Worn or loose rocker arms

Repair or replace the valve rocker arms, as required.

Worn or bent push rods

Replace the push rods.

Sticking valves

Carbon buildup on the valve stem and/or seat can cause the valve to not close properly.

Repair or replace, as required.

Excessively worn or mis-aligned timing chain

Repair or replace the timing chain, camshaft retainer, and sprockets, as required.

Worn camshaft lobes

Replace the camshaft and valve lifters.

Sticking lifters

Replace, as required.