Car making loud metal sound while it's idling?

8 Answers

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  • 2 months ago

    Not really, If you would have other problem than it will make sound

  • Anonymous
    2 months ago

    Car is basically ALL METAL SO YOU ARE GOING TO HAVE TO NARROW IT DOWN FOR US TO EVEN GUESS.  Let the car run and get outside of the car and pop the hood.  Maybe almost dead mechanic is lying there? Or in the boot?

  • 2 months ago

    Heat shield catalytic converter input check bearing on a standard stick shift transmission loose grill loose hood  Bearings spray some water on the pulleys on the serpentine belt try some aerospace 303

  • GF
    Lv 5
    2 months ago

    Rattling is usually a heat shield and the rivets broke. This causes it to vibrate and rattle like a pebble in a can 

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  • Anonymous
    2 months ago

    What's a "metal sound"? That's too vague. You also didn't say where the sound is coming from. FAlL

  • 2 months ago

    You need to figure out if the noise is from the drive belts and pulleys first. Remove the drive belts and start the motor to see if the noise is gone. if the noise is gone spin the pulleys and alternator to find out if the bearings are dry or noisy. If the noise is still there it's likely coming from a timing belt pulley or timing chain.

  • 2 months ago

    Could be an idler pulley the bearings are wearing out in and it is wobbling against the engine block. Could also be a bad catalytic converter. They will tend to rattle when the catalyst inside the converter breaks up, if it is a metal rattle you are hearing. If it sound like a hammer knock, either light hammer tap on metal or a heavy metal tap on metal it could be a push rod knocking inside the engine. Lots of things it could be. Cross your fingers that it isn't a rod knock.

  • CB
    Lv 7
    2 months ago

    Likely an exhaust hanger that is broken and the engine miss you have been ignoring because you thought the check engine light meant the car needed and oil change is making the exhaust swing into something. Time to put on the emergency brake and put it in park. get out of the idling car, pop the hood and LOOK for where the sound is coming from  - if not under the hood start crawling around looking under the car for the sound - **** is going to be HOT so don't grab anything without good gloves on. see if you can detect the source of the noise. 

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