Camshaft Lobe Lift

NOTE: If camshaft journals are excessively worn or scored, replace the camshaft. The cylinder head bearing journals can be refinished to accommodate 0.5 mm (0.020 inch) oversize camshaft. If the cylinder head journals cannot be bored out 0.5 mm (0.020 inch), replace the cylinder head (6049).

1. Inspect the camshaft journals on the cylinder head and camshaft carriers caps. If excessive wear or galling is present, replace cylinder head.
2. Check camshaft bores for size, taper, roundness, alignment and finish. If any of these exceed the limits given in Specifications, rebore cylinder head to accept oversize camshaft or replace cylinder head.





3. Inspect the camshaft lobes for scoring and signs of abnormal wear. Lobe pitting (except in the general area of the lobe toe) will not hinder operation of the camshaft. The camshaft should not be replaced unless the lobe lift loss has exceeded specification, or pitting has occurred in the lobe lift area.