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    2003 Mitsubishi Diamante 3.5L MFI 6cyl

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    1720 S RIDGEWOOD A
    (386) 427-1210

    CLOSED Open at 7:30 AM

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    ISUZU Amigo/Pick-ups/Rodeo/Trooper 1981-1996

    Water Pump

    Print

    REMOVAL & INSTALLATION



    1.8L and 2.0L Engines

    See Figure 1



    Click image to see an enlarged view

    Fig. Fig. 1: Water pump service-1.8L and 2.0L engines

    This procedure may be easier if the radiator and shroud is removed. If the radiator is not removed, place cardboard in front so not to damage the radiator core

    1. Open the hood and disconnect the battery. Remove the lower engine cover.
    2.  
    3. Drain the cooling system.
    4.  


    CAUTION
    When draining the coolant, keep in mind that cats and dogs are attracted by ethylene glycol antifreeze, and are quite likely to drink any that is left in an uncovered container or in puddles on the ground. This will prove fatal in sufficient quantity. Always drain the coolant into a sealable container. Coolant should be reused unless it is contaminated or several years old.

    1. On cars without air conditioning, remove the fan.
    2.  
    3. On cars with air conditioning, remove the air pump and generator mounting bolts, then remove the fan and air pump drive belt (pivot the generator and air pump in toward the engine). Remove the fan and pulley with set plate. Remove the hoses to the pump.
    4.  
    5. Remove the 6 bolts attaching the water pump and remove the water pump assembly. Clean all gasket surfaces carefully.
    6.  

    To install:
    1. Install the 6 bolts attaching the water pump with a new gasket.
    2.  
    3. On cars with air conditioning, install the air pump and generator mounting bolts, then install the fan and air pump drive belt (pivot the generator and air pump in toward the engine). Install the fan and pulley with set plate. Install the hoses to the pump.
    4.  
    5. On cars without air conditioning, install the fan.
    6.  
    7. Refill the cooling system.
    8.  
    9. Connect the battery, start the engine and check for leaks.
    10.  

    Diesel Engine

    See Figure 2



    Click image to see an enlarged view

    Fig. Fig. 2: Water pump service-diesel engine

    1. Open the hood and disconnect the battery. Remove the radiator cap.
    2.  
    3. Drain the cooling system and remove the hoses from the pump.
    4.  


    CAUTION
    When draining the coolant, keep in mind that cats and dogs are attracted by ethylene glycol antifreeze, and are quite likely to drink any that is left in an uncovered container or in puddles on the ground. This will prove fatal in sufficient quantity. Always drain the coolant into a sealable container. Coolant should be reused unless it is contaminated or several years old.

    1. Remove the fan and pulley.
    2.  
    3. Remove the four attaching bolts holding the damper pulley. Remove the damper pulley.
    4.  
    5. Remove the engine dust covers.
    6.  
    7. Remove the bypass hose.
    8.  
    9. Remove the five bolts attaching the water pump and remove the pump and gasket.
    10.  

    To install:
    1. Clean all gasket surfaces carefully and inspect for nicks, cracks or deep scratches.
    2.  
    3. Use a new gasket. Torque all water pump mounting bolts to 11-18 ft. lbs. (15-23 Nm).
    4.  
    5. Install the bypass hose.
    6.  
    7. Install the engine dust covers.
    8.  
    9. Install the four attaching bolts holding the damper pulley and damper pulley.
    10.  
    11. Install the fan and pulley.
    12.  
    13. Install the hoses to the water pump and refill the cooling system.
    14.  
    15. Connect the battery, install the radiator cap, start the engine and check for leaks.
    16.  

    1986-92 2.3L Engine
    1. Disconnect the battery and drain the radiator.
    2.  


    CAUTION
    When draining the coolant, keep in mind that cats and dogs are attracted by ethylene glycol antifreeze, and are quite likely to drink any that is left in an uncovered container or in puddles on the ground. This will prove fatal in sufficient quantity. Always drain the coolant into a sealable container. Coolant should be reused unless it is contaminated or several years old.

    1. Remove the fan belt, plate, spacer, and pulley.
    2.  
    3. Remove the water pump and gasket.
    4.  

    To install:
    1. Before installation, clean the gasket surfaces carefully and torque the water pump retaining bolts to 18 ft. lbs. (25 Nm).
    2.  
    3. Install the fan belt, plate, spacer, and pulley.
    4.  
    5. Connect the battery, refill the radiator, start the engine and check for leaks.
    6.  

    1988-92 2.6L Engine
    1. Disconnect the negative battery cable.
    2.  
    3. Remove the undercover, if equipped, and drain the cooling system.
    4.  


    CAUTION
    When draining the coolant, keep in mind that cats and dogs are attracted by ethylene glycol antifreeze, and are quite likely to drink any that is left in an uncovered container or in puddles on the ground. This will prove fatal in sufficient quantity. Always drain the coolant into a sealable container. Coolant should be reused unless it is contaminated or several years old.

    1. Remove the drive belt from the water pump pulley.
    2.  
    3. Remove the coolant hose from the pump body, if so equipped.
    4.  
    5. Remove the fan blade and pulley from the pump hub.
    6.  
    7. Remove the water pump-to-engine bolts, the water pump and gasket.
    8.  
    9. Clean and inspect the mounting surfaces of the water pump and engine.
    10.  

    To install:
    1. Install a new gasket and the water pump; torque the water pump-to-engine bolts to 24-38 ft. lbs. (33-52 Nm).
    2.  
    3. Install the fan blade and pulley to the water pump.
    4.  
    5. Connect the water hose to the pump, if so equipped.
    6.  
    7. Install and adjust the drive belt.
    8.  
    9. Refill the cooling system and install the undercover, if equipped.
    10.  
    11. Connect the negative battery cable.
    12.  
    13. Operate the engine to normal operating temperatures and check for leaks.
    14.  

    1993-94 2.3L and 2.6L Engines
    1. Disconnect the negative battery cable.
    2.  
    3. Remove the undercover, if equipped, and drain the cooling system into a clean container so it can be reused.
    4.  
    5. Remove the drive belt from the water pump pulley.
    6.  
    7. Remove the fan blade and pulley from the pump hub.
    8.  
    9. Remove the water pump-to-engine bolts, the water pump and gasket.
    10.  
    11. Clean and inspect the mounting surfaces of the water pump and engine.
    12.  

    To install:
    1. Install a new gasket and the water pump; torque the water pump-to-engine bolts to 13.7 ft. lbs. (18 Nm).
    2.  
    3. Install the fan blade and pulley to the water pump.
    4.  
    5. Install and adjust the drive belt.
    6.  
    7. Refill the cooling system and install the undercover, if equipped.
    8.  
    9. Connect the negative battery cable.
    10.  
    11. Operate the engine to normal operating temperatures and check for leaks.
    12.  

    1995-96 4-Cylinder Engines

    See Figure 3



    Click image to see an enlarged view

    Fig. Fig. 3: Water pump assembly-4-cylinder engine

    1. Disconnect the negative battery cable.
    2.  
    3. Drain the coolant from the radiator by loosening the drain plug on the bottom of the radiator. Drain the coolant into a sealable container.
    4.  
    5. Disconnect the radiator hoses from the radiator.
    6.  
    7. Remove the air duct assembly.
    8.  
    9. Remove the lower fan guide clips and the bottom lock. Then, remove the lower fan shroud from the vehicle.
    10.  
    11. Remove the four upper fan shroud attaching bolts and remove the shroud.
    12.  
    13. Remove the four nuts attaching the fan to the water pump; then, remove the fan.
    14.  
    15. If equipped with power steering, remove the power steering belt.
    16.  
    17. If equipped with air conditioning, loosen the air conditioner idler pulley nuts; then, remove the two mounting bolts and the idler pulley. Remove the air conditioning compressor belt.
    18.  
    19. Remove the alternator belt.
    20.  
    21. Remove the pulley from the water pump.
    22.  
    23. Rotate the crankshaft to align the crankshaft pulley timing marks.
    24.  
    25. Remove the starter and install the flywheel holder (part No. J-38674).
    26.  
    27. Remove the crankshaft pulley bolt. Remove the crankshaft pulley.
    28.  
    29. Remove the upper and lower timing belt covers.
    30.  
    31. Remove the four bolts and one nut from the water pump. Remove the pump from the engine.
    32.  

    To install:
    1. Clean the water pump mounting surface.
    2.  
    3. Install the water pump with a new gasket. Tighten the mounting bolts to 14 ft. lbs. (19 Nm), and torque the nut to 20 ft. lbs. (25 Nm).
    4.  
    5. Install the timing belt lower and upper covers. Tighten the timing belt cover bolts to 4 ft. lbs. (6 Nm).
    6.  
    7. Install the crankshaft pulley, tighten the bolt to 90 ft. lbs. (122 Nm).
    8.  
    9. Install the starter motor. Tighten mounting bolts to 30 ft. lbs. (40 Nm).
    10.  
    11. Install the water pump pulley.
    12.  
    13. Install the alternator belt to the pulleys, do not tension the belt at this time.
    14.  
    15. If equipped with air conditioning, install the air conditioning belt and idler pulley, then adjust the belt tension.
    16.  
    17. If equipped with power steering, install and adjust the power steering belt.
    18.  
    19. Install the fan pulley to the water pump, and adjust the alternator belt tension. Tighten the fan attaching nuts to 20 ft. lbs. (27 Nm). Install the cooling fan.
    20.  
    21. Install the upper fan shroud.
    22.  
    23. Install the lower fan shroud.
    24.  
    25. Install the air duct assembly.
    26.  
    27. Connect the radiator hoses to the radiator.
    28.  
    29. Fill and bleed the air from the cooling system.
    30.  
    31. Connect the negative battery cable.
    32.  

    2.8L Engine

    See Figures 4, 5, 6, 7 and 8



    Click image to see an enlarged view

    Fig. Fig. 4: Water pump service-2.8L engine



    Click image to see an enlarged view

    Fig. Fig. 5: After removing the fan, the belt pulley will slide off-2.8L engine



    Click image to see an enlarged view

    Fig. Fig. 6: Since the heater hoses will be disconnected, it's a good time to replace them with new hoses and clamps-2.8L engine



    Click image to see an enlarged view

    Fig. Fig. 7: Removing the water pump retaining bolt-2.8L engine



    Click image to see an enlarged view

    Fig. Fig. 8: The water pump mating surface must be completely free of dirt and old gasket, or the new pump will leak-2.8L engine

    1. Disconnect the negative battery terminal.
    2.  
    3. Drain the cooling system.
    4.  


    CAUTION
    When draining the coolant, keep in mind that cats and dogs are attracted by ethylene glycol antifreeze, and are quite likely to drink any that is left in an uncovered container or in puddles on the ground. This will prove fatal in sufficient quantity. Always drain the coolant into a sealable container. Coolant should be reused unless it is contaminated or several years old.

    1. Remove the fan shroud and/or radiator support, as applicable.
    2.  
    3. Remove all drive belts.
    4.  
    5. Remove the fan and pulley from the water pump.
    6.  
    7. Remove the alternator upper and lower brackets. Remove the power steering pump lower bracket and swing aside.
    8.  
    9. Remove the bottom radiator hose and heater hose from the pump.
    10.  
    11. Remove the water pump.
    12.  

    To install:
    1. Clean the gasket mating surfaces with solvent and a scraper.
    2.  
    3. Coat the new gasket with RTV Sealer.
    4.  
    5. Install the gasket, pump and bolts. Torque the pump bolts 15-25 ft. lbs. (20-34 Nm).
    6.  
    7. Install the bottom radiator hose and heater hose to the pump.
    8.  
    9. Install the alternator upper and lower brackets. Install the power steering pump lower bracket.
    10.  
    11. Install the fan and pulley to the water pump.
    12.  
    13. Install all drive belts.
    14.  
    15. Install the fan shroud and/or radiator support, as applicable.
    16.  
    17. Refill the cooling system.
    18.  
    19. Connect the negative battery terminal. Start the engine and check for leaks.
    20.  

    3.1L Engine

    See Figure 9



    Click image to see an enlarged view

    Fig. Fig. 9: Water pump service-3.1L engine

    1. Disconnect the negative battery terminal.
    2.  
    3. Drain the cooling system.
    4.  
    5. Remove the upper and lower fan shroud.
    6.  
    7. Remove all drive belts.
    8.  
    9. Remove the fan and pulley from the water pump.
    10.  
    11. Remove the alternator upper and lower brackets. Remove the power steering pump lower bracket and swing aside.
    12.  
    13. Remove the bottom radiator hose and heater hose from the pump.
    14.  
    15. Remove the water pump.
    16.  

    To install:
    1. Clean the gasket mating surfaces with solvent and a scraper.
    2.  
    3. Coat the new gasket with RTV Sealer.
    4.  
    5. Install the gasket, pump and bolts. Torque the pump bolts 22 ft. lbs. (30 Nm).
    6.  
    7. Install the bottom radiator hose and heater hose to the pump.
    8.  
    9. Install the alternator upper and lower brackets. Install the power steering pump lower bracket.
    10.  
    11. Install the fan and pulley to the water pump.
    12.  
    13. Install all drive belts.
    14.  
    15. Install the upper and lower fan shroud.
    16.  
    17. Refill the cooling system.
    18.  
    19. Connect the negative battery terminal. Start the engine and check for leaks.
    20.  

    3.2L Engine

    See Figures 10, 11 and 12



    Click image to see an enlarged view

    Fig. Fig. 10: Timing belt routing-3.2L engine



    Click image to see an enlarged view

    Fig. Fig. 11: Water pump assembly-3.2L engine



    Click image to see an enlarged view

    Fig. Fig. 12: Water pump bolt tightening sequence-3.2L engine

    1. Disconnect the negative battery cable.
    2.  
    3. Drain the engine coolant into a clean container.
    4.  
    5. Remove the upper radiator hose.
    6.  
    7. Remove the timing belt and the idler pulley. The timing belt must be replaced if it has been contaminated by oil or coolant.
    8.  
    9. Unbolt and remove the water pump.
    10.  
    11. Remove the water pump gasket. Clean any gasket material or sealant residue from the water pump mating sealing surfaces.
    12.  

    To install:
    1. Install the water pump using a new gasket. Tighten the mounting bolts to 13 ft. lbs. (18 Nm) in a two-step crisscross sequence.
    2.  
    3. Install the idler pulley. Tighten the mounting bolt to 31 ft. lbs. (42 Nm).
    4.  
    5. Install and tension the timing belt.
    6.  
    7. Install the upper radiator hose.
    8.  
    9. Refill and bleed the cooling system.
    10.  
    11. Connect the negative battery cable. Start the engine and check for coolant leaks.
    12.  

     
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