Camshaft Inspection

CAMSHAFT INSPECTION

Camshaft Inspection





1. Inspect camshaft lobes for pitting or damage in the active area. Minor pitting is acceptable outside the active area.





2. Measure diameter (A) and diameter (B) with a vernier caliper. The difference in measurements is the lobe lift.





3. Measure each side of the lobe for even wear.





4. Use the Dial Indicator With Bracketry to measure the camshaft runout.
(1). Rotate the camshaft and subtract the lowest dial indicator reading from the highest dial indicator reading.

Note
^ Camshaft journals must be within specifications before checking runout.

Camshaft Oil Clearance Inspection





1. Measure each camshaft journal diameter in two directions. If out of specification, replace as necessary.





2. Measure the camshaft bearings in two directions.
(1). Subtract the camshaft journal diameter from the camshaft bearing diameter.

Note
^ The camshaft journals must meet specification before checking camshaft journal clearance.

Camshaft End Play Inspection





1. Install the Dial Indicator With Bracketry to measure camshaft end play.
2. Position the camshaft to the rear of the cylinder head.
3. Zero the Dial Indicator With Bracketry.
4. Move the camshaft to the front of the cylinder head. Note and record the camshaft end play.
(1). If camshaft end play exceeds specifications, replace the camshaft thrust plate.