherwise the bolts must be replaced.
(The full text is on the website: MAZBOOK)