1. This site uses cookies. By continuing to use this site, you are agreeing to our use of cookies. Learn More.

Noise from auxiliary belt area 1.9tdi AVF

Discussion in 'A4/A4 cabriolet/S4 forum(B6 chassis)' started by S3 GAZ, Dec 29, 2013.

  1. S3 GAZ
    Offline

    S3 GAZ Member

    Joined:
    Dec 17, 2006
    Messages:
    361
    Likes Received:
    8
    [Dec 29, 2013]
    Looking for a bit of advice.

    I have started to have a humming/drone noise coming from the auxiliary belt area of my 1.9 tdi 130 AVF. Car feels sluggish at the moment too.

    It can be heard on tick over with a ticking noise i think coming from the alternator.
    The belt looks like it's jumping about a bit on the tensioner.

    Also on full lock I'm getting a screech.

    I imaging it may be one of the pulleys.
    Any ideas how to find the culprit.
    #1
  2. Ads

    Ads

    [Sep 22, 2014]

  3. S4_dan
    Offline

    S4_dan Fire up the Quattro!

    Joined:
    Jan 5, 2006
    Messages:
    1,732
    Likes Received:
    77
    [Dec 29, 2013]
    Sounds like tensioner failing if belt is jumping around or a pulley is off-centre somewhere/siezing

    I'm changing my sisters PAS pump tomorrow as her pump is seizing on her 03 Passat 1.9tdi sport. It caused the belt to jump around/screech and stressed the tensioner so a garage replaced the belt and pulley but it's still the same. Culprit is the PAS pump after I had a look.

    Remove the belt and turn the alternator/pas and any other pulley you have and check for play/stiffness and check the tensioner pulley for play.
    #2
  4. IanFM
    Online

    IanFM Active Member

    Joined:
    Feb 12, 2012
    Messages:
    263
    Likes Received:
    39
    [Dec 29, 2013]
    I'd bet my bottom dollar its the alternator clutch pulley. I'm on my phone just now so can't really link but if you search for it on the forum you will find it is a common fault.
    #3
  5. S3 GAZ
    Offline

    S3 GAZ Member

    Joined:
    Dec 17, 2006
    Messages:
    361
    Likes Received:
    8
    [Dec 29, 2013]
    Cheer guys. Il take the belt off and have a feel at the pulleys.

    Should they all turn freely?
    #4
  6. deano1978
    Offline

    deano1978 different gear

    Joined:
    Jan 18, 2013
    Messages:
    688
    Likes Received:
    67
    [Dec 29, 2013]
    As above ACP
    Alternator clutch pulley.
    #5
  7. desertstorm
    Offline

    desertstorm Well-Known Member

    Joined:
    Nov 21, 2013
    Messages:
    1,048
    Likes Received:
    292
    [Dec 29, 2013]
    If the pulley has gone on the alternator check the belt tensioner as well as it takes a good hammering when the pulley sicks and may fail in short order.
    #6
  8. Jimmy TDI
    Offline

    Jimmy TDI Pro Tinkerer

    Joined:
    Dec 21, 2013
    Messages:
    512
    Likes Received:
    74
    [Dec 29, 2013]
    As said do both at the same time. When the acp went on my bora I only replaced that, then the tensioner failed completely a week later.
    #7
  9. S3 GAZ
    Offline

    S3 GAZ Member

    Joined:
    Dec 17, 2006
    Messages:
    361
    Likes Received:
    8
    [Dec 29, 2013]
    Not had a chance to look yet but thanks for the info. Will look tomorrow and post back results.

    Where can I get replacement pulleys from at bon dealer prices
    #8
  10. Jimmy TDI
    Offline

    Jimmy TDI Pro Tinkerer

    Joined:
    Dec 21, 2013
    Messages:
    512
    Likes Received:
    74
    [Dec 29, 2013]
    Motor factors, eBay, ECP places like that.
    #9
  11. S3 GAZ
    Offline

    S3 GAZ Member

    Joined:
    Dec 17, 2006
    Messages:
    361
    Likes Received:
    8
    [Dec 29, 2013]
    Cool from what I've read il need a special tool to change the alternator clutch pulley. Hopefully my mate has one or can source it.

    Thanks again guys. Will let yous know how I get on
    #10
  12. S3 GAZ
    Offline

    S3 GAZ Member

    Joined:
    Dec 17, 2006
    Messages:
    361
    Likes Received:
    8
    [Dec 30, 2013]
    #11
  13. Mollygoogle
    Offline

    Mollygoogle Member

    Joined:
    Aug 21, 2012
    Messages:
    172
    Likes Received:
    1
    [Dec 31, 2013]
    is exactly what mine did when the ACP went
    #12
  14. S3 GAZ
    Offline

    S3 GAZ Member

    Joined:
    Dec 17, 2006
    Messages:
    361
    Likes Received:
    8
    [Jan 18, 2014]
    Sorry for late update. Finally got round to fitting replacement clutch pulley, tensioner and belt. Has cured all noise from both alternator and the screech on full lock. Belt is no longer jumping around and is very smooth.

    The old tensioner was shot and there was a fair bit of play in the clutch pulley. All in cost me £75
    Car is nice and quiet again. Thanks for everyone's input and help
    #13
  15. S4_dan
    Offline

    S4_dan Fire up the Quattro!

    Joined:
    Jan 5, 2006
    Messages:
    1,732
    Likes Received:
    77
    [Jan 19, 2014]
    Glad it was sorted. I changed the Power steering pump on my sisters car, improved the steering 10 fold! But didn't cure the jumping and screeching. It was the clutch pulley too. £45 later and it's all sorted now. Well, that issue is! lol

    Dan
    #14
  16. S3 GAZ
    Offline

    S3 GAZ Member

    Joined:
    Dec 17, 2006
    Messages:
    361
    Likes Received:
    8
    [Jan 19, 2014]
    Dan What kind of symptoms did she have with the steering
    #15
  17. S4_dan
    Offline

    S4_dan Fire up the Quattro!

    Joined:
    Jan 5, 2006
    Messages:
    1,732
    Likes Received:
    77
    [Jan 19, 2014]
    She didn't really notice any at the time as it had been a bit heavy since she bought the car and assumed that's how it was.

    It was only once I had replaced the pump, due the belt jumping because of the clutch pulley, it was making the pump stall/screech.

    With the 2nd hand pump on she said steering was much better/lighter. So the original pump may have been slowly failing over time anyway.
    #16
  18. benjie
    Offline

    benjie Active Member

    Joined:
    Oct 10, 2009
    Messages:
    784
    Likes Received:
    105
    [Jan 19, 2014]
    Dan, Gaz, did you go OEM with your parts or get them from elsewhere? I'm going to need to change mine soon.
    #17
  19. S3 GAZ
    Offline

    S3 GAZ Member

    Joined:
    Dec 17, 2006
    Messages:
    361
    Likes Received:
    8
    [Jan 19, 2014]
    Gsf at trade price and mind youl need the 21 spline tool to remove the clutch pulley and a in my experience a buzz gun as it needs to be shocked off.
    #18
  20. S4_dan
    Offline

    S4_dan Fire up the Quattro!

    Joined:
    Jan 5, 2006
    Messages:
    1,732
    Likes Received:
    77
    [Jan 19, 2014]
    Eurocarparts for my sister's pulley and a friend fitted it for £10.
    #19
  21. benjie
    Offline

    benjie Active Member

    Joined:
    Oct 10, 2009
    Messages:
    784
    Likes Received:
    105
    [Jan 19, 2014]
    OK, thanks for that guys.
    #20

Share This Page