For 1990-2009 cars

#### 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.