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wooshing noise

Discussion in 'Z3 M Roadster & Coupé' started by bruce&kim, Sep 1, 2013.

  1. bruce&kim

    bruce&kim Zorg Legend
    The West Country

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    Had a strange one today...been out for the day around sunny devon,ended up on small narrow country roads for over an hour and not being able to get over 40mph max due to conditions. During that time the engine developed a wooshing noise which increased with revs
    On reaching a duel carriage way i booted it ,got up to 4k revs and it stutered then cleared. Got a long run due soon (Santa Pod) so would like to get it sorted,but quite difficult to explain to garage wondered if it could be the fan clutch sticking so i tried turning the fan and it turns well but it becomes stiffer in the same position on each rotation.
    Many thanks Bruce
     
    #1 bruce&kim, Sep 1, 2013
    Last edited: Sep 1, 2013
  2. Brian H

    Brian H Zorg Guru (V)
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    It could have just been the viscous fan doing its job, If the engine got a little hot the viscous fan would kick in. I have not heard it on mine but it is supposed to be quite a noise. Let the engine cool and see if the fans is still stiff to turn?
     
  3. bruce&kim

    bruce&kim Zorg Legend
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    To be honest Brian it sounded like a super charger...but alas i have no such mod...engine now cold and fan still sticks in same place on one revolution.Have ordered a new fan clutch will fit it next week and see.At the worst its another part i dont have to worry about .If it works i will be a happy bunny and at least this thread can help someone else in the future....fingers crossed
     
  4. Aceman

    Aceman Moderator
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    Definitely sounds like the fan as when it kicks in it sounds like you have a jet engine under the hood :)
    It might also be worth changing the actual fan blades too as the plastic gets brittle and if the viscous clutch cuts in when you are doing high revs it can shatter the blades sending fragments all over the place making a right mess and an even more expensive repair bill.
     
  5. bruce&kim

    bruce&kim Zorg Legend
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    Many thanks as always chaps your help has been much apreciated...to add a footnote there is also alot of sideways play so no doubt the bearing has gone
     
  6. GazHyde

    GazHyde The Gaz Monkey
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    I had that happen on a test drive a few months ago. Made a hell of a mess, hundreds of bits and knackered the radiator while it was at it! Needless to say I didn't buy that car ;)
     
  7. bruce&kim

    bruce&kim Zorg Legend
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    Damn had the fan clutch replaced......and guess what the noise is still there...only for about 15 mins..best way to describe it is its like the fan being on the highest number but the noise raises with the revs.It does however stop ,but it cant be right Does anyone have any ideas?
     
  8. Brian H

    Brian H Zorg Guru (V)
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    Maybe run it for a few days, as long as the viscous fan is not "locked" is should be OK. Does it feel free to spin?
     
  9. bruce&kim

    bruce&kim Zorg Legend
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    Hi Brian its been replaced now and yes it does spin freely mate.Strange thing after 15 mins the noise stops and no loss of performance at any time...will go back to garage in the morning,but you know what they are like" replace everything until it stops"just hoped someone had a similar prob
     
  10. Brian H

    Brian H Zorg Guru (V)
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    Does it do it every time you start the car?
     
  11. bruce&kim

    bruce&kim Zorg Legend
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    Never used too!! it started on Sunday during a slow drive,in the country today got the fan clutch replaced and after.left the garage and whooshing noise started then ,picked up wife from work after 10 mins and it had stopped .
     
  12. bruce&kim

    bruce&kim Zorg Legend
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    Just an update as it may be of some use to others . My garage has informed me on start up the the whooshing noise is normal its the fan working until the fan clutch heats up. My fan clutch bearing was so knackered it was not working properly at all. Done a few hundred miles this weekend and all seems well. So if you hear no whooshing noise on a 2.8 on startup maybe worth checking the bearing.
     

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