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A rat in my engine bay?

Discussion in 'A3/S3 Forum (8L Chassis)' started by MrTackalakalaka, Apr 29, 2012.

  1. MrTackalakalaka
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    MrTackalakalaka Member

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    [Apr 29, 2012]
    Noooooo not a real rat......

    Started my car up today and pressed the AUTO button on the heater/fan

    Then it sounded like a small animal was being tortured in my engine bay. I then turned it off thinking what the bajeebus was that?
    Turned it on again and it made the squealing noise again. I then pressed the Aircon (snow flake) button and it stopped. I then started driving for a while and pressed the AC button again and it let out a shorter squeal. I tried it later on and it didn't do it again.

    Anyone know why it might be making that noise? better still......what?

    My AC (as far as i know) hasn't worked since I've had the car. I have never got round to re-gassing it

    cheers
    #1
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  3. ant schof
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    ant schof Member

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    [Apr 29, 2012]
    Hi mate ,
    Had a very similar screeching / scraping noise from my S3 about twelve months ago , turned out to be the alternator
    clutch pulley breaking up , seemed to do it more when the air con was on . Also had the battery warning light flickering on occasionaly when this happened ! Worth looking at maybe . You could try slipping the multi v belt off and see if the noise goes away .

    Cheers Ant
    #2
  4. <tuffty/>
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    <tuffty/> Badger 5 Edition Staff Member Moderator

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    [Apr 29, 2012]
    Be one of the fans... mine does ther same occasionaly... its fine when the enginebay is warm but on cold start it can squeel a bit...

    <tuffty/>
    #3
  5. MrTackalakalaka
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    MrTackalakalaka Member

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    [Apr 29, 2012]
    Thanks guys!!

    I shall look into it! Will have a look in the engine bay and get the girlfriend to put the AC on. Sods law it won't happen until I'm next in the car haha

    Thanks again
    #4
  6. Dani_B19
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    Dani_B19 Audi-sports own special child.

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    [Apr 29, 2012]
    Mine does the same on start up up if i put aircon on.
    #5
  7. vfr800
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    vfr800 Active Member

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    [Apr 30, 2012]
    My old A3 made some nasty noises like that once, turned out it was the aircon clutch/pulley/compressor thingy whatsits failing and trying to escape from the engine bay.

    Liam
    #6
  8. fingermouse
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    fingermouse thats me

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    [Apr 30, 2012]
    funny Ive just had a simular noise this morning, I was blaming the fact that ive lost my garage to the wifes new car so mine is now out on the drive getting wet :(
    #7
  9. Alex C
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    Alex C Well-Known Member

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    [Apr 30, 2012]
    had it on mine this morning too
    #8
  10. LoopTrooper
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    LoopTrooper Member

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    [Apr 30, 2012]
    There is always the traditional turn the stereo up option?
    #9
  11. Prawn
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    Prawn My other car is a MINI!!!!

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    [Apr 30, 2012]
    I was always lead to believe that this was a tiny bit of belt slip caused by condensation on the belt on a cold morning..... Both mine have done it when starting up with the aircon switched on.
    #10
  12. fingermouse
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    fingermouse thats me

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    [Apr 30, 2012]
    mine sounded more like the fan in the car as if the bearings are getting a little dry
    #11

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