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Toyota Supra JZA80

Oil pump inspection

  1. Inspect relief valve Coat the valve with engine oil and check that it falls smoothly into the valve hole under its own weight.
    If it doesn’t, replace the relief valve. If necessary, replace the oil pump assembly.
  2. Place drive and driven rotors into oil pump body
    1. Place drive and driven rotors into oil pump body
    Place the drive and driven rotors into the oil pump body with the mark facing upward.
  3. Inspect rotor tip clearance Using a feeler gauge, measure the clearance between the drive and driven rotors.
    Standard tip clearance:
    2JZ-GE: 0.060 - 0.240 mm (0.0024 - 0.0094 in.)
    2JZ-GTE: 0.056 - 0.326 mm (0.0022 - 0.0128 in.)
    Maximum tip clearance:
    2JZ-GE: 0.30 mm (0.0118 in.)
    2JZ-GTE: 0.40 mm (0.0157 in.)

    If the tip clearance is greater than maximum, replace the rotors as a set.
  4. Inspect rotor body clearance Using a feeler gauge, measure the clearance between the driven rotor and pump body.
    Standard body clearance:
    2JZ-GE: 0.100 - 0.175 mm (0.0039 - 0.0069 in.)
    2JZ-GTE: 0.080 - 0.135 mm (0.0031 - 0.0053 in.)
    Maximum body clearance:
    2JZ-GE: 0.20 mm (0.0079 in.)
    2JZ-GTE: 0.16 mm (0.0063 in.)

    If the body clearance is greater than maximum, replace the rotors as a set. If necessary, replace the oil pump assembly.
  5. Inspect rotor side clearance Using a feeler gauge and precision straight edge, measure the clearance between the rotors and precision straight edge.
    Standard side clearance:
    2JZ-GE: 0.030 - 0.090 mm (0.0012 - 0.0035 in.)
    2JZ-GTE: 0.020 - 0.065 mm (0.0007 - 0.0026 in.)
    Maximum side clearance:
    2JZ-GE: 0.12 mm (0.0047 in.)
    2JZ-GTE: 0.10 mm (0.0039 in.)

    If the side clearance is greater than maximum, replace the rotors as a set. If necessary, replace the oil pump assembly.
  6. Remove drive and driven rotors
This guide is based on the book edition Toyota (RM502U, 1997)

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