Crankshaft and Bearing Clean and Inspect

^ Tool(s) Required
- J 7872 Magnetic Base Dial Indicator Set





Important: Use care when handling the crankshaft. Avoid damage to the bearing surfaces.

Caution: Wear safety glasses in order to avoid eye damage.

1. Clean the crankshaft with solvent.
2. Thoroughly clean all oil passages and inspect for restrictions or burrs.
3. Dry the crankshaft with compressed air.
4. Perform a visual inspection of the crankshaft for damage.





5. Inspect the crankshaft journals for wear (1). Journals should be smooth with no signs of scoring, wear, or damage.
6. Inspect the crankshaft journals for grooves or scoring (2).
7. Inspect the crankshaft journals for scratches or wear (3).
8. Inspect the crankshaft journals for pitting or imbedded bearing material (4).





9. Measure the crankshaft journals for the following. Refer to Engine Specifications.
^ Out-of-round
^ Taper





10. Measure the crankshaft runout. Using wooden V blocks, support the crankshaft on the front and rear journals.
11. Use the J 7872 in order to measure the crankshaft runout at the front and rear intermediate journals.
12. Use the J 7872 in order to measure the runout of the crankshaft rear flange.
13. Replace the crankshaft if the measurements are not within specifications.