Question about 2003 Chevrolet TrailBlazer

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Fan is loose and can wiggle the whole part with the drive belt on it where it is against the engine block

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  • wda0220 May 10, 2010

    would a bad belt cause that assembly to be loose,because the bely does need a change but ut started making noise yesterday and thats wheni noticed it loose and noticed belt had a lot of cracks ,i hope it can be that simple..

  • wda0220 May 10, 2010

    just would like other opinion i hope your solution is correct and its that easy

  • wda0220 May 10, 2010

    thank you iwas reading haynes and i yhink that is the problem thanks again

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  • Chevrolet Master
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Hello
when u move the fan blade does the pulley that drives the fan belt move or just the fan blade? if the pulley moves the water pump front bearing is worn out, if just the fan moves then u will need to replace the fan clutch it has a worn out bearing, most of the time it is the water pump bearing that is worn out, the water pump is directly behind the fan pulley and is held into the engine block cooling passage by 4 bolts, it is a flange type pump that is flush with the block, below u will see a picture of the water pump and a part number.

GATES Part # 41122 {Water Pump (Standard); $31.89


fan is loose and can wiggle the whole part with - 8429490.jpg

Posted on May 10, 2010

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  • Chevrolet Master
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Put a wrench on the tensioner pulley. Turn in the direction that will introduce slack to the belt. This task also work for remove and replace.

For more info visit our enthusiasts forum at www.trailvoy.com

  1. The diagram is printed on a sticker adhered either to the fan shroud or underside of the hood. This diagram illustrates how the belt routes around the various pulleys. If the sticker is missing, you can get one at your local auto parts store, Chevrolet dealer or online.
  2. Pull the serpentine belt tensioner pulley aside with the belt tensioner tool. The end of the belt tensioner tool plugs into the side of the tensioner body to allow you to move the tensioner. Push the belt off the tensioner pulley with your free hand once the belt slackens. You can move the tensioner with a pry bar or large socket wrench, but using the wrong tool can quickly lead to a broken tensioner. Save yourself the aggravation of broken parts by simply using the right tool, which you can purchase at most auto parts stores or professional tool retailers for far less than the price of a new tensioner. Take the tensioner tool out once the belt is off the pulley by carefully releasing your hold on it and pulling it out of the tensioner body. Make sure to set the tool within easy reach.
  3. Pull the belt of all the pulleys and then take it out of the engine bay. Slip one end of the old belt and the new belt around your foot and pull the other end of both belts upward to compare lengths. The new belt should be roughly 1/2-inch shorter than the old belt. This variation in length is due to stretching during the belt's lifespan.

Hope helped.

Posted on May 10, 2010

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Check the help link mentioned below:----

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http://howtobyme.blogspot.com/2011/12/engine-makes-noise-and-cooling-fan-belt.html
---------

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1 Answer

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  • Removal of the Fan Shroud and Drive Belts
    • 1 Drain the cooling system. Place a waste oil collection pan underneath the petcock valve on the lower corner of the radiator. Open the petcock valve to drain the system.
    • 2 Remove the bolts that connect the fan shroud to the radiator core and remove the fan shroud.
    • 3 Loosen the alternator adjustment bolt and slide the alternator toward the engine. Remove the drive belt.
    • 4 Loosen the adjustment bolt for the air conditioning compressor, and slide the compressor toward the engine. Remove the drive belt.
    • 5 Loosen the adjustment bolt on the power steering pump and slide the pump toward the engine. Remove the drive belt.
  • Removal of the Water Pump
    • 1 Disconnect the bypass hose from the water pump by loosening the hose clamp and pulling the hose off the fitting.
    • 2 Remove the bolts that connect the water pump to the engine block, and remove the water pump and engine fan as an assembly.
    • 3 Remove the four retaining nuts that connect the fan assembly to the water pump. They will be located between the fluid coupling and the water pump pulley.
  • Installation of the Water Pump
    • 1 Attach the fan assembly to the new water pump by sliding the pulley then the fluid coupling onto the water pump and reinstalling the retaining nuts.
    • 2 Clean any old gasket material off the water pump mounting surface on the engine block.
    • 3 Place the new water pump gasket on the water pump mounting surface.
    • 4 Slide the new water pump into position and reinstall the mounting bolts.
    • 5 Reconnect the bypass hose by sliding the hose over the fitting and tightening the hose clamp.
  • Reinstalling the Drive Belts and Fan Shroud
    • 1 Reinstall the the drive belts for the power steering pump, air conditioning compressor and alternator. Tighten the adjusting bolts.
    • 2 Measure the deflection of each belt to make sure the belts are properly tightened. Measure deflection by placing a straight edge along the belt against the accessory pulley and the water pump pulley. Push down on the belt and measure the distance between the belt at the midpoint and the straight edge. It should be between 1/2 and 1/4 inch. Any more and the belt needs to be tightened. Loosen the adjustment and slide the accessory away from the engine to tighten.
    • 3 Drop the fan shroud into position and reinstall the bolts that secure it to the radiator.
    • 4 Close the petcock valve on the radiator and fill the cooling system with fresh coolant.
    • 5 Run the engine and visually inspect for leaks.



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    4)Break loose the bolts holding the pulley on: 4- 13 mm or 1/2" bolts. Just break them loose, don't remove them.

    5) Remove the serpentine belt.

    6) Remove the pulley: Finish removing the bolts holding the pulley and remove the pulley.

    7) Disconnect the hoses.

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    A gasket is used as a seal between the water pump and timing chain case/cover.

    If water pump is replaced because of bearing/shaft damage, or leaking shaft seal, the mechanical cooling fan assembly should also be inspected. Inspect for fatigue cracks, loose blades, or loose rivets that could have resulted from excessive vibration. Replace fan if any of these conditions are found. Also check condition of the thermal viscous fan drive. Refer to Viscous Fan Drive in this group.

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    Position fan shroud and fan blade/viscous fan drive assembly to vehicle as a complete unit.
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    Jan 10, 2009 | 2000 Jeep Grand Cherokee

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