Tuesday, November 22, 2011

How to replace water pump on Chevrolet Blazer?

Water pump is important part/component for car cooling system.Water pump maintenance is required,to keep water pump free from problems.But in case if it gets faulty then it has to be replaced.

If you need dis-assembly or replacement instructions for any other auto/car part, or you want to ask question related to your car/truck jeep problem then please leave the comment with your details, so I can provide you the required instructions and solutions.

The procedure to replace cars water pump is as follows :----

Water Pump


  1. Before servicing the vehicle, refer to the Precautions section.
  2. Disconnect the negative battery cable.
  3. Drain the engine cooling system.
  4. 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.
  5. Relieve the belt tension and remove the accessory drive belts or the serpentine drive belt, as applicable.
  6. Remove or disconnect the following:
    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.

    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

    Click image to see an enlarged view
    Fig. Exploded view of the water pump assembly mounting-4.2L engine

    Click image to see an enlarged view
    Fig. Exploded view of the water pump assembly mounting-4.3L engine

    Click image to see an enlarged view
    Fig. Exploded view of the water pump assembly mounting-5.3L engine
To install:
  1. Clean the gasket mounting surfaces.
    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.

This details will help.
For more car related problem troubleshooting:---

This are the sections, you can go through and click the link to read its troubleshooting.


The car will not start?


Car will not crank?


Car has no spark?


How to troubleshoot car battery?


How to test starter solenoid?



How to test cars starter?


How to replace starter in car?


car will turn over but will not start?


Car wont start?


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