For 1990-2009 cars

### Cleaning Procedure

1. Clean the camshaft in solvent.

Warning: Refer to Safety Glasses and Compressed Air Warning in the Preface section.

2. Dry the camshaft with compressed air.

### Visual Inspection

1. Inspect the camshaft drive sprocket thread hole (1) for damage.
2. Inspect the camshaft lobes (2) and journals (5) for the following conditions:

• | Excessive scoring or pitting

• | Discoloration from overheating

• | Deformation from excessive wear, especially the camshaft lobes

3. Inspect the camshaft thrust surface (3) for damage.
4. Inspect the camshaft position rotator (4) for damage.
5. Inspect the camshaft sealing surface (6) for damage.

### Camshaft Measurement

1. Measure the camshaft journals for diameter and out-of-round using an outside micrometer.
2. Compare your results with Engine Mechanical Specifications.

• | If the diameter is smaller than specifications, replace the camshaft.

• | If the out-of-round exceeds specifications, replace the camshaft.