Ranger 4WD V6-3.0L VIN U (1997)
1. Inspect camshaft bearing.
2. Measure the distance of each cam lobe at the major diameter.
3. Measure the distance of each cam lobe at the minor diameter.
4. For each cam lobe, subtract the minor diameter from the major diameter. The result for each lobe is the lobe lift.
Check the lobe lift for each cam lobe against the specifications.
6. If any cam lobe is worn excessively, the camshaft and tappets will have to be replaced.
