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Grinding sound with air con on

Discussion in 'Mitsubishi Lancer Owners Club' started by yawn, Feb 25, 2011.

  1. yawn

    yawn Senior Member
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    Hey guys,

    Wondering if any of you have experienced this before. When I turn my air con on there is a sort of whirring/ grinding sound coming from around the middle of the engine bay, more towards the drivers side. It's quite bad and I can feel the whole car vibrating when it happens.

    Now it sometimes happens with the air con off as well, but only once every 30 mins or so, for about 2 mins. But it will def be there when the air con is on and stops immediately when I switch the air con off.

    It definitely sounds and feels like a rotating part, kind of like a loose fan sound. Definitely not my radiator fan though.

    I've been told it may be a loose part in my clutch or something along those lines but wanted to get a few of your opinions first before pulling the clutch out.

    Thanks in advance :D
     
  2. tks

    tks Senior Member
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    They might have meant your AC compressor magnetic clutch...get it checked.

    Cheers.
     
  3. yawn

    yawn Senior Member
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    Hmm I never knew such a part existed. Haha but is it possible for it to make the noise even when the air con is off, if it's the compressor?
     
  4. jimmyae101

    jimmyae101 Senior Member
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    confirm,u may check air compressor inside...got bearing on there.and check also outside engine bay air con compressor,check by using scew driver hearing when on air con got noise or not.any diffrent when off or on air con.help it can helping u check list.:driver:
     
  5. tks

    tks Senior Member
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    [​IMG] the assembly looks something like this...those 2 pieces have barely a millimeter in between them when put together. pulley is free spinning, outer part is the clutch that's connected to the compressor. when u turn the a/c on, the *tak* sound u hear is the clutch sticking (magnet on!) on to the spinning pulley to spin the compressor to work your a/c.

    Sometimes for whatever reason these two get too close and may rub, hence cause the noise you're hearing even when the a/c is off.


    Remember tho, this is just a guess, your mechanic should be able to check to confirm like jimmyae101 mentioned. could be a problem with the compressor itself...?

    cheers! :burnout:
     

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  6. Johnny_Tan

    Johnny_Tan From Facebook

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    How much does this cost? i oso facing same issue... :bawling:
     
  7. sweelt

    sweelt Well-Known Member

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    Borrow this thread.
    My problem is almost same but screeching sound when step on the throttle + same time AC compressor kick in.
    Let off throttle, or idling no sound while AC compressor ON/OFF.
    Any suggestion where to start. Bearing, clutch, belting ? i think not emergency case yet. :nurse:
     
  8. 6UE5t

    6UE5t Senior Member
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    I suggest check the belt first, usually already brittle or loose hence not gripping properly and sometimes sliding on the pulley, making that screeching noise.
     
  9. pac_jb

    pac_jb 5 Year | Silver

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    I had the same problem last time , it was the Aircond compressor bearing, I changed last time around rm80, the sound disappeared but after one month, the compressor Kong, end up changing the whole compressor, if your compressor is more Then 10 years , changing the compressor itself will be better.
     
  10. sweelt

    sweelt Well-Known Member

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    Ok, noted .
     
  11. vr2turbo

    vr2turbo 5 Year | Silver
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    Agree with bro. 6UE5t. check the belt first. Since the sound comes under load, means either the belt is loose or the belt harden and have no grip....:driver:
     
  12. parakey

    parakey Senior Member
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    +1, fairly easy to check to the aircond belt.
     

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