1st Gen R53 Cooper S Most liked posts in thread: [Help] Identify this engine rattle

  1. ColinGreene

    ColinGreene Well-Known Member
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    #7 ColinGreene, Aug 16, 2015
    even if you change the tensioner, if the guides are shot you have no hope of getting it to stop.
    Run the car at idle with the belt off see if the noise continues, if so it would be a internal problem.
    While you have the belt off, spin check all the pulleys.
    Make sure if you run the car with the belt off, you have a pin through the tensioner strap to keep it from touching the crank pulley at all.
     
  2. Firebro17

    Firebro17 Dazed, but not Confused
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    #8 Firebro17, Aug 16, 2015
    Really Big Crickets.
     
  3. sethat46

    sethat46 Well-Known Member

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    #2 sethat46, Aug 16, 2015
    Belt tensioner, idler pulley, timing chain tensioner, or supercharger. Just some ideas of the usual suspects.
     
  4. MCS02

    MCS02 Moderator
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    #3 MCS02, Aug 16, 2015
    Welcome to MA!
    What sethat46 said. I would start with a new belt, belt tensioner and idler pulley first. Also check your crank pulley, make sure the rubber does not have any cracks in it.

    Some people change the belt and tensioner once a year.
     
  5. ZippyNH

    ZippyNH Well-Known Member

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    #5 ZippyNH, Aug 16, 2015
    Welcome to motoring alliance!!
    Like I said in your twin post on NAM...welcome to motoring alliance!!
    Push in your clutch....and see if it goes away...
    A throwout bearing rattle can sound like it is coming from the SC area...
     
  6. wmwny

    wmwny Well-Known Member

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    #6 wmwny, Aug 16, 2015
    Welcome to M/A! What they all said....
     
  7. MCS02

    MCS02 Moderator
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    #9 MCS02, Aug 16, 2015
    yes what he said!!
     
  8. MCS02

    MCS02 Moderator
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    #11 MCS02, Aug 17, 2015
    Get rid of the screamin demon coil packs unless you want to take the chance of frying your ECU. The OME one is good for big HP numbers.


    Your Mini looks good.
     
  9. melvinyip

    melvinyip New Member

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    #12 melvinyip, Dec 13, 2015
    Thought I'd update on this. I've did a supercharger snout rebuild. Found one of the bearings to be in rough condition. Swapped all 3 bearings out, new seal and new coupler. Knocking snd grinding Sound reduced significantly
     
  10. MCS02

    MCS02 Moderator
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    #4 MCS02, Aug 16, 2015
    Is it the stock supercharger pulley?
     
  11. melvinyip

    melvinyip New Member

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    #10 melvinyip, Aug 17, 2015
    Last edited: Aug 17, 2015
    Thank you for all the suggestions guys!
    Will check it out and update here on my findings.
    Really hope my supercharger is not fcked up in any way ��
    By the way, mine is a Aisin automatic r53

    Supercharger is stock cooper s, yet to change until I've gotten this issue fixed.
    I've gotten a sets of screamin demon coil packs as well as 17% reduction pulley from WMW, grs inter cooler, waiting to be installed..

    I'm from Malaysia and Ive just gotten my car for about 3-4 months now
    [​IMG]