2. Inspect the journals for wear, scratches, corrosion and cracks.
19.3 Run a copper coin along the shaft journal - if a trace of the coin remains, the surface of the journal must be ground down
3. Run a copper coin along each of the necks several times. If the coin leaves a mark, the neck surface is very rough and needs to be ground down (19.3).
4. Remove burrs around the oil holes.
5. Inspect the crankshaft for cracks and other damage. Consult a professional to find hidden cracks.
19.6 Measure the diameter of each journal in several places to check if the journal has become conical or oval; the cylinder must be bored and new pistons and rings installed
6. Using a micrometer, measure the diameter of the crankshaft journals (19.6) in several places around the journal circumference and along its length.
7. If the crankshaft journals are damaged, have become conical or oval, contact a specialist to process the crankshaft.
8. Check the crankshaft oil seal journals for wear and damage. If the journal groove is worn or scratched, the new seal will not seal properly. Have a specialist install a smaller seal or replace the crankshaft.
9. Inspect the bearing shells.