Question about 2002 Chevrolet TrailBlazer

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Serpentine belt replacement on 2002 trailblazer 4.2 l engine

Do you have to remove fan and fan cover first?

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  • Anonymous Apr 25, 2009

    serpentine belt came off. should put the old on or buy a new. do i have to remove the fan

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Just replaced the water pump on my 2004 trailblazer the other day, removed the fan to get the water pump out. You do not have to remove the fan just to change the belt.

Posted on Jan 28, 2010

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How to replace water pump


Removal & Installation

  1. Disconnect the negative battery cable.
  2. Drain the engine cooling system.
  3. For 5.3L engines, loosen the air cleaner outlet duct clamps at the throttle body and Mass Airflow/Intake Air Temperature (MAP/IAT) sensor. Remove the bolt and air cleaner outlet duct.
  4. Relieve the belt tension and remove the accessory drive belts or the serpentine drive belt, as applicable.
  5. Remove or disconnect the following:

NOTE
For the hoses on some engines, removal may be easier if the hose is left attached until the pump is free from the block. Once the pump is removed from the engine, the pump may be pulled (giving a better grip and greater leverage) from the tight hose connection.W

WARNING
Note the positions of all retainers as some engines will utilize different length fasteners in different locations and/or bolts and studs in different locations.

  • Upper fan shroud
  • Fan or fan and clutch assembly, as applicable
  • Water pump pulley; use a suitable tool to hold the pulley while removing the bolts
  • Coolant hose(s) from the water pump
  • Water pump retainers
  • Water pump from the engine



4.2L Pump Location26010723-pqcu5dneux0l02jg41pvmzkd-2-0.gif
5.3L Pump Location


26010723-pqcu5dneux0l02jg41pvmzkd-2-1.gif
To install:
  1. Clean the gasket mounting surfaces.

    NOTE

    The water pumps on some of the engines covered may have been installed using sealer only, no gasket, at the factory. If a gasket is supplied with the replacement part, it should be used. Otherwise, a 1 / 8 in. (3mm) bead of RTV sealer should be used around the sealing surface of the pump.
  2. Apply sealant to the water pump retainer threads.
  3. Install or connect the following:

    • Water pump using a new gasket. Tighten the water pump retainers to 89 inch lbs. (10 Nm) for 4.2L engines, or to 30 ft. lbs. (41 Nm) for 4.3L engines. For 5.3L engines, tighten the bolts to 11 ft. lbs. (15 Nm), then to 22 ft. lbs. (30 Nm).
    • Coolant hose(s)
    • Water pump pulley. Tighten the pulley bolts to 18 ft. lbs. (25 Nm).
    • Fan or fan and clutch assembly
    • Serpentine drive belt (if equipped) by positioning the belt over the pulleys and carefully allow the tensioner back into contact with the belt.
    • V-belts (if equipped) and adjust the tension
    • Upper fan shroud
    • Negative battery cable
  4. Refill the engine cooling system.
  5. Run the engine and check for leaks.

Dec 16, 2015 | 2004 Chevrolet TrailBlazer

1 Answer

2002 CHEVY TRAILBLAZER keeps setting a FAN Speed Sensor Code.


CJ, this is very common for the I6 engines in TB's and Envoys. You need a new fan clutch. Triple check the wire connectors first, located on the top of the radiator on the drivers side, make sure those are in tact first. Then replace the fan clutch. Might as well do your water pump and serpentine belt while you're in there.

Jul 08, 2015 | 2002 Chevrolet TrailBlazer

1 Answer

2002 chevrolet trailblazer diagnostic code p0013, p0014


Two possibilities, poor electrical connection at the cam position actuator sensor (CPAS) connector or a clogged CPAS. Check connector first for oil residue. The CPAS itself is prone to clog if the oil is not changed at the proper intervals. Unfortunately, the CPAS is a little difficult to remove since access to one of its bolts requires the removal of the power steering pump.

Nov 20, 2012 | 2002 Chevrolet TrailBlazer

2 Answers

Trailblazer serpentine belt diagram


Hi, first, keep this diagram around as you will need it to route the serpentine belt when you reinstall it. There may also be a diagram under the hood by the radiator.
7e98dff.jpg Next, follow this link and watch the video that shows you how to replace a serpentine belt...
http://www.wonderhowto.com/how-to/video/how-to-inspect-and-replace-your-car-s-serpentine-belt-267229/
Take care

Aug 03, 2010 | 2002 Chevrolet TrailBlazer

1 Answer

I have an upper knock on the front of the engine. What could it be?


While the engine is cold, remove the serpentine belt and start the engine and see if the knock goes away. If the knock goes away, then you might have a bad belt pulley. Good luck, Gary

Jul 27, 2010 | 2002 Chevrolet TrailBlazer

1 Answer

How do I replace the Knock Sensors on a 2002 GMC Sierra 2500HD 6.0L V8 Gas engine? How do I change the serpentine and AC belts? Last but not least how to replace the drivers front differential seal?


remove the intake manifold ,remove radiator ,remove radiator intake and outake housing, remove fan ,remove all belts: power steering, alternator and if you have a/c, remove harmonic balancer ,remove timing belt covers, remove timing belt remove intake housinng once you have remove all the above, your freaken engine will look naked, you can see the location of the knock sensor is locate in the engine valley hope this helps u might wnat to google knock sensor so u knoe what it looks like

Feb 19, 2010 | 2002 GMC Sierra 2500HD

1 Answer

How to remove 2006 trailblazer belt


go to any autopart store and purchase a serpentine belt tool, they are inexpesive and come with parts 4 many different vehicles, then place tool on tensioner pulley and apply pressure untill u have enough slack in belt to remove it

Oct 06, 2009 | 2006 Chevrolet Trailblazer

2 Answers

Water pump replacement - how involved is replacing the water pump


The waterpump on a chevy suburban can be removed once you remove the radiator fan.
  1. Drain the coolant from the system.
  2. Here is a way to remove the fan clutch withouy a fan clutch tool. The trick is to leave the belt on and tight.
  3. Take a 1 7/16 inch wrench and put it behind the fan onto the big shaft nut attaching the fan to the water pump. P
  4. ut it straight up and crack it counterclockwise with a hammer.
  5. This should loosen the nut.
  6. After that just spin the fan off and the rest is easy.
  7. Make sure you clean the old seal off of the engine. It is small and easy to miss.
  8. remove the serpentine belt.
  9. remove the hoses connecting to the water pump
  10. remove 4 bolts holding the water pump onto the block
  11. clean the block of any old gasket
  12. fit the new waterpump and new gasket.
  13. connect the hoses to the pump.
  14. refit the serpentine belt
  15. refit the fan
  16. refit the rad and cowling
  17. fill it up with coolant.
  18. Run the engine and check for leaks.

Oct 03, 2009 | 2002 Chevrolet Suburban

3 Answers

Can't get the fan off a 2002 trailblazer


dont hold it,i personally bang the fan clutch nut with a long chicel and hammmer.it sounds funny but works great.do it before taking belt off.

Jun 13, 2009 | 2002 Chevrolet TrailBlazer

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