nasty squeek

Discussion in 'GM Powertrain' started by bjwelch76, May 5, 2010.

  1. bjwelch76

    bjwelch76 New Member

    I have a 2001 Silverado 1500 2wd 4.8 with a real nasty squeal coming from the from the front of the motor. It sounds like a belt slipping, but that is not the case. It gets louder with more RPMs. I have already performed the following:

    new serp belt
    new tensioner
    new idler pulley
    new a/c belt
    new a/c tensioner
    new water pump
    new fan clutch

    The noise still persists. I have isolated the noise to the water pump/crank pulley area. Could it be the oil pump?
  2. Silverado Junkie

    Silverado Junkie Rockstar 4 Years 500 Posts

    Well sometimes when your serpentine belt gets wet from things like oil or coolant or power steering fluid, it can cause it to sqeak. So maybe when you changed your water pump, you spilt some coolant or you have a little leak from a mess up it your installation somewhere in the process, or have an oil leak or powersteering fluid leak.
    Last edited: May 6, 2010
  3. bjwelch76

    bjwelch76 New Member

    Been through all of that already. There are no leaks anywhere. It was squealing prior to the water pump change, which is what prompted me changing the water pump in the first place.:neutral:

    If I don't get this squeal fixed soon, It's gonna drive me nuts! I know the neighborhood dogs will be happy when I do get it fixed. I'm sure that high pitched sound is hurting their ears.
  4. bigdaddy77084

    bigdaddy77084 Epic Member 5+ Years 500 Posts

    Can you get someone to turn the steering wheel while its running, you watch the power steering pump see if thats the prob...:neutral:
  5. bjwelch76

    bjwelch76 New Member

    I'll try that. D%#n sure can't hurt anything :lol:
  6. Greg84

    Greg84 Rockstar 100 Posts

    What about taking the belt off and running it for a couple seconds to see if you can hear the noise? You don't want to do it long because the water pump won't be turning, but at least it would tell you if its one of the belt driven accessories or something else like the oil pump you mentioned..
  7. bjwelch76

    bjwelch76 New Member

    That's on the list of things to do this evening. I'll keep you posted. LOL
  8. Loggerhead Mike

    Loggerhead Mike Rockstar 100 Posts

    did you clean your pully's w/ brake clean when replacing the belt and tensioners?

    a stethascope is 20-30 bucks and can make diaging noises alot quicker and easyer
  9. silveradotrailblazer

    silveradotrailblazer Epic Member 5+ Years ROTM Winner 5000 Posts

    A bad bearing in the alternater can make a squeeking noise.
  10. bjwelch76

    bjwelch76 New Member


    Found the problem!!

    It's the damn belt, every belt that we've put on it........After two days, the "shiny new" wears off the back of the new belt(s) and it starts squeeking again! :grrrrrr:

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