Tools Required

J 7872 Magnetic Base Dial Indicator Set

1. Clean the camshafts with cleaning solvent.
2. Inspect the camshafts for the following conditions:

•	Scored camshaft journals

•	Damaged camshaft lobes

•	Damaged camshaft sprocket locator slots

•	Damaged threads

3. Measure the camshaft lobes using a micrometer. The intake camshaft lobes should be a minimum of 41.5 mm (1.635 in). The exhaust camshaft lobes should be a minimum of 41 mm (1.615 in).



4. Use J 7872 to measure the camshaft runout.

4.1.	Set the camshaft in V-blocks between the centers.

4.2.	Measure the intermediate camshaft journal.

5. Use J 7872 to measure the camshaft lobe lift.

5.1.	Lubricate the camshaft to V-block contact areas with engine oil.

5.2.	Set the camshaft on V-blocks.

5.3.	Measure the camshaft lobe lift.

6. If the runout or camshaft lobe lift is not within specifications, replace the camshaft.