Camshaft
Camshaft Bearing Journal Diameter1. Measure each camshaft journal diameter in 2 directions.
^ If out of specification, install new components as necessary.
Camshaft Journal to Bearing Clearance
Special Tool(s):
NOTE: The camshaft journals must meet specifications before checking camshaft journal clearance.
1. Remove the camshaft bearing cap and lay Plastigage across the surface.
2. NOTE: Do not turn the camshaft while carrying out this procedure.
Position the camshaft bearing cap and install the bolts.
3. Use Plastigage to verify the camshaft journal clearance.
^ If out of specification, install new components as necessary.
Camshaft End Play
Special Tool(s):
1. Use a Dial Indicator Gauge with Holding Fixture to measure camshaft end play.
2. Position the camshaft to the rear of the cylinder head.
3. Zero the indicator.
4. Move the camshaft to the front of the cylinder head. Note and record the camshaft end play.
^ If camshaft end play exceeds specifications, install new camshaft and recheck end play.
^ If camshaft end play exceeds specification after camshaft installation, install a new cylinder head.
Camshaft Surface Inspection
1. Inspect camshaft lobes for pitting or damage in the contact area. Minor pitting is acceptable outside the contact area.
^ If excessive pitting or damage is present, install new components as necessary.
Camshaft Lobe Lift
Special Tool(s):
1. Using the special tool, measure the camshaft intake/exhaust lobe lift.
^ Rotate the camshaft and subtract the lowest indicator reading from the highest indicator reading to figure the camshaft lobe lift.
Camshaft Runout
Special Tool(s):
1. NOTE: Camshaft journals must be within specifications before checking runout.
Use a Dial Indicator Gauge with Holding Fixture to measure the camshaft runout.
^ Rotate the camshaft and subtract the lowest indicator reading from the highest indicator reading.
^ If out of specification, install new components as necessary.
