Crankshaft Inspection

Crankshaft Inspection

Out-of-Round and Taper

1. Remove the crankshaft from the engine block Crankshaft And Piston Removal.

2. Clean the crankshaft oil passages with pipe cleaners or a suitable brush.

3. Check the keyway slot and the threaded holes for damage.

4. Measure the out-of-round at the middle of each connecting rod and the main journal in two places. The difference between measurements on each journal must not be more than the service limit.

Journal Out-of-Round









5. Measure the taper at the edges of each connecting rod and the main journal. The difference between measurements on each journal must not be more than the service limit.

Journal Taper






Straightness

6. Place the V-blocks on a flat surface.

7. Check the total runout with the crankshaft supported on V-blocks.

8. Measure the runout on all of the main journals. Rotate the crankshaft two complete revolutions. The difference between measurements on each main journal must not be more than the service limit.

Crankshaft Total Runout