Base Engine Misfire with Abnormal Valve Train Noise
| Cause | Correction |
|---|---|
| Worn or loose valve rocker arms The rocker arm needle bearings should be intact within the rocker arm assembly. |
Replace the 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 | Replace the timing chain and sprockets as required. |
| Worn camshaft lobes | Replace the camshaft, valve lash adjusters, and rocker arms. |
| Sticking valve lash adjusters | Replace as required. |