Question about 2006 Hummer H3

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ONLY HAPPENS WHEN THE VEHICLE IS COLD START...SUMMER OR WINTER....AFTER A FEW MINUTES, THE CLICKING SOUND WILL STOP...ENGINE SOUNDS SMOOTH...WHAT IS THAT CLICKING AT START UP?.

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  • samkelly
    samkelly Nov 09, 2012

    ENGINE IS A 3.5 LTR (FYI)

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It sounds like you may have a hydraulic lifter that is slow to pump up. Add a can of Berrymans Chemtool to the oil just before the next oil change, if it a dirt issue then the chemical should flush it loose. You really need a ears on listen to this to be sure my guess is correct.

Posted on Nov 09, 2012

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