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Thread: A rattling metal noise when idle

  1. #1
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    2002 Mazda Protege 5

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    A rattling metal noise when idle

    Anyone here have had a rattling noise when idle? Usually only happens when cold start before I start driving, but once I start driving the sound is gone. Rarely can hear that sound appear after car is out of the parking lot, but do hear it sometimes when stop at light.

    I know I probably should go through and check different parts to see where the sound is actually coming from, but just wondering if anyone had similar experiences here so I can narrow down my search?

    Thanks!

  2. #2
    Registered Member Valk's Avatar

    2003.5 MazdaSpeed Protege, 2002 Protege 5, 2003 Protege ESGT

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    for mine it was the mate between the jpipe and the midpipe. also could be a rotted/loose heatshield. i cut all mine out before i finally realized it was the exhaust mate heh.
    2003.5 Mazdaspeed protege Yellow. 138km. Retired for a complete rebuild. hibernating to prevent rust.
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  3. #3
    Registered Member

    mazda

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    The cover on my cat was rattling. I put two band clamps around it to stop the rattle.

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  4. #4
    The Diagram Dude pcb's Avatar

    2002 mazda protege 5

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    Just turn up your stereo...you won't even notice...
    The Diagram Dude

  5. #5
    Registered Member The_big_dill's Avatar


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    Exhaust heat shield, as has been mentioned.
    They call me Phil.

  6. #6
    New Family Truckster CTt3P5's Avatar
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    Do yourself a favor and just remove all of the heat shields. Or to save time, just turn the volume on the radio up as has been suggested.



  7. #7
    Registered Member kms1990's Avatar

    2011 mazda 3 hatchback GT

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    yes heat shields rattle on these cars like crazy, it maybe the motor mounts wearing out too. i just had all mine done (trying to fix a different issue) and its quieter at idle.
    Disturbed "is she not right, is she insane?"

  8. #8
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    Yea I removed the heat shield already actually, so but still going on so I guess its something else gotta go find it
    Thanks tho!

  9. #9
    Registered Member kms1990's Avatar

    2011 mazda 3 hatchback GT

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    look at your motor mounts, if they are worn (rubber inside them) then you need new ones and the car being this old you most likely do. mine were all worn out and the car was loud at idle now its quiet, my transmission was sitting on the cross-member and i think that was my rattle source.
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  10. #10
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    2003 Mazda Protege5

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    Is the heat shield needed on these vehicles? Do y'all just take 'em off and leave 'em off? Mine is rattling like crazy, it's rusted through where it bolts on, on one bolt, so it rattles at idle pretty loud...just take it off? Or should it be replaced?

  11. #11
    Team Pro5 Jackie chan's Avatar

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    Quote Originally Posted by mattzerstoren View Post
    Is the heat shield needed on these vehicles? Do y'all just take 'em off and leave 'em off? Mine is rattling like crazy, it's rusted through where it bolts on, on one bolt, so it rattles at idle pretty loud...just take it off? Or should it be replaced?
    I took all mine off years ago.

    Sent from my SM-G900T using Tapatalk

  12. #12
    The Diagram Dude pcb's Avatar

    2002 mazda protege 5

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    I keep my heat shield on under the shifter...
    Helps keep crap off the linkage...

    (all my bolts broke... it's wired on)

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