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Home >> Cadillac >> 2006 >> STS Base, 3.6 7, RWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 18 (Engine Mechanical - 4.4L - Introduction) >> Diagnostic Information and Procedures >> Base Engine Misfire with Abnormal Valve Train Noise

Base Engine Misfire with Abnormal Valve Train Noise

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Base Engine Misfire with Abnormal Valve Train Noise

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 chains or components Replace the primary timing chain, secondary timing chains, intermediate sprocket, camshaft position actuators and/or related timing components as required.
Worn camshaft lobes Replace the camshaft or camshafts and stationary hydraulic lash adjusters (SHLAs), valve lifters.
Sticking SHLAs, lifters Replace the SHLAs as required.