Question about 2002 Chevrolet Blazer

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Experiencing a "ticking" "knocking" type noise when 1st starting the car in colder weather that goes away once the blazer warms up , any help ?? I was told it could be the exhaust manifold , or piston slap, or blown engine. This question is in RE: 2002 Chevrolet Blazer LS 6 Cyl 4.3L Im leaning to the exhaust manifold. A engine KNOCK does not go away when the car warms up. I was told piston slap is real qiuet and my noise is rather loud for a few minutes till car warms up , then it completely goes away.

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  • Anonymous Oct 26, 2009

    Can the lifters/valves be adjusted ?? or do they need to be replaced ?? If I let it go can I do harm to my blazer ??



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It may need a lifter or valve adjustment when cold they will tick or knock depending on how loose or worn out then when it warms up they swell with heast and noise stops. after adjusting or replacing it will stop making noise

Posted on Oct 26, 2009

  • james kilgore
    james kilgore Oct 26, 2009

    some have to be replaced , but honestly i wouldnt worry about it until it is always ticking it can affect fuel economy but not to bad if it gets real bad it can affect performance . but when you notice any big changes then get it fixed its a pretty simple repair if you have mechanical ability. but until its worse leave it alone say if you hear it tapping when at around thre thousand rpm then i would repair it.



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