Mechanics

ENGINE KNOCK ON COLD START

2002 Chevrolet Silverado • V8 4WD Automatic •

2002 Chevrolet Silverado 1500 4WD with a 5.3L engine, 93,000 miles. When starting with the engine cold (sitting overnight or longer), there is a knocking noise (reminds me of lifter tap) that lasts for 2-3 minutes before fading away. Oil pressure shows fine. This started about a year ago. Any suggestions?
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Trafgod
March 19, 2011.




Sounds like a valve lifter leakdown problem

Tiny
Rasmataz
Mar 19, 2011.


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