Camshaft

Camshaft Bearing Journal Diameter
1. Measure each camshaft journal diameter in 2 directions.
^ If out of specification, install new components as necessary.





Camshaft Journal to Bearing Clearance

1. NOTE: The camshaft journals must meet specifications before checking camshaft journal clearance.

Measure each camshaft bearing in 2 directions.
^ Subtract the camshaft journal diameter from the camshaft bearing diameter.





Camshaft End Play

Special Tool(s):

1. Remove the valve tappets.
2. Use a Dial Indicator Gauge with Holding Fixture to measure camshaft end play.
3. Position the camshaft to the rear of the cylinder block.
4. Zero the indicator.
5. Move the camshaft to the front of the cylinder block. Note and record the camshaft end play.
^ If the camshaft end play exceeds specifications, install a new camshaft thrust plate.





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. Use a Dial Indicator Gauge with Holding Fixture to measure 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.