Question about 2005 Chevrolet TrailBlazer

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I have a 2005 Cheverolet Trailblazer that I have just changed the serpentine belt and the tensioner pulley on. However, when I crank the engine the fan is bumping and jumping and there is a strange sound. PLEASE HELP

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Sounds to me like your waterpump is bad esspecailly if the fan is mounted to the waterpumpif so change waterpump

Posted on Jul 23, 2010

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What is ideler pully 2005 trailblazer


If you look at the engine from the front, there is a big belt called a serpentine belt. That belt connects the fan, air conditioner, power steering pump, alternator etc. There is a pulley on it the maintains the tension. The is the idler pulley. They are plastic in most cases and wear out or squeal.

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1 Answer

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change serpentine belt or one of the pulleys in seized! remove belt and with hand move all pulleys except for the crank pulley! if your able to move all pulleys then u good! just change belt and tensioner pulley! let mme know what happens when done!

Mar 25, 2013 | 2002 Pontiac Montana

1 Answer

Serpentine belt diagram for a 2003 Chevy unpalatable 4.3


Pop the hood of the car and locate the serpentine belt routing diagram. The diagram on the 2003 Chevrolet Impala is on top of the fan shroud. The diagram will be a picture of all of the accessory pulleys and how the serpentine belt is routed among the pulleys. This diagram will give you the exact direction for routing the new belt onto the pulleys. If you cannot find a serpentine belt routing diagram, take a notepad and pen and draw out the exact routing diagram of the old belt across the pulleys.

  • 2 Locate the serpentine belt tensioner. It is located below the alternator on the left front side of the engine. The tensioner on the 3.4 liter, 3.5 liter and the 3.9 liter engines will require a 3/8 ratchet to release the belt tensioner. The 3.8 liter engine will require a ratchet and a 15 mm socket for the belt tensioner. Rotate the belt tensioner clockwise to loosen and remove the belt from the belt tensioner pulley.
  • 3 Slide the old belt from the belt tensioner pulley. Remove the belt from the remaining pulleys and pull the belt from the engine compartment.
  • 4 Route the new belt across the crankshaft pulley first. The crankshaft pulley is the big pulley on the bottom of the engine in the center. Then route the serpentine belt across the remaining pulleys as directed by the serpentine belt routing diagram. Leave the belt tensioner pulley for last.
  • 5 Rotate the belt tensioner clockwise again to relieve the tension and slide the new belt across the top of the belt tensioner pulley. Release the belt tensioner and the belt will tighten up as the tensioner applies pressure to the belt. Make sure the new belt is properly seated in all the pulleys.
  • 6 Crank the engine and inspect the belt again to make sure that it stays seated in the pulleys.

  • Read more: How to Replace a Serpentine Belt on a 2003 Chevrolet Impala ' eHow.co.uk http://www.ehow.co.uk/how_6120665_replace-belt-2003-chevrolet-impala.html#ixzz1Yi6QLAjb

    Sep 21, 2011 | 2003 Chevrolet Impala

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    (1999 pontiac grand prix 3100 v6) how do I remove and replace my serpentine belt successfully?


    Instructions Things You'll Need
    • 3/8-inch drive breaker bar
    • Metric socket kit
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      • 1

        Park the Pontiac in a safe work area and open the hood.

      • 2

        Inspect the top of the black plastic cover that surrounds the fan for the serpentine belt routing diagram. This diagram has the instructions for installing the new serpentine belt around the accessory pulleys.

      • 3

        Inspect the front of the engine and locate the automatic belt tensioner. The tensioner on the 1999 Pontiac model vehicles is located between the alternator and the crankshaft pulley. The tensioner has a pulley on one end with a bolt head in the center of the pulley. Use the bolt head to rotate the tensioner.

      • 4

        Turn the tensioner counterclockwise with the breaker bar and a metric socket. Pull the belt out from under the tensioner pulley with your other hand. Then, slowly let the tensioner retract until it stops.

      • 5

        Pull the belt out of the other remaining pulleys. Then, pull the belt out of the engine bay and lay it on the ground.

      • 6

        Route the new belt around the crankshaft pulley. Then, route the new belt around the other remaining pullleys by using the serpentine belt routing diagram for instructions.

      • 7

        Rotate the tensioner pulley counterclockwise with the breaker bar and socket. Then, slide the new belt under the tensioner pulley. Slowly let the tensioner retract until it stops. The tensioner pulls all of the slack out of the belt and brings the new belt to the proper tension. Remove the breaker bar and socket from the tensioner pulley.

      • 8

        Inspect the new belt to ensure that it is seated inside of all the accessory pulleys as directed by the diagram. Then, crank the engine and allow it to run for about 15 seconds. Turn the engine off. Inspect the belt again once more to ensure that
        the belt is still around each pulley. Close the hood.



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    1 Answer

    How do i release the tension belt ... cant seem to find bolt being referred to in other docs


    Here's the procedure on how to release and replace the tension belt of your car.

    Step 1
  • Open the hood on the Volvo S-60 and find the serpentine-belt routing diagram. The diagram should be attached to the top of the fan shroud that covers the radiator. If not, draw out the exact routing method of the serpentine belt around each pulley with a pen and a piece of paper.
  • Step 2 Locate the serpentine-belt tensioner that is in the very center of the engine. The tensioner will have a square bolt head in the center of the tensioner pulley.
  • Step 3 Slide the open end of the 5/8-wrench onto the square bolt head in the center of the belt-tensioner pulley. Turn the tensioner pulley counterclockwise and slide the serpentine belt off of the tensioner pulley.
  • Step 4 Remove the serpentine belt from the other pulleys and pull the belt out of the engine compartment.
  • Step 5 Slide the new serpentine belt into the engine compartment and around the crankshaft pulley.
  • Step 6 Route the new serpentine belt around each pulley. Turn the belt-tensioner pulley counterclockwise again and slide the serpentine belt around the tensioner pulley. Release the tensioner and it will tighten the belt around the pulleys. Look over the belt to ensure that it is inside of each pulley.
  • Step 7 Crank the S-60 and look over the serpentine belt with the motor running. Let the engine run for about one minute and shut the engine off. Close the hood.
  • Aug 12, 2010 | 2001 Volvo S60

    1 Answer

    How do you change the serpentine belt on a 2004 Trailblazer?


    Note the drive belt routing, usually there is a sticker under the hood with the routing. using the right socket and a breaker bar, rotate the drive belt tensioner clockwise to relieve tension. remove belt and slowly release breaker bar tesnsion. for V8, Install on all pulleys except generator, loosen tension and install on generator. for 4.2L install belt over all pulleys except tensioner, relieve tension and install over tensioner, slowly release breaker bar tension.

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    There is a tensioner pulley that has a nut in the middle of it, loosen that nut and there is a tensioner bolt that when you loosen it, it slides the pulley away from the belt to replace it.

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    Crank the tensioner to get some slack in the belt and slide it off the uppermost, most easily accessible pulley. Remove the old belt. Route the new belt in accordance with the belt routing diagram and crank the tensioner the same direction as before to begin getting the belt over the uppermost pulley. Slide a screwdriver under the belt and over the pulley to leverage the new belt on. Release the tensioner and check for belt tautness. If the belt is loose, you've either purchased the wrong size or have misrouted the serpentine belt.

    Jul 03, 2009 | 2005 Toyota Corolla

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