Q&A for How to Stop a Car from Knocking

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  • Question
    How do I stop my car from knocking?
    Community Answer
    Community Answer
    Follow the instructions listed in the article above.
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  • Question
    What should I do if I can't get the knocking to stop?
    Doug Fontaine
    Doug Fontaine
    Community Answer
    If your car has a rod knock, chances are are this engine will need very expensive repair or replacement.
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  • Question
    My car just started stalling and making a knocking sound. It had no oil, so I topped it off, but it still rattles. Can it be saved?
    Community Answer
    Community Answer
    It's done; it needs a new/rebuilt engine. Your rod bearings and main bearings are probably gone.
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    Not Helpful 6 Helpful 8
  • Question
    How do I fix the knocking completely?
    Doug Fontaine
    Doug Fontaine
    Community Answer
    Once an engine starts to knock, the damage is already started. Repair (expensive) at a minimum is about the only recourse.
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  • Question
    What would cause a motor to knock one time and not the next time I start it?
    Community Answer
    Community Answer
    Your harmonic balancer may be getting old. It can cause the timing to bounce around. Check your timing with a light.
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