squak from ac belt | FerrariChat

squak from ac belt

Discussion in '456/550/575' started by stevepaa, Oct 13, 2020.

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  1. stevepaa

    stevepaa Formula Junior
    Owner Silver Subscribed

    Apr 5, 2006
    706
    san jose, ca
    Full Name:
    steve
    #1 stevepaa, Oct 13, 2020
    Sometimes when I start the car, I will get a squak belt noise I suspect when AC kicks in. What should I look at?
     
  2. tazandjan

    tazandjan Three Time F1 World Champ
    Lifetime Rossa Owner

    Jul 19, 2008
    38,038
    Clarksville, Tennessee
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    Terry H Phillips
    #2 tazandjan, Oct 13, 2020
    Steve- I do not remember whether yours is a 550 or 575M. On the 575M, AC is on all the time unless the outside temperature is below 59F at cold start. So your noise could be a belt or it could be a bearing. A piece of rubber hose held to your ear may help you isolate the sound to one location.
     
  3. stevepaa

    stevepaa Formula Junior
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    Apr 5, 2006
    706
    san jose, ca
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    steve
    #3 stevepaa, Oct 14, 2020
    i think I will try to isolate by turning ac off on console, then turn it on and see if I get the noise.
     
  4. stevepaa

    stevepaa Formula Junior
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    Apr 5, 2006
    706
    san jose, ca
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    steve
    #4 stevepaa, Oct 14, 2020
    Terry
    575 and the noise occurs when I turn on the ac
    I will adjust tension and see what happens
     
  5. ferraridriver

    ferraridriver F1 Rookie

    Aug 8, 2002
    4,134
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    Dave
    #5 ferraridriver, Oct 14, 2020
  6. AVIMAX

    AVIMAX Formula Junior

    Aug 5, 2014
    686
    Toronto
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    Ryan
    #6 AVIMAX, Oct 14, 2020
    The belt doesn't stop when the AC is off, so a noise that happens when the AC turns on is probably something else. Does it only happen when you start the car, or do you hear it if you press the STOP button on the climate control, wait for the compressor to disengage, then press it again to engage the compressor? You first said it happens sometimes when you start the car, but then you say when you turn on the AC. I ask because a clutch throwout bearing that is starting to go can make a screech for a second on startup which sounds similar to belt squeal, at least that's what mine did. It only happened once in a while at first, but soon became more frequent as the bearing got worse.
     
  7. stevepaa

    stevepaa Formula Junior
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    Apr 5, 2006
    706
    san jose, ca
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    steve
    #7 stevepaa, Oct 15, 2020
    infrequently when I start the car, so that is when I turned it off (575), started the car then turned on ac, and got the squawk
    belt frequency is 119 hz, should be 160-170
    manual says I can set to correct frequency twice
    this will be my second time, last was 3 years ago when I did all the belts
    comments?
     
  8. stevepaa

    stevepaa Formula Junior
    Owner Silver Subscribed

    Apr 5, 2006
    706
    san jose, ca
    Full Name:
    steve
    #8 stevepaa, Oct 27, 2020
    the belt was at 110 hz when I got around to it. I reset to 160 hz and no belt noise now.
     
  9. tazandjan

    tazandjan Three Time F1 World Champ
    Lifetime Rossa Owner

    Jul 19, 2008
    38,038
    Clarksville, Tennessee
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    Terry H Phillips
    #9 tazandjan, Oct 27, 2020
    Belt change interval is 3 years for the aux belts.
     
  10. stevepaa

    stevepaa Formula Junior
    Owner Silver Subscribed

    Apr 5, 2006
    706
    san jose, ca
    Full Name:
    steve
    #10 stevepaa, Oct 28, 2020
    okay, I guess it is time for new belts
    thanks, Terry
     

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