Lexus Car ES, IS, LS 1998-06

Oil Pump 1

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Inspection



Body Clearance


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Fig. Inspecting the oil pump rotor body clearance.

  1. Install the rotors to the oil pump body with the marks facing upward and matchmarks aligned. Check that the rotors revolves smoothly.
  2.  
  3. Using a feeler gauge, measure the body clearance between the driven rotor and pump body.
  4.  
  5. The body clearance measurements are as follows:


    1. 3.0L (1MZ-FE) engine

      Standard body clearance: 0.0050-0.0064 inch (0.125-0.162mm)
       
      Maximum body clearance: 0.0118 inch (0.30mm)
       

    2.  
    3. 3.3L (3MZ-FE) engine

      Standard body clearance: 0.0098-0.0128 inch (0.250-0.325mm)
       
      Maximum body clearance: 0.0118 inch (0.30mm)
       

    4.  
    5. 3.0L (2JZ-GE) engine

      Standard body clearance: 0.0039-0.0069 inch (0.100-0.175mm)
       
      Maximum body clearance: 0.0079 inch (0.20mm)
       

    6.  
    7. 4.0L (1UZ-FE) engine

      Standard body clearance: 0.0098-0.0127 inch (0.250-0.325mm)
       
      Maximum body clearance: 0.0127 inch (0.325mm)
       

    8.  
    9. 4.3L (3UZ-FE) engine

      Standard body clearance: 0.0098-0.0128 inch (0.250-0.325mm)
       
      Maximum body clearance: 0.325 inch (0.0128mm)
       

    10.  

  6.  
  7. If the body clearance is greater than maximum, replace the rotors as a set. If necessary, replace the oil pump assembly.
  8.  

Oil Pump Relief Valve


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Fig. Checking the oil pump relief valve.

  1. Inspect the oil pump relief valve as follows:


    1. Remove the plug, spring and relief valve.
    2.  
    3. Apply a light coat of engine oil.
    4.  
    5. 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.
    6.  

  2.  

Rotor Side Clearance


Click image to see an enlarged view

Fig. Inspecting the oil pump rotor side clearance.

  1. Install the rotors to the oil pump body with the marks facing upward and matchmarks aligned. Check that the rotors revolves smoothly.
  2.  
  3. Using a feeler gauge and precision straight edge, measure the rotor side clearance between the rotors and precision straight edge.
  4.  
  5. The rotor side clearance measurements are as follows:


    1. 3.0L (1MZ-FE) and 3.3L (3MZ-FE) engines

      Standard side clearance: 0.0012-0.0035 inch (0.03-0.09mm)
       
      Maximum side clearance: 0.0059 inch (0.15mm)
       

    2.  
    3. 3.0L (2JZ-GE) engine

      Standard side clearance: 0.0012-0.0035 inch (0.03-0.09mm)
       
      Maximum side clearance: 0.0047 inch (0.12mm)
       

    4.  
    5. 4.0L (1UZ-FE) and 4.3L (3UZ-FE) engines

      Standard side clearance: 0.0012-0.0035 inch (0.03-0.09mm)
       
      Maximum side clearance: 0.0035 inch (0.09mm)
       

    6.  

  6.  
  7. If the rotor side clearance is greater than maximum, replace the rotors as a set. If necessary, replace the oil pump assembly.
  8.  

Rotor Tip Clearance


Click image to see an enlarged view

Fig. Install the rotors to the oil pump body with the marks facing upward and matchmarks aligned.



Click image to see an enlarged view

Fig. Inspecting the oil pump rotor tip clearance.

  1. Install the rotors to the oil pump body with the marks facing upward and matchmarks aligned. Check that the rotors revolves smoothly.
  2.  
  3. Using a feeler gauge, measure the rotor tip clearance between the drive and driven rotor tips.
  4.  
  5. The rotor tip clearance measurements are as follows:


    1. 3.0L (1MZ-FE) engine

      Standard tip clearance: 0.0043-0.0094 inch (0.11-0.24mm)
       
      Maximum tip clearance: 0.0138 inch (0.35mm)
       

    2.  
    3. 3.3L (3MZ-FE) engine

      Standard tip clearance: 0.0024-0.0071 inch (0.06-0.18mm)
       
      Maximum tip clearance: 0.0138 inch (0.35mm)
       

    4.  
    5. 3.0L (2JZ-GE) engine

      Standard tip clearance: 0.0024-0.0094 inch (0.06-0.24mm)
       
      Maximum tip clearance: 0.0118 inch (0.30mm)
       

    6.  
    7. 4.0L (1UZ-FE) and 4.3L (3UZ-FE) engines

      Standard tip clearance: 0.0024-0.0071 inch (0.06-0.18mm)
       
      Maximum tip clearance: 0.0071 inch (0.18mm)
       

    8.  

  6.  
  7. If the tip clearance is greater than maximum, replace the rotors as a set.
  8.  

 
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