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99 silverado engine noise


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Does it make the noise ONLY when you first start the truck and then disappear after about 1 to 2 minutes and not return as long as the engine is warmed up? What engine?

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While the cover is off, turn the engine with the crank bolt so you unload each valve.  Check each one for looseness.  Also might want to pull your pushrods and make sure they aren't bent.

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