Question about 2004 Chevrolet TrailBlazer

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When trailblazer is on, i hear a loud squeeking sound. when checking engine i noticed that the radiator cooling fan and pulley move up and down. does not seem to be wobbling at all just moving up and down. can this be a pulley problem, or sign of a more serious problem

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Sounds like your fan clutch is going bad. If you can move the fan by hand then I recommend changing the fan clutch. If it completely fails your fan will be shot through your radiator.

Posted on Apr 22, 2010

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Posted on Jan 02, 2017

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Water pump leak need diagram


Instructions
  1. 4.0L Explorer Engines
    • 1Place a drain pan underneath the radiator. When the engine is cool, drain the cooling system from the radiator into the pan.
    • 2Remove the fan shroud, the cooling fan, the accessory drive belt and the water pump pulley with the bolts.
    • 3Disconnect the coolant bypass hose and the lower radiator hose.
    • 4Loosen and remove the bolts attaching the water pump and remove the pump from the engine.
    • 5Clean all the mounting surfaces to the water pump.
    • 6Install the new pump, tightening the bolts to 89 inch pounds (20 to 28 Nm).
    • 7Reattach and install all components in reverse order from removal. Tighten the water pump pulley bolts to 18 foot pounds (25 Nm).
    • 8Refill the cooling system. Start the car and check for leaks when the engine reaches normal operating temperature.
    5.0L Explorer Engines
    • 9Disconnect the negative battery cable and place a drain pan underneath the radiator. When the engine is cool, drain the cooling system from the radiator into the pan.
    • 10Remove the fan shroud, the cooling fan, the accessory drive belt and the water pump pulley with the bolts.
    • 11Take out the accessory drive belt. Disconnect and remove the heater hose and the bypass hose from the pump.
    • 12Remove the brackets to the engine control sensor wiring. Move the harness out of the way.
    • 13Loosen and remove the bolts to the water pump pulley and the water pump and remove the pulley.
    • 14Pull the water pump out and away from the front cover. Once the water pump is out of the way, disconnect the lower radiator hose. Then, take the water pump out of the engine.
    • 15Clean the front cover to the water pump and all the mounting surfaces. Put some adhesive gasket sealer on both sides of a brand new gasket and put it on the pump.
    • 16Reattach the lower radiator hose to the pump and reattach the pump, tightening the bolts to 15 to 21 foot pounds (20 to 28 Nm).
    • 17Reattach and reinstall all components in reverse order to their removal.
      Reattach the negative battery cable and refill the cooling system. Start the car and check for leaks when the engine reaches normal operating temperature.

Sep 13, 2012 | 1998 Ford Explorer

1 Answer

My 2004 Trailblazer overheated,ilooked under the hood to see the fan was wet. water in the radiator is still circulating.Is this a hole in the radiator or is it the water pump?


Check for the leak when running but not moving. Is the fan electric, and mounted on the radiator? If it is, I would suspect a radiator leak. You might pull the fan assembly off to get a closer look at the radiator.

Jul 16, 2012 | 2004 Chevrolet TrailBlazer

1 Answer

I shut off the engine but some thing is still running, you can hear it what is it?


It WITHOUT DOUBT will be your radiator fan cooling down your engine so don't worry yourself :)

Oct 25, 2010 | 2004 Chevrolet TrailBlazer

2 Answers

How to locate and replace water pump on 2006 chevy trailblazer


The water pump is usually mounted center, Front of the engine and is run by a belt. Look for the location the water lines connect to that has a pulley attached.

Jul 11, 2010 | 2006 Chevrolet Trailblazer Ext

3 Answers

2004 jeep grand cherokee overheating and loud noise


sounds like one of two problems your fan is not working properly or you radiator is particularly restricted

May 20, 2010 | 2004 Jeep Grand Cherokee

1 Answer

Engine makes loud roar


It sounds like a fan clutch has failed.

A fan clutch is a thermostatic device that exists as an integral component of certain automotive cooling systems. When the engine is cool or even at normal operating temperature, the fan clutch partially disengages the engine's mechanically-driven radiator cooling fan, generally located at the front of the water pump and driven by a belt and pulley connected to the engine's crankshaft. This saves power, since the engine does not have to fully drive the fan

Nov 22, 2009 | 2002 GMC Envoy

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