Subaru Forester 1998-05

Oil Pump

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Inspection



  1. Check the oil pump case for worn shaft hole, clogged oil passage, worn rotor chamber, cracks, and other faults.
  2.  
  3. Check the oil seal lips for deformation, hardening, wear, etc. and replace if defective.
  4.  
  5. Measure the tip clearance of rotors. If clearance exceeds the standard, replace the rotors as a matched set.
    1. 0.0016-0.0055 in. (0.04-0.14 mm)
    2.  

  6.  
  7. Measure the clearance between the outer rotor and oil pump rotor housing. If clearance exceeds the standard, replace the rotor.
    1. 0.0039-0.0069 in. (0.10-0.18 mm)
    2.  

  8.  
  9. Measure the clearance between the oil pump inner rotor and pump cover. If clearance exceeds the standard, replace the rotor or pump body.
    1. 0.0008-0.0028 in. (0.02-0.07 mm)
    2.  

  10.  
  11. Check the valve for fitting condition and damage, and the relief valve spring for damage and deterioration. Replace the parts if defective.

    Click image to see an enlarged view

    Fig. Measuring for tip clearance of the rotors of the oil pump.



    Click image to see an enlarged view

    Fig. Measuring the case clearance of the oil pump.



    Click image to see an enlarged view

    Fig. Measuring the side clearance of the oil pump.

  12.  

Removal & Installation



  1. Before servicing the vehicle, refer to the Precautions section.
  2.  
  3. Drain the cooling system.
  4.  
  5. Drain the engine oil into a separate container.
  6.  
  7. Remove or disconnect the following:

    Negative battery cable
     
    Engine undercover
     
    Water pipe and hose between oil cooler and water pump
     
    Radiator
     
    Crankcase Position (CKP) Sensor
     
    Camshaft Position (CMP) Sensor
     
    Belt(s) and rear tensioner
     
    Crankshaft pulley
     
    Water pump
     
    Timing belt, and belt guide, if equipped
     
    Crankshaft sprocket
     
    Oil pump mounting bolts and carefully pry the pump from the engine block
     

  8.  


WARNING
Use extreme care not to damage the engine block or the oil pump during removal of the pump.

To install:

  1. Apply a continuous bead sealant to the mating surfaces of the oil pump.
  2.  
  3. Install or connect the following:

    New front seal to the oil pump coat the inside of the seal with engine oil
     
    New O-ring to the oil pump
     
    Oil pump. Torque the bolts to 56 inch lbs. (6.4 Nm).
     
    Crankshaft sprocket
     
    Timing belt, and belt guide, if equipped
     
    Water pump
     
    Crankshaft pulley
     
    Belt(s) and rear tensioner
     
    CMP Sensor
     
    CKP Sensor
     
    Radiator
     
    Engine coolant pipe
     
    Engine undercover
     
    Negative battery cable
     

  4.  
  5. Refill the cooling system.
  6.  
  7. Refill the engine to the proper level with the recommended oil.
  8.  

  1. Drain the cooling system.
  2.  
  3. Drain the engine oil into a separate container.
  4.  
  5. Remove or disconnect the following:
    WARNING
    Use extreme care not to damage the engine block or the oil pump during removal of the pump.



    Negative battery cable
     
    Engine undercover
     
    Water pipe and hose between oil cooler and water pump
     
    Radiator
     
    Crankcase Position (CKP) Sensor
     
    Camshaft Position (CMP) Sensor
     
    Belt(s) and rear tensioner
     
    Crankshaft pulley
     
    Water pump
     
    Timing belt, and belt guide, if equipped
     
    Oil pump mounting bolts and carefully pry the pump from the engine block
     

  6.  

To install:

  1. Apply a continuous bead sealant to the mating surfaces of the oil pump.
  2.  
  3. Install or connect the following:

    New front seal to the oil pump coat the inside of the seal with engine oil
     
    New O-ring to the oil pump
     
    Oil pump. Torque the bolts to 56 inch lbs. (6.4 Nm).
     
    Timing belt, and belt guide, if equipped
     
    Water pump
     
    Crankshaft pulley
     
    Belt(s) and rear tensioner
     
    Camshaft Position (CMP) Sensor
     
    Crankcase Position (CKP) Sensor
     
    Radiator
     
    Engine coolant pipe
     
    Engine undercover
     
    Negative battery cable
     

  4.  
  5. Refill the cooling system.
  6.  
  7. Refill the engine to the proper level with the recommended oil.
  8.  
  9. Start the engine and check for leaks.
  10.  

  1. Disconnect the negative battery cable. Drain the cooling system.
  2.  
  3. On the DOHC (Turbo) engine, remove the collector cover.
  4.  
  5. Raise and support the vehicle safely.
  6.  
  7. Remove the under cover.
  8.  
  9. On the DOHC engine, remove the bolts which retain the water pipe of the oil cooler to the oil pump. Remove the water pipe and hoses between the oil cooler and the water pump.
  10.  
  11. Lower the vehicle. Remove the radiator.
  12.  
  13. To remove the front side V belt, remove the belt covers. Loosen the lock bolt. Loosen the slider bolt. Remove the front side belt.
  14.  
  15. To remove the rear side V belt, remove the belt covers. Loosen the lock bolt. Loosen the slider bolt. Remove the rear side belt.
  16.  
  17. On the SOHC engine remove the belt tensioner.
  18.  
  19. On the DOHC engine remove the rear side V belt tensioner
  20.  
  21. Remove the crankshaft position sensor.
  22.  
  23. Remove the crankshaft pulley bolt.
  24.  
  25. Lock the crankshaft in place using tool ST499977100 for the SOHC engine and tool ST499207400 for the DOHC engine, or equivalent.
  26.  
  27. Remove the crankshaft pulley.
  28.  
  29. Remove the water pump.
  30.  
  31. If equipped, remove the timing belt guide. Remove the crankshaft sprocket.
  32.  
  33. Remove the oil pump retaining bolts.
    NOTE
    When disassembling and checking the oil pump, loosen the relief valve plug before removing the oil pump from its mounting.

  34.  
  35. Using a flat tip tool remove the oil pump from the engine.
  36.  

To install:

  1. Be sure all mating surfaces are clean and free of dirt.
  2.  
  3. Apply liquid gasket part number 004403007, or equivalent to the mating surfaces of the oil pump.
  4.  
  5. Be sure to replace the O-ring with a new one.
  6.  
  7. Apply a thin coat of clean engine oil to the inside of the oil seal.
  8.  
  9. Position the oil pump to its mounting, aligning the notched area with the crankshaft and push the pump straight.
    NOTE
    Be sure that the oil seal lip is not folded.

  10.  
  11. Install the oil pump. Apply liquid gasket part number 004403042, or equivalent to the three retaining bolt threads. Install the bolts and tighten to 4.7 ft. lbs.
  12.  
  13. Continue the installation in the reverse order of the removal procedure.
  14.  
  15. Be sure to fill the cooling system with the proper grade and type coolant.
  16.  
  17. Start the engine and check for leaks. Correct, as required.
  18.  



Click image to see an enlarged view

Fig. Oil pump and related components

 
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