Question about 1998 Chevrolet C2500

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Knocking noise in the engine.

I have a 98 chevy 2500 pickup. i can hear a knocking noise in the engine during accelleration.when i accellerate the knocking increses.when i get off the gas pedal.the knocking slows down,but still knocks during idle.

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  • Anonymous Mar 15, 2014

    Knocking sound in engine compartment

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2 Answers

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Knocking Noise Is NOT a Good or Normal thing I will Not try and Diagnose it But I STRONGLY Suggest That You Stop By A Couple Service Shops For a EAR ON Check for this KNOCK and
I say A Couple Shops Meaning 3-4 So as to get The right Diagnosis

Posted on Jan 23, 2009

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  • Master
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You have a Lifter and Rocker Arm Tapping. You will need to Take off the Valve Covers and Listen for the Tap. When you Locate it Tighten Down Until it stops and then Back it off 1/8 of a Turn.

Posted on Jan 23, 2009

  • timcas68 Sep 22, 2011

    Knocking and tapping are definitely NOT the same thing.A constant knocking that is not affected by the speed of the engine could very well be piston slap or even a broken connecting rod.You would be well-advised to take the first suggestion and get it checked out ASAP continued use of the engine if it is a rod or bad bearing could be the differnece between an expensive repair vs replacing the entire engine.

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