I have a 2009 GMC 5.3 with valve noise real loud on cold startup then gets quieter after running a moment but stig a lot of clicking

Asked by Roger Jul 17, 2016 at 11:02 AM about the 2009 Chevrolet Silverado 1500 LS Crew Cab 4WD

Question type: Maintenance & Repair

3 Answers
101,545

KenF answered 7 years ago

It's one of those things, you may have a mechanical problem with the valve train (lifters, valves, rockers, etc) or you may want to try some type of oil treatment. Oil returns to the pan when the engine hasn't run in a while, oil treatment may keep the heads lubricated better for that first start until the oil pump can build up pressure. A good degunking may help too. There are plenty of products to add to oil to degunk an engine. Hopefully in your case that is all you need.

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Roger answered 7 years ago

Thanks I will try the additive but I only have 41,000 miles on it and the oil was changed two weeks ago at the dealer where i bought it

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64,500

firebird338 answered 7 years ago

I agree with Ken had a bad valve tap and used Lucas Engine Oil Stablizer tap was gone after letting vehicle idle for about 45 minutes to an hour.

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