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. Clean the keyway and threads, and check for damage.

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









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










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