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Powersteering full lock squeal when stationary/slow movement - help!

Discussion in 'A4/A4 cabriolet/S4 forum(B6 chassis)' started by kujo, Feb 15, 2011.

  1. kujo
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    kujo New Member

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    Hi all,

    Well my car (A4 Avant 1.9tdi) has decided to start making an awful squeal when stationary or moving slowly on full lock!! I have searched the forum and found some useful information saying it could be the clutch on the alternator pulley.

    I have just been out to the car and was able to move the cooling fan just inside the alternator - it was said that it should only move one way which was correct (if it doesn't move it is definitely the pulley), however, I had to use a little force to make it move. Should it be free flowing one way or should there be some resistance?? Also at the time I did this the squeal had gone quiet so don't know if it is on it's way out but not completely gone yet.

    Any ideas? Could it be something else attached to the V-Belt?

    Secondly if it is the alternator pulley is this a job you can do on the driveway (I know it may require taking the front end apart) and has anyone done it to give me some guidance
    or
    if it is a garage what kind of cost am I looking at?

    Thanks

    Kev
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  2. bez101
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    bez101 Yorkshire & Humber Rep. Regional Rep

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    have you checked the ps fluid ?
    #2
  3. swarcup
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    swarcup Active Member

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    as above mine did this when the power steering fluid was low
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  4. kujo
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    kujo New Member

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    Yep pulled the cap off and there seems to be plenty of fluid in there! Didn't have a rag to check against the dip stick properly but looked like it had the correct amount.
    #4
  5. Woorlord
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    Woorlord shifting to Hyperspace... .

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    Run the car up to temperature with a drive and then check the ps fluid level - it is important you check at normal running temperature.
    If it needs topping up only use the Audi mineral ps oil as you risk the chance of blowing all your steering seals. £8~£9/L from Audi.
    #5
  6. kujo
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    kujo New Member

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    Ok thanks - I'll have a look when I get home tonight as it's an hours drive so should be plenty warm enough and I'll have a rag as well to check the dip stick.
    #6
  7. aragorn
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    aragorn "Stick a V8 in it!" Staff Member Moderator

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    Dont hold the steering on full lock, its not healthy for the pump or rack. Just move the wheel a tiny fraction back from full lock, puts much less pressure on everything.

    As for the squealing, might be worth checking the belt tensioner as well as the aforementioned alternator pulley.
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  8. kujo
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    kujo New Member

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    Update: Checked the powersteering fluid after driving home from work and all fine there so it's either the belt tensioner or alternator pulley. Has anyone had the work done at the garage for this issue and how much did it cost? Or can I do it on my drive way with basic mechanical knowledge.
    #8
  9. Martin69
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    Martin69 Member

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    this was happening in my a4 as well... got my local mechanic to sort if for €80... but I cant for the life of me remember what he did... think it was the belt tensioner at the front of the engine...

    I always thought you had to take the front off the car to get at it... but apparently with the right tool you can do it by just opening up the bonnet and getting your hand down there...
    #9
  10. way318
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    way318 Member

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    It will be both, if the alternator pulley fails then it will cause the belt tensioner to also fail. As the alternator pulley has a clutch in it and puts strain on the belt tensioner.

    This is what happened to mine last year in April and you have to replace both to stop it from happening again. Also if you only change the belt tensioner you won't get any warranty against it for it unless you change the alternator pulley at the same time.

    I got my parts from Murrays direct, oem quality & spec but alot cheaper them audi and not had any probs with mine since it was done. All parts come to around £140, but it will depend on what engine you have, mine is the AWX 1.9 TDI 130.

    Also worth getting the pas fluid replaced and change aux & alternator belts at the same time.
    #10
  11. magic123
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    magic123 Member

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    tensior or alternator pulley get it sorted asap mine did it for 4days then my alternator pulley snapped on my golf
    #11
  12. S4_dan
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    S4_dan Fire up the Quattro!

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    ^^^^ I'd of hoped he would of sorted it after nearly 3 years. Lol
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