Cause | Correction |
---|---|
Worn or loose followers, valve rocker arms The follower, valve rocker arm, roller bearing should be intact and in the proper position. | Replace the followers, valve 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 chain or chains | Replace the timing chain or chains and sprockets as required. |
Worn camshaft lobes | Replace the camshaft or camshafts and SHLAs, valve lifters. |
Sticking SHLAs, lifters | Replace the SHLAs as required. |