Tool Required

J 7872 Magnetic Base Dial Indicator

1. Clean the camshaft in solvent.

Caution: Refer to Safety Glasses Caution in the Preface section.

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 gaging plastic.

Refer to Engine Mechanical Specifications .

9. Inspect the camshaft for excessive end play.
10. The camshaft bearing surfaces are machined into the cylinder head and are not serviceable.