Camshaft and Bearings Cleaning and Inspection: Cleaning
WARNING: This page is about a different variant/trim than selected.
- Clean the components in solvent.
- Dry the components with compressed air.
- Inspect the camshaft bearing journals (1) for scoring or excessive wear.
- Inspect the camshaft valve lifter lobes (2) for scoring or excessive wear.
- Inspect the threaded bolt hole (3) in the front of the camshaft for damaged threads or debris.
- Inspect the camshaft sprocket pin (204) for damage.
- Inspect the camshaft retainer plate for wear or a damaged sealing gasket.
If the camshaft retainer plate sealing gasket is not cut or damaged, it may be used again.
- Inspect the camshaft bearings for the following:
- Excessive wear or scoring. The presence of the copper color bearing material should be considered normal and not a guideline for bearing replacement. Measure the bearing inside diameter (ID) as required for an over-sized condition. Refer toEngine Mechanical Specifications .
- Proper fit in the engine block. Camshaft bearings have an interference fit to the engine block and should not be loose in the engine block bearing bores.
- Oil lubrication hole plugged by debris.
Bearings with excessive wear or scoring must be replaced.
- Using a micrometer, measure the camshaft journals for wear and out-of-round.
- If the camshaft bearing journals are greater than 0.025 mm (0.001 in) out-of-round, replace the camshaft.
- If the camshaft bearing journal diameter is less than 54.99 mm (2.164 in), replace the camshaft.
- Using a micrometer, measure the camshaft lobes for wear. Refer to Engine Mechanical Specifications .
- Measure the camshaft runout.
- Mount the camshaft in wooden V-blocks or between centers on a fixture.
- Using the J 7872: set , measure the runout of the intermediate camshaft bearing journals.
- If camshaft runout exceeds 0.05 mm (0.002 in), the camshaft is bent and should be replaced.
WARNING:
Refer to Safety Glasses and Compressed Air Warning
.