Base Engine Misfire with Abnormal Valve Train Noise
WARNING: This page is about a different car, the 2004 GMC Sierra, 2004 GMC Cab & Chassis Sierra, 2004 Chevrolet Silverado, and 2004 Chevrolet Cab & Chassis Silverado. 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 | 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 not to 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. |