28. Camshaft Clean and Inspect

^ Tool(s) Required
- J 7872 Magnetic Base Dial Indicator Set
- J 26900-2 Outside Micrometer





1. Inspect the camshaft journals and lobes for wear, damage or scoring (1, 2).





2. Using an outside micrometer, measure the height of the intake and exhaust lobes.
^ Standard Camshaft Intake Lobe Height: 36.171-36.331 mm (1.4241-1.4303 inch)
^ Minimum Camshaft Intake Lobe Height: 36.071 mm (1.4202 inch)
^ Standard Camshaft Exhaust Lobe Height: 36.356-36.516 mm (1.4314-1.4376 inch)
^ Minimum Camshaft Exhaust Lobe Height: 36.256 mm (1.4275 inch)
3. If any of the camshaft lobes measured are not within the required specifications, the camshaft must be replaced.





4. Place the camshaft in two V-Blocks and use a dial indicator to measure the runout of the camshaft.
Camshaft Runout:
Maximum = 0.10 mm (0.0039 inch)





5. Inspect the cylinder head for scoring in the camshaft journals.





6. Inspect the camshaft journal caps for scoring (1).
7. Clean the cylinder head.
^ Wash the cylinder head in solvent.
^ Inspect the cylinder head for cracks or other signs of damage.