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Water pump going out?

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by BrianK5, Dec 31, 2001.

  1. BrianK5

    BrianK5 Registered Member

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    Location:
    Omaha, Nebraska
    What does it sound like when a water pump is starting to go? There's a chattering sound coming from the water pump area, would that be it? The chattering increases when I accelerate and is noticable while idling. Also, is the fan supposed to be able to spin with the engine off? If it doesn't, does that mean the fan clutch is bad?

    Thanks,
    Brian

    1985 K5 Blazer
     
  2. 95 Silverado

    95 Silverado 1/2 ton status

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    If your clutch type fan won't spin, there is something wrong with it. if it locked up, it could have knocked out the water pump bearings. take off the water pump belt and run the engine for a short time, if the noise goes away you know it's something driven by that belt. check the alternator also, it should spin freely, smoothly. lift up and down on the fan , if you feel any movement the water pump bearings are going bad. if that fan is locked up, you can replace just the hub, just bolt your fan to the new hub.

    '95 Chevy Silverado 1500
    5.7 V8-NV4500- 3.73 rears
    See My Toys: <a target="_blank" href=http://community.webshots.com/user/wdb172454>http://community.webshots.com/user/wdb172454</a>
     
  3. Rayven90

    Rayven90 Registered Member

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    I beleive 95 Silverado is right on track....

    Rayven
     
  4. chevyracing

    chevyracing 1/2 ton status

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    make sure the chattering noise is not the alternator. if something hit one of the fins on it you may here that sound as well. If you have a clutch type fan you should be able to turn it with the engine off, it will however have some resistance.

    John

    Like to go sloppin' 'round in da mud in a rapid fashion....=)

    <a target="_blank" href=http://coloradok5.com/gallery/albun31?&page=1>BLAZER PICS</a>
     

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