43. Camshaft and Bearings Clean and Inspect

- Tools Required
- J7872 Magnetic Base Dial Indicator

1. Using a soft cloth and clean solvent, clean the camshaft. Do not scratch the camshaft bearing journals or lobes.

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

2. Using compressed air, dry the camshaft.
3. Using a soft cloth and clean solvent, clean the camshaft bearing inserts. Do not scratch the camshaft bearing inserts.
4. Inspect the camshaft for cracks using the Magnaflux Spot-check dye method or the equivalent.





5. Inspect the camshaft for the following conditions:
- Scoring (1)
- Nicks (1)
- Worn camshaft lobes (2)
- Damaged sprocket bolt threads (3)
- Damaged sprocket pin (4)
- Damage caused by lack of lubrication

6. Inspect the camshaft bearing inserts for the following conditions:
- Scoring
- Nicks
- Damage caused by lack of lubrication





7. Inspect the camshaft retainer plate for damage.





8. Using a suitable measuring device, measure the camshaft journal diameter and taper in several places, approximately 90 degrees apart.
9. Measure for a bent camshaft or excessive camshaft runout using J7872.
9.1. Mount the camshaft in V-blocks at camshaft journals one and five.
9.2. Using the J7872 Magnetic Base Dial Indicator, measure camshaft journal runout at camshaft journal three.
10. Replace the camshaft if runout exceeds specifications.