Nissan 240SX/Altima 1993-1998 Repair Guide

Oil Pump

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REMOVAL & INSTALLATION



See Figures 1 and 2



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Fig. Fig. 1: Exploded view of the oil pump and front cover assembly



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Fig. Fig. 2: Inspect the oil pressure relief valve for damage, and replace if necessary

  1. Disconnect the negative battery cable.
  2.  
  3. Drain and recycle the engine coolant.
  4.  
  5. Drain and recycle the engine oil.
  6.  
  7. Remove the cam sprocket cover.
  8.  
  9. Remove the front cover.
  10.  

The oil pump assembly is mounted in the front cover.

  1. Unfasten the oil pump cover and remove the gears from the front cover housing.
  2.  

To install:

When installing the timing cover, be sure to replace the O-ring seal for the oil hole in the front cover.

  1. Install the outer gear into the cavity in the front cover housing. Make sure the gears mesh properly and prime the oil pump with clean engine oil.
  2.  
  3. Install the oil pump cover. Tighten the retaining screws to 33-44 inch lbs. (3.7-5.0 Nm) and tighten the bolts to 12-15 inch lbs. (16-21 Nm).
  4.  
  5. Clean the mating surfaces thoroughly and apply a 0.079-0.118 in. (2-3mm) thick continuous bead of liquid gasket to the mating surfaces of the timing cover.
  6.  
  7. Install the front cover. Tighten the M6 mounting bolts to 56-66 inch lbs. (6.4-7.5 Nm) and tighten the M8 mounting bolts to 12-14 ft. lbs. (15-19 Nm).
  8.  
  9. Clean the mating surfaces thoroughly and apply a 0.079-0.118 in. (2-3mm) thick continuous bead of liquid gasket to the mating surfaces of the cam sprocket cover.
  10.  
  11. Install the cam sprocket cover. Tighten the M6 mounting bolts to 56-66 inch lbs. (6.4-7.5 Nm) and tighten the M8 mounting bolts to 12-14 ft. lbs. (15-19 Nm).
  12.  
  13. Refill and bleed the cooling system.
  14.  
  15. Refill the engine with the proper grade and viscosity of engine oil.
  16.  
  17. Start the engine and verify correct oil pressure.
  18.  


WARNING
If correct oil pressure does not exist, stop the engine immediately and correct the problem. Running the engine with improper oil pressure will cause severe damage.

  1. Check for leaks.
  2.  

 
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