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Short Screeching Noise on Start Up

Discussion in 'A3/S3 Forum (8L Chassis)' started by metricspaces, Sep 16, 2008.

  1. metricspaces

    metricspaces Member

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    My S3 is making a screeching noise on start up.

    The noise lasts about 1 second (2 at most).

    It doesn't happen every time I start up...haven't been able to identify anything particular about the times it does screech.

    I've had a search of the forum and all I can find is http://audi-sport.net/vb/showthread.php?t=33283&highlight=screech

    This suggests things like

    - climate control on
    - ribbed belt

    But none of these apply in my case

    - ive recently had the timing belt\water pump\ribbed belt replaced
    - i never have climate control on


    Anyone else experience this or have any ideas of what it might be?
     
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  3. abdus

    abdus Top Gear
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  4. 1animal1

    1animal1 The Clar!! it mouves!!!
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    my old A3 1.8T used to make a sqeeky grindy noise...that was the starter motor for 1-2 secs...apparently was going to 'go' weeks after it started doing it.... i let the car go two years later with another 25k on the clock with it still making the noise
     
  5. Wicked666

    Wicked666 Active Member

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    isn't it the air con compressor starting up?
     
  6. Caesium

    Caesium My BM is fixed!
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    Sounds like a slipping belt, the alternator can cause a high load on the belt just after start up and this causes it to slip, its a very common occurance.
     
  7. NHN

    NHN Retrofitter - Audi - VW - Skoda - Seat
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    is your car in econ mode or constant air con mode when started up??

    If its air con mode then its the compressor/clutch/belt on this, dont worry mine did it on/off for ages & never caused an issue

    try starting car in econ mode, then turn the econ button of & see if it starts to squeak immediately then for 1-2 seconds, let us know.
     
  8. bouncer--daz

    bouncer--daz A dog is for life....not just for friday nights!

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    starter motor bushes are going, my does it
     
  9. metricspaces

    metricspaces Member

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    Yep, that's what the garage said when I asked them whilst getting some other work done.

    Alot of the times when starting the car the screeching noise can be heard quite easily for about a second.

    But sometimes when I start up, no noise can be heard, then a few seconds later you can hear the same noise, but nowhere near as loud. Would this still be the started motor...even a few seconds (maybe 10?) after the engine has started?
     
  10. metricspaces

    metricspaces Member

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    What belt would be this be?

    I don't think it is the starter motor, because sometimes the engine starts up, and is running for a good few seconds before I actually pull off...could be up to 20 seconds. When I pull off I hear the noise.

    I got the ribbed belt replaced when I got my timing belt done...only last month.

    Could it be the ribbed belt?

    What is the solution for this problem?

    Is it serious if a belt is slipping...will it snap?
     
  11. Aldo

    Aldo Active Member

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    Going to resurrect a.

    My 3.2 A3 8P makes a screetch on all start ups

    Regardless if the Aircon is on or off, I usually have it on Econo mode.

    Any thoughts? It's a chain driven engine, so I thought maybe it could be the belt for the water pump as my BMW did this?

    Thanks in advance
     
  12. Aldo

    Aldo Active Member

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  13. darren t

    darren t Member

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    does the screech come from gearbox side or cambelt ?
     
  14. Aldo

    Aldo Active Member

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    It's chain on the 3.2 isn't it?

    Comes from the right side (off side) I think, will start up with bonnet open and check.

    Got Auto gearbox, would these have issues?
     

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