42. Camshaft and Bearings Cleaning and Inspection

Camshaft and Bearings Cleaning and Inspection

Tool 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 for the following conditions:
- Worn, scored, or damaged bearing journals.
- Worn camshaft lobes.
- Damaged sprocket pin.






4. Measure the camshaft journals with a micrometer 27.939-27.960 mm (1.099-1.101 in).
5. Measure for a bent camshaft or excessive camshaft runout using J 7872.
5.1 Mount the camshaft in V-blocks between centers.
5.2 Use the J 7872 in order to measure for a bent camshaft. Radial runout 0.06 mm (0.0023 in).
6. Replace the camshaft if runout exceeds specifications.
7. Inspect the camshaft bearings and bearing cap surfaces for the following:
- Wear
- Scoring
- Overheating from lack of lubrication
8. Inspect the bearing clearances with gauging plastic.
- Refer to Engine Mechanical Specifications.
9. Inspect the camshaft for excessive end play 0.038-0.051 mm (0.001-0.002 in) 0.04-0.144 mm (0.002-0.006 in).
10. The camshaft bearing surfaces are machined into the cylinder head and are not serviceable.