Cause | Correction |
---|---|
Worn or incorrectly adjusted valve rocker arms The valve rocker arm and rocker arm rollers should be intact and in the proper working condition. | Adjust or replace the rocker arms, as required. |
Stuck valves Carbon buildup on the valve stem can cause the valve not to close properly. | Repair or replace, as required. |
Excessively worn or mis-aligned timing components | Replace components, as required. |
Worn camshaft lobes | Replace the camshafts, as required. |