Base Engine Misfire with Abnormal Valve Train Noise
WARNING: This page is about a different car, the 2004 Pontiac Aztek and 2004 Buick Rendezvous. However, it is still accessible from the selected car via links, so may be relevant.
Base Engine Misfire with Abnormal Valve Train Noise
| Cause | Correction |
|---|---|
| Worn or loose rocker arms The rocker arm bearing end caps and/or needle bearings should intact within the rocker arm assembly. |
Replace the valve rocker arms as required. |
| Worn or bent pushrods | Replace the pushrods. |
| 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 and valve lifters. |
| Sticking lifters | Replace as required. |