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Belt Squeal Sound

Discussion in '348/355' started by Swancoat, Sep 15, 2012.

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  1. Swancoat

    Swancoat Karting

    Jul 26, 2007
    145
    Houston
    #1 Swancoat, Sep 15, 2012
    I hear a weird sound when I first start up my 355 and start to back out of the garage. As I give it throttle, there is a sound coming from the engine bay that sounds very much like a squealing belt. This happens the first couple of times that I apply throttle and that's it. Even if I restart the car, the sound doesn't reappear. Only when the car is cold.

    Any thoughts on this? Should I be concerned?
     
  2. ernie

    ernie Two Time F1 World Champ
    Lifetime Rossa Owner

    Nov 19, 2001
    22,614
    The Brickyard
    Full Name:
    The Bad Guy
    #2 ernie, Sep 15, 2012
    Check:

    alternator tensioner
    a/c belt tention

    Either one of those could be loose causing the squeal. It could also be the bearing for the alternator tensioner going bad. So have a looksie at those and then get back to us.
     
  3. 2000YELLOW360

    2000YELLOW360 F1 World Champ

    Jun 5, 2001
    19,800
    Full Name:
    Art
    #3 2000YELLOW360, Sep 15, 2012
    You bet, if it's the tensioner, it's a warning at you're about to have a belt failuure. Get it looked at immediately.

    Art
     
  4. tcannon

    tcannon Formula 3

    Feb 18, 2009
    1,763
    Norman, OK
    Full Name:
    Todd Cannon
    #4 tcannon, Sep 16, 2012
    I say it is a loose alt-a/c belt as well. It is easy to tighten it to check it. If it was a timing belt tensioner, it would not go away after a short bit of time only after starting. It would keep making the noise at all times.
     
  5. bikz

    bikz Formula 3

    Mar 2, 2012
    1,043
    Malaysia
    #5 bikz, Sep 16, 2012
    i concur... its most prob the alt/ac belt. i had the same issue. the alternator bracket was broken and the belt went completely loose.....had a similar noise only on cold starts..
     
  6. Swancoat

    Swancoat Karting

    Jul 26, 2007
    145
    Houston
    #6 Swancoat, Sep 16, 2012
    Tell me this is repairable without engine removal...


    Sent from my iPad using Tapatalk HD
     
  7. tcannon

    tcannon Formula 3

    Feb 18, 2009
    1,763
    Norman, OK
    Full Name:
    Todd Cannon
    #7 tcannon, Sep 16, 2012
    Oh yes.
     
  8. ernie

    ernie Two Time F1 World Champ
    Lifetime Rossa Owner

    Nov 19, 2001
    22,614
    The Brickyard
    Full Name:
    The Bad Guy
    #8 ernie, Sep 17, 2012
    ^What he said.^

    You will need to be able to get under the engine though.
     
  9. Swancoat

    Swancoat Karting

    Jul 26, 2007
    145
    Houston
    #9 Swancoat, Sep 17, 2012
    Good to hear. I don't have a lift though, so this will have to go off to the mechanic... but at least it sounds like hundreds not thousands! (which is a question that comes up a ridiculous amount of times on 355s!)
     
  10. tcannon

    tcannon Formula 3

    Feb 18, 2009
    1,763
    Norman, OK
    Full Name:
    Todd Cannon
    #10 tcannon, Sep 17, 2012
    All you need is a floor jack and a couple of jack stands. You just have to get the rear end up high enough to crawl under the area of the front of the engine. It is not hard to do.
     
  11. Swancoat

    Swancoat Karting

    Jul 26, 2007
    145
    Houston
    #11 Swancoat, Sep 17, 2012
    On a somewhat related note (as I'm realizing I have no idea what the accessory belt layout on this car is...) Is there a 355 shop manual availalbe anywhere. Something tells me, no...
     
  12. tcannon

    tcannon Formula 3

    Feb 18, 2009
    1,763
    Norman, OK
    Full Name:
    Todd Cannon
    #12 tcannon, Sep 17, 2012
  13. m5guy

    m5guy Formula 3

    Aug 17, 2008
    1,627
    Ventura, CA.
    Full Name:
    Greg
    #13 m5guy, Sep 17, 2012
    Last edited by a moderator: Sep 7, 2017

    Here you go. In this picture, I had to draw in with red the long belt that runs clockwise from the crank pulley, to the idler pulley, to the alternator, then up to the water pump pulley.

    At the top of the motor is the short belt that goes from the back side of the water pump pulley to the PS pump.

    At the lower right corner of this picture is the short belt that goes from the crank pulley to the AC compressor.
    Image Unavailable, Please Login
     
    Zamboniman308 likes this.

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