Mitsubishi Montero, Sport 1998-06

Oil Pump

Print

Inspection



2.4L Engine


Click image to see an enlarged view

Fig. Checking oil pump side clearance-2.4L Engine

  1. Assemble the oil pump gear to the front case and rotate it to ensure smooth rotation with no looseness.
  2.  
  3. Ensure that there is no ridge wear on the contact surface between the front case and the gear surface of the oil pump cover.
  4.  
  5. Check the side clearance. The drive gear specification is 0.004-0.006 inch (0.10-0.14 mm) and the driven gear specification is 0.003-0.004 inch (0.06-0.16 mm).
  6.  

3.0L, 3.5L, & 3.8L Engines
  1. Check the tip clearance. The specification is 0.003-0.007 inch (0.06-0.18 mm).
  2.  
  3. Check the side clearance. The specification is 0.002-0.004 inch (0.04-0.10 mm).
  4.  
  5. Check the body clearance. The specification is 0.004-0.007 inch (0.10-0.18 mm).

    Click image to see an enlarged view

    Fig. Measuring oil pump tip clearance-3.0L, 3.5L, 3.8L Engines



    Click image to see an enlarged view

    Fig. Measuring oil pump side clearance-3.0L, 3.5L, 3.8L Engines



    Click image to see an enlarged view

    Fig. Measuring oil pump body clearance-3.0L, 3.5L, 3.8L Engines

  6.  

Removal & Installation



  1. Before servicing the vehicle, refer to the Precautions section.
  2.  
  3. Drain the engine oil.
  4.  
  5. Remove or disconnect the following:

    Negative battery cable
     
    Timing belt
     
    Oil pressure switch
     
    Oil dipstick
     
    Oil pans from the engine
     
    Oil baffle and screen
     
    Oil pump mounting bolts and the pump from the front of the engine
     

  6.  


NOTE
Note the position of each oil pump case retaining bolts to facilitate installation. The bolts are of different length.

To install:



Click image to see an enlarged view

Fig. Exploded view of the oil pump, oil pan and related components-3.8L engine shown, others similar

  1. Clean the gasket mounting surfaces of the pump and engine block.
  2.  
  3. Prime the pump by pouring fresh oil into the inlet and turning the rotors or by packing pump with petroleum jelly. Using a new gasket, install the oil pump on the engine and tighten all bolts to 10 ft. lbs. (14 Nm).
  4.  
  5. Clean out the oil pick-up or replace as required. Replace the oil pick-up gasket ring and install the pick-up to the pump.
  6.  
  7. Install or connect the following:

    Oil filter and the bracket. Torque the bolts to 17 ft. lbs. (23 Nm).
     
    Oil baffle and screen. Torque the bolts to 13 ft. lbs. (18 Nm).
     
    Oil pans. Torque the engines to 52 inch lbs. (5.9 Nm).
     
    Oil pressure switch. Torque the switch to 87 inch lbs. (9.8 Nm).
     
    Timing belt
     
    Dipstick
     
    Negative battery cable
     

  8.  
  9. Refill the engine with the proper amount of oil.
  10.  
  11. Start the engine and check for proper oil pressure. Check for leaks.
  12.  

2.4L Engine
  1. Before servicing the vehicle, refer to the precautions in the beginning of this section.
  2.  
  3. Drain the oil and remove the oil filter.
  4.  
  5. Remove or disconnect the following:
    CAUTION
    Wait at least 90 seconds after the negative battery cable is disconnected to prevent possible deployment of the air bag.



    Negative battery cable
     



    Timing belt covers, timing belts and sprockets
     
    Oil pan and gasket
     
    Oil pump pick-up and gasket
     
    Oil pressure relief plunger plug and gasket
     
    Spring and plunger from the oil filter bracket
     
    Bracket mounting bolts and the oil filter mount and gasket
     
    Plug cap and gasket that covers the oil pump driven gear shaft. Using special tool MD998162 this is located on the right side of the front case, just above the protruding drive gear shaft.
     
    Retaining bolt from the oil pump driven gear located behind the plug removed earlier
     
    Front case mounting bolts and the case from the block
     
    Case gasket from the block
     

  6.  

To install:

  1. Prime the pump by pouring fresh oil into the pump intake and turning the driveshaft until oil comes out of the pressure port. Repeat this a few times until no air bubbles are present. Replace all seals on the case assembly.

    Click image to see an enlarged view

    Fig. Exploded view of the oil pump, oil pan and related components-2.4L engine shown; other engines are similar

  2.  
  3. Install a special seal guide to the crankshaft, MD998285, so the smaller diameter faces outward. Coat the outer diameter of the seal with clean engine oil.
  4.  
  5. Install or connect the following:

    New front case gasket and the front case by carefully positioning the crankshaft seal over the seal guide and lining up all bolt holes. Torque the bolts to 17 ft. lbs. (23 Nm).
     

  6.  
  7. Remove the plug from the left side of the block. Hold the left side silent shaft by inserting a tool in the plug hole and tighten the driven gear bolt to 26 ft. lbs. (35 Nm)

    New O-ring and the plug cover
     
    Oil filter mounting bracket gasket
     
    Mounting bracket and bolts tightening the oil filter mounting bracket bolts to 12 ft. lbs. (16 Nm).
     

  8.  
  9. Clean or replace the oil pick-up screen and install with a new gasket.
  10.  
  11. Install or connect the following:

    Oil pan using a new gasket
     
    Timing sprockets, belts and covers
     
    Negative battery cable
     

  12.  
  13. Refill the engine with the proper amount of engine oil.
  14.  
  15. Start the engine and check for proper oil pressure. Check for leaks.
  16.  

  1. Before servicing the vehicle, refer to the Precautions section.
  2.  
  3. Drain the oil and remove the oil filter.
  4.  
  5. Remove or disconnect the following:
    CAUTION
    Wait at least 90 seconds after the negative battery cable is disconnected to prevent possible deployment of the air bag.



    Negative battery cable
     



    Timing belt covers, timing belts and sprockets
     
    Oil pan and gasket
     
    Oil pump pick-up and gasket
     
    Oil pressure relief plunger plug and gasket
     
    Spring and plunger from the oil filter bracket
     
    Bracket mounting bolts and the oil filter mount and gasket
     
    Plug cap and gasket that covers the oil pump driven gear shaft. Using special tool MD998162 this is located on the right side of the front case, just above the protruding drive gear shaft.
     
    Retaining bolt from the oil pump driven gear located behind the plug removed earlier
     
    Front case mounting bolts and the case from the block
     
    Case gasket from the block
     

  6.  

To install:

  1. Prime the pump by pouring fresh oil into the pump intake and turning the driveshaft until oil comes out of the pressure port. Repeat this a few times until no air bubbles are present. Replace all seals on the case assembly.

    Click image to see an enlarged view

    Fig. Exploded view of the oil pump, oil pan and related components-2.4L engine shown; other engines are similar

  2.  
  3. Install a special seal guide to the crankshaft, MD998285, so the smaller diameter faces outward. Coat the outer diameter of the seal with clean engine oil.
  4.  
  5. Install or connect the following:

    New front case gasket and the front case by carefully positioning the crankshaft seal over the seal guide and lining up all bolt holes. Torque the bolts to 17 ft. lbs. (23 Nm).
     

  6.  
  7. Remove the plug from the left side of the block. Hold the left side silent shaft by inserting a tool in the plug hole and tighten the driven gear bolt to 26 ft. lbs. (35 Nm)

    New O-ring and the plug cover
     
    Oil filter mounting bracket gasket
     
    Mounting bracket and bolts tightening the oil filter mounting bracket bolts to 12 ft. lbs. (16 Nm).
     

  8.  
  9. Clean or replace the oil pick-up screen and install with a new gasket.
  10.  
  11. Install or connect the following:

    Oil pan using a new gasket
     
    Timing sprockets, belts and covers
     
    Negative battery cable
     

  12.  
  13. Refill the engine with the proper amount of engine oil.
  14.  
  15. Start the engine and check for proper oil pressure. Check for leaks.
  16.  

3.0L And 3.5L Engines
  1. Before servicing the vehicle, refer to the precautions in the beginning of this section.
  2.  
  3. Drain the engine oil.
  4.  
  5. Remove or disconnect the following:
    NOTE
    Note the position of each oil pump case retaining bolts to facilitate installation. The bolts are of different length.



    Negative battery cable
     
    Timing belt
     
    Oil pressure switch
     
    Oil dipstick
     
    Oil pans from the engine
     
    Oil baffle and screen
     
    Oil pump mounting bolts and the pump from the front of the engine
     

  6.  

To install:

Click image to see an enlarged view

Fig. Exploded view of the oil pump, oil pan and related components-2.4L engine shown; other engines are similar

  1. Clean the gasket mounting surfaces of the pump and engine block.
  2.  
  3. Prime the pump by pouring fresh oil into the inlet and turning the rotors or by packing pump with petroleum jelly. Using a new gasket, install the oil pump on the engine and tighten all bolts to 10 ft. lbs. (14 Nm).
  4.  
  5. Clean out the oil pick-up or replace as required. Replace the oil pick-up gasket ring and install the pick-up to the pump.
  6.  
  7. Install or connect the following:

    Oil filter and the bracket. Torque the bolts to 17 ft. lbs. (23 Nm).
     
    Oil baffle and screen. Torque the bolts to 13 ft. lbs. (18 Nm).
     
    Oil pans. Torque the engines to 52 inch lbs. (5.9 Nm).
     
    Oil pressure switch. Torque the switch to 87 inch lbs. (9.8 Nm).
     
    Timing belt
     
    Dipstick
     
    Negative battery cable
     

  8.  
  9. Refill the engine with the proper amount of oil.
  10.  
  11. Start the engine and check for proper oil pressure. Check for leaks.
  12.  

3.0L, 3.5L, & 3.8L Engines
  1. Before servicing the vehicle, refer to the Precautions Section.
  2.  
  3. Drain the engine oil.
  4.  
  5. Remove or disconnect the following:
    NOTE
    Note the position of each oil pump case retaining bolts to facilitate installation. The bolts are of different length.



    Negative battery cable
     
    Timing belt
     
    Oil pressure switch
     
    Oil dipstick
     
    Oil pan(s)
     
    Oil baffle and screen
     
    Oil pump mounting bolts and the pump from the front of the engine
     

  6.  

To install:

Click image to see an enlarged view

Fig. Oil pump and related components-3.0L engine



Click image to see an enlarged view

Fig. Oil pump and related components-3.5L engine



Click image to see an enlarged view

Fig. Oil pump and related components-3.8L engine

  1. Clean the gasket mounting surfaces of the pump and engine block.
  2.  
  3. Prime the pump by pouring fresh oil into the inlet and turning the rotors or by packing pump with petroleum jelly. Using a new gasket, install the oil pump on the engine and tighten all bolts to 10 ft. lbs. (14 Nm).
  4.  
  5. Clean out the oil pick-up or replace as required. Replace the oil pick-up gasket ring and install the pick-up to the pump.
  6.  
  7. Install or connect the following:

    Oil filter and the bracket
     
    Oil baffle and screen
     
    Oil pan(s)
     
    Oil pressure switch
     
    Timing belt
     
    Dipstick
     
    Negative battery cable
     

  8.  
  9. Refill the engine with the proper amount of oil.
  10.  
  11. Start the engine and check for proper oil pressure. Check for leaks.
  12.  

 
label.common.footer.alt.autozoneLogo