ES300 1992-1997

Oil Pump

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Inspection



Specific to:

Lexus ES250 1990-1991

Lexus ES300 1992-1999

  1. Inspect relief valve:
    1. Coat the valve with engine oil and check that it falls smoothly into the valve hole by its own weight. If it doesn-t, replace the relief valve. If necessary, replace the oil pump assembly.

      Click image to see an enlarged view

      Fig. Inspect relief valve

    2.  

  2.  
  3. Place the drive and driven rotors into the oil pump body with the mark facing upward.

    Click image to see an enlarged view

    Fig. Place the drive and driven rotors into the oil pump body with the mark facing upward

  4.  
  5. Inspect rotor body clearance:
    1. Using a feeler gauge, measure the clearance between the driven rotor and body. If the body clearance is greater than maximum, replace the rotors as a set. If necessary, replace the oil pump assembly.

      Standard body clearance (Except 1999 model years): 0.0039-0.0069 in. (0.100-0.175 mm)
       
      Standard body clearance (1999 model years): 0.0098-0.0128 in. (0.250-0.325 mm)
       
      Maximum body clearance (Except 1999 model years): 0.0118 in. (0.30 mm)
       
      Maximum body clearance (1999 model years): 0.0157 in. (0.40 mm)

      Click image to see an enlarged view

      Fig. Inspect drive and driven rotors

       

    2.  

  6.  
  7. Inspect rotor side clearance:
    1. Using a feeler gauge and precision straight edge, measure the clearance between the rotors and precision straight edge. If the side clearance is greater than maximum, replace the rotors as a set. If necessary, replace the oil pump assembly.

      Standard side clearance: 0.0012-0.0035 in. (0.030-0.090 mm)
       
      Maximum side clearance: 0.0059 in. (0.15 mm)

      Click image to see an enlarged view

      Fig. Inspect rotor side clearance

       

    2.  

  8.  
  9. Inspect rotor tip clearance:
    1. Using a feeler gauge, measure the clearance between the drive and driven rotors. If the tip clearance is greater than maximum, replace the rotors as a set.

      Standard tip clearance: 0.0043-0.0094 in. (0.110-0.240 mm)
       
      Maximum tip clearance: 0.0138 in. (0.35 mm)

      Click image to see an enlarged view

      Fig. Inspect rotor tip clearance

       

    2.  

  10.  

Removal & Installation



Specific to:

Lexus ES300 1992-1996

  1. Disconnect the negative battery cable from the battery.
  2.  
  3. Remove the hood assembly.
  4.  
  5. Drain the coolant.
  6.  
  7. Drain the engine oil.

    Click image to see an enlarged view

    Fig. Oil pump and related components-1992-93 models



    Click image to see an enlarged view

    Fig. Oil pump and related components-1996 models, other models similar

  8.  
  9. Remove the front exhaust pipe.
  10.  
  11. Remove the stiffener plate.
  12.  
  13. Remove the oil pan. Refer to Oil Pan Removal & Installation.
  14.  
  15. Remove the three nuts, oil strainer and gasket.

    Click image to see an enlarged view

    Fig. Remove the oil strainer

  16.  
  17. Remove the four bolts, nut and oil pan baffle plate.

    Click image to see an enlarged view

    Fig. Remove the oil pan baffle plate

  18.  
  19. Remove the washer tank:
    1. Remove the three washer tank mounting bolts.
    2.  
    3. Disconnect the connector and hose, and remove the washer tank.
    4.  

  20.  
  21. Remove the alternator.
  22.  
  23. Disconnect the radiator lower hose.
  24.  
  25. Remove the A/C compressor without disconnecting the hoses. Suspend the compressor aside.
  26.  
  27. Remove the bolt and water inlet pipe.
  28.  
  29. Remove the two bolts and alternator bracket.
  30.  
  31. Remove the three bolts and A/C compressor bracket.
  32.  
  33. Suspend the engine with an engine sling device.
  34.  
  35. Remove the timing belt.
  36.  
  37. Remove the No. 1 idler pulley. Using a 10 mm hexagon wrench, remove the bolt, idler pulley and plate washer.
  38.  
  39. Remove the crankshaft timing pulley. If the pulley cannot be removed by hand, use two screwdrivers.
  40.  
  41. Remove the oil pump:
    1. Remove the nine bolts.
    2.  
    3. Remove the oil pump by prying a screwdriver between the oil pump and main bearing cap.
    4.  
    5. Remove the O-ring.

      Click image to see an enlarged view

      Fig. Remove the oil pump

    6.  

  42.  

To install:

  1. Remove any old packing or sealer from the mounting surfaces. Clean all the sealing surfaces.
    WARNING
    Do not use a solvent which will affect the painted surfaces.

  2.  
  3. Apply sealant to the oil pump.
  4.  
  5. Install a nozzle that has been cut to a 0.08-0.12 in. (2-3mm) opening.
    NOTE
    Avoid applying an excessive amount to the surface. Parts must be assembled within 5 minutes of application. Otherwise the material must be removed and reapplied. Immediately remove nozzle from the tube and reinstall cap.

  6.  
  7. Place a new O-ring in position on the cylinder block.

    Click image to see an enlarged view

    Fig. Place a new O-ring in position on the cylinder block

  8.  
  9. Engage the spline teeth of the oil pump drive gear with the large teeth of the crankshaft, and slide.

    Click image to see an enlarged view

    Fig. Engage the spline teeth of the oil pump drive gear with the large teeth of the crankshaft

  10.  
  11. Install the oil pump with the nine bolts. Tighten the bolts:
    NOTE
    On vehicles with A/C, tighten bolt A together with the A/C bracket.



    12mm head bolt: 14 ft. lbs. (20 Nm)
     
    14mm head bolt: 30 ft. lbs. (41 Nm)

    Click image to see an enlarged view

    Fig. Oil pump and 12mm head bolts (C, D) and 14mm head bolt (A, B)

     

  12.  
  13. Install the crankshaft timing pulley:
    1. Align the pulley set key with the key groove of the timing pulley.
    2.  
    3. Slide on the timing pulley, facing the flange side inward.
    4.  

  14.  
  15. Install No. 1 idler pulley:
    1. Apply adhesive to two or three threads of the mount bolt end.
    2.  
    3. Using a 10 mm hexagon wrench, install the idler pulley with the plate washer and bolt. Tighten the bolt to 25 ft. lbs. (34 Nm)
    4.  
    5. Check that the pulley bracket moves smoothly.
    6.  

  16.  
  17. Install timing belt
  18.  
  19. Remove engine sling device from engine
  20.  
  21. Install the A/C compressor bracket with the three bolts.
  22.  
  23. Install the alternator bracket with the two bolts.
  24.  
  25. Install a new O-ring and water inlet pipe.
  26.  
  27. Install the A/C compressor and connect the connector.
  28.  
  29. Connect the radiator lower hose.
  30.  
  31. Install the alternator.
  32.  
  33. Connect the connector and vinyl hose to the washer tank and install the washer tank with the three bolts.
  34.  
  35. Install the oil pan baffle plate with the four bolts and nut and tighten to 65 inch lbs. (6 Nm).
  36.  
  37. Install a new gasket and the oil strainer with the three nuts and tighten to 65 inch lbs. (6 Nm).
  38.  
  39. Install the oil pan.
  40.  
  41. Install the stiffener plate.
  42.  
  43. Install the front exhaust pipe.
  44.  
  45. Refill the fluids.
  46.  
  47. Connect the negative battery cable.
  48.  
  49. Start engine and check for leaks.
  50.  
  51. Recheck engine coolant and engine oil levels.
  52.  
  53. Install the hood.
  54.  

Specific to:

Lexus ES300 1997-1999

  1. Disconnect the negative battery cable from the battery.
  2.  
  3. Raise and safely support the front of the vehicle.
  4.  
  5. Remove the right front wheel.
  6.  
  7. Remove the fender apron seal.
  8.  
  9. Remove the engine undercover.
  10.  
  11. Drain the engine oil from the engine.
  12.  
  13. Remove the front exhaust pipe.
  14.  
  15. Remove the front exhaust pipe bracket from the No. 1 oil pan.
  16.  
  17. Remove the alternator drive belt from the engine.
  18.  
  19. Remove the A/C compressor from the engine.
  20.  
  21. Remove the power steering pump drive belt and adjusting strut.
  22.  
  23. Remove the timing belt from the engine.
  24.  
  25. Remove the timing belt pulleys.
  26.  
  27. Remove the rear timing belt cover from the engine by removing the wire clamps and six bolts.
  28.  
  29. Remove the A/C compressor housing bracket.
  30.  
  31. Remove the No. 2 oil pan. Refer to Oil Pan Removal & Installation.
  32.  
  33. Remove the oil strainer and gasket from the engine.

    Click image to see an enlarged view

    Fig. Remove the oil strainer

  34.  
  35. Remove the No. 1 oil pan. Refer to Oil Pan Removal & Installation.
  36.  
  37. Remove the baffle plate from the No. 1 oil pan.
  38.  
  39. Remove the crankshaft position sensor by removing the connector and bolt.
  40.  
  41. Remove the oil pump as follows:
    1. Remove the nine bolts. Make a note of the position of the each bolt. When replacing the bolts into the oil pump body, place each bolt in the position from which it was removed.
    2.  
    3. Remove the oil pump body by prying between the oil pump and main bearing cap.
    4.  
    5. Remove the O-ring from the cylinder block.

      Click image to see an enlarged view

      Fig. Remove the oil pump

    6.  
    7. Remove the plug, gasket, spring and relief valve from the oil pump body.
    8.  
    9. Remove the nine screws, pump body cover, drive and driven rotors.
    10.  

  42.  

To install:

  1. To install the oil pump:
    1. Install the driven rotors, drive, pump body cover and then install the nine screws.
    2.  
    3. Install the oil pump relief valve, spring, gasket and the plug to the oil pump body.
    4.  
    5. Place a new O-ring on the cylinder block.

      Click image to see an enlarged view

      Fig. Place a new O-ring on the cylinder block

    6.  
    7. Using a non residue solvent, clean both sealing surfaces to the oil pump.
    8.  

  2.  
  3. Install the RTV sealant to the oil pump as shown.

    Click image to see an enlarged view

    Fig. Apply sealant to the mounting surface of the oil pump in the areas shown

    1. Install the oil pump to the engine block. Make sure to engage the spline teeth of the oil pump drive gear with the large teeth of the crankshaft.

      Click image to see an enlarged view

      Fig. Engage the spline teeth of the oil pump drive gear with the large teeth of the crankshaft

    2.  
    3. Install the nine bolts to the oil pump and uniformly tighten the bolts in several passes. Torque the bolts as follows:

      10mm head bolts: 69 inch lbs. (8 Nm)
       
      12mm head bolts: 14 ft. lbs. (20 Nm)
       

    4.  

  4.  
  5. Install the crankshaft position sensor and install the bolt. Torque the bolt to 69 inch lbs. (8 Nm).
  6.  
  7. Install the baffle plate to the No. 1 oil pan and torque to 69 inch lbs. (8 Nm).
  8.  
  9. Install the No. 1 oil pan.
  10.  
  11. Install the flywheel housing undercover with the two bolts. Torque the bolts to 69 inch lbs. (8 Nm).
  12.  
  13. Install the oil strainer with the three nuts. Torque the nuts to 69 inch lbs. (8 Nm).
  14.  
  15. Install the No. 2 oil pan.
  16.  
  17. Install the oil level sensor.
  18.  
  19. Install the A/C compressor housing bracket.
  20.  
  21. Install the rear timing belt cover.
  22.  
  23. Install the timing belt pulleys.
  24.  
  25. Install the timing belt.
  26.  
  27. Install the power steering pump drive belt and adjusting strut.
  28.  
  29. Install the A/C compressor.
  30.  
  31. Install the alternator drive belt.
  32.  
  33. Install the front exhaust pipe bracket to the No. 1 oil pan.
  34.  
  35. Install the front exhaust pipe.
  36.  
  37. Install the fender apron seal.
  38.  
  39. Install the right front wheel.
  40.  
  41. Fill the engine with oil.
  42.  
  43. Connect the negative battery cable to the battery.
  44.  
  45. Start the engine and check for leaks.
  46.  
  47. Recheck the engine oil.
  48.  

 
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