39. Camshaft and Bearings Cleaning and Inspection

Camshaft and Bearings Cleaning and Inspection

Tools Required

J 7872 Magnetic Base Dial Indicator

1. Clean the camshaft in solvent.

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

2. Dry the camshaft with compressed air.




3. Inspect the camshaft retainer plate for damage.




4. Inspect the camshaft for the following conditions:

* Camshaft bearing journals (1) that are:

- Worn
- Scored
- Damaged

* Worn camshaft lobes (2)
* Damaged sprocket bolt threads (3)
* Damaged sprocket pin (4)




5. Measure the camshaft journals with a micrometer. Refer to Engine Mechanical Specifications (LP4 (VIN D)) Engine Mechanical Specifications (LP4 (VIN D))Engine Mechanical Specifications (L21(VINB)) Engine Mechanical Specifications (L21(VINB)).
6. Measure for a bent camshaft or excessive camshaft runout using J 7872 .

1. Mount the camshaft in a suitable fixture.
2. Use the J 7872 in order to measure for a bent camshaft. Refer to Engine Mechanical Specifications (LP4 (VIN D)) Engine Mechanical Specifications (LP4 (VIN D))Engine Mechanical Specifications (L21(VINB)) Engine Mechanical Specifications (L21(VINB)).

7. Replace the camshaft if runout exceeds specifications.




8. Inspect the camshaft bearings (1-5) for serviceability.
9. Replace the camshaft bearings if necessary. Refer to Camshaft Bearing Removal 38. Camshaft Bearing Removal and Camshaft Bearing Installation 40. Camshaft Bearing Installation.