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High pitched squealing on cold startup

SiGainey Jan 6, 2011

  1. SiGainey

    SiGainey Member

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    Howdo, anyone ever had a very high pitched squealing when they start their S3? It's like a slipping drive belt but it only lasts a second and then goes for the day, and it's also higher pitched. Car is garaged overnight so it's not as likely to be condensation on a pulley...
     
  2. Welly

    Welly VX220 SC Driver :)

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    Check the serpentine aux belt for wear, and check the timing belt for wear mark would be my first place to start.

    Also may be worth spraying WD40 onto the aux belt and the aux belt tensioner pulley before first start to see if it alters the noise at all.
     
  3. beachbuggy

    beachbuggy Well-Known Member

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    As Welly says.

    Spray WD40 on the aux belt and pulley, should temporarily fix the problem, if it does then it's a new belt and possibly pulley.
     
  4. S3BAM

    S3BAM Member

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    Could also be starter motor sticking slightly most vag 1.8t's suffer at sometime
     
    Last edited: Jan 6, 2011
  5. SiGainey

    SiGainey Member

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    Timing belt was done not 6 months ago but i'll check it anyhow :) Could be the tensioner - the belt looks pretty new but they are only about a tenner so I'll chuck a new one on I think :)

    The alternator looks to have been replaced recently, so I doubt it's going to be that but it could be the air con compressor...
     
    Last edited: Jan 6, 2011
  6. Alex C

    Alex C Well-Known Member VCDS Map User Audi S3

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    I started getting a squeel on start up on my S3 too. I think it is one of the belts this time, mine only happens if the aircon is on. I used to have a dodgy starter motor on my old A3 1.8T which also made a squeel bit it wasnt so high pitched, more of a torquey squeel if you get me, as the engine was doing work against the eletric starter motor, there was also the mechanical sound of slipping too.
     
  7. Welly

    Welly VX220 SC Driver :)

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    Yeah, starter motor sticking is a squealy sound, but also mechanical. Normally happens every start though as it is caused by the solenoid sticking on, as opposed to just first start. Damn crappy VAG starters...
     
  8. ptr

    ptr Member

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    I've had this with the starter before, extremely loud noise, to the point it would make people jump if they were anywhere near my car when I started it :laugh:

    Try WD40 as suggested above but otherwise is probably the starter sticking.
     
  9. Y83OLK

    Y83OLK Hulk Smash!

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    Does it do it if you have your aircon switched off?
     
  10. SiGainey

    SiGainey Member

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    I will check with the aircon off too - it starts about a second after the engine fires so it could be the starter motor disengaging...
     
  11. Jay-a3

    Jay-a3 Member

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    I get it sometimes when I start the engine with the aircon on!!
     
  12. Y83OLK

    Y83OLK Hulk Smash!

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    Sounds like your a/c fan is seizing.
    Mine has done this too.
    Replaced both of mine and the noise is cured.

    (i have a good - small fan here if anyone requires it)
     
  13. SiGainey

    SiGainey Member

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    Yeah, its air con related :( started the car with the air con off, no noise. Drive for a minute, switch on the air con and the noise is there.
    Thanks for the advice all :)
     
  14. marcuss3

    marcuss3 Member

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    Could be a pulley wheel. I had this on my BMW 520D a few months ago.
     
  15. DenCar

    DenCar Member

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    My wifes A3 1.8 T has also started squeeling upon start-up just for a second, it does sound Starter Motor related to me.

    DC
     
  16. Alex C

    Alex C Well-Known Member VCDS Map User Audi S3

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    Sounds aircon related to me
     
  17. BL33SU

    BL33SU New Member

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    its the starter motor.
    comon problem on our engines.

    check vortex =)
     

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