Camshaft

Camshaft Bearing Journal Diameter
1. Measure each camshaft journal diameter in 2 directions.





Camshaft Journal to Bearing Clearance - OHC Engines

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 - OHC Engines





1. Using the special tool, measure the 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 a 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.





Camshaft Lobe Lift





1. Use an indicator gauge 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





1. NOTE: Camshaft journals must be within specifications before checking runout.

Using the special tool, measure the camshaft runout.
^ Rotate the camshaft and subtract the lowest indicator reading from the highest indicator reading.