Special Tools

J 7872 Magnetic Base Dial Indicator

1. Clean the camshaft in solvent.

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

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 (206)




5. Measure the camshaft journals with a micrometer. Refer to Engine Mechanical Specifications.



6. Measure for excessive camshaft runout, using the J 7872 indicator .

6.1.	Mount the camshaft in a suitable fixture.

6.2.	Use the J 7872 indicator in order to measure for a bent camshaft. Refer to Engine Mechanical Specifications.

7. Replace the camshaft if runout exceeds specifications.



8. Inspect the camshaft bearings (1-5) for wear or damage.
9. Replace the camshaft bearings, if necessary. Refer to Camshaft Bearing Removal and Camshaft Bearing Installation.