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HOMESERVICE MANUALSTOYOTA2004CELICA GT, STANDARDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 248 (ENGINE LUBRICATION SYSTEM)OIL PUMPINSPECTION
2004 Toyota Celica GT, Standard

Oil Pump: Inspection

2004 Toyota Celica GT, StandardSECTION Inspection
WARNING: This page is about a different car, the 2002 Toyota Celica. However, it is still accessible from the selected car via links, so may be relevant.
  1. Inspect oil jet  :

    Check the oil jet for damage or clogging.

    Fig 1: Air Testing Oil Jet
    G01055586Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    If necessary, replace the oil pump assembly.

  2. Inspect relief valve  :

    Coat the valve with engine oil and check that it falls smoothly into the valve hole by its own weight.

    Fig 2: Inspecting Oil Pump Relief Valve
    G01055587Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    If it does not, replace the relief valve. If necessary, replace the oil pump assembly.

  3. Inspect rotor side clearance  :

    Using a feeler gauge and precision straight edge, measure the clearance between the rotors and precision straight edge.

    Fig 3: Measuring Rotor Side Clearance
    G01055588Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    Standard side clearance: 

    0.030 - 0.080 mm (0.0012 - 0.0031 in.) 

    Maximum side clearance: 

    0.16 mm (0.0062 in.) 

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

  4. Inspect rotor tip clearance  :

    Using a feeler gauge, measure the clearance between the drive and driven rotor tips.

    Fig 4: Measuring Drive To Driven Rotor Tip Clearance
    G01055589Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    Standard tip clearance: 

    0.060 - 0.180 mm (0.0024 - 0.0071 in.) 

    Maximum tip clearance: 

    0.35 mm (0.0138 in.) 

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

  5. Inspect rotor body clearance  :

    Using a feeler gauge, measure the clearance between the driven rotor and body.

    Fig 5: Measuring Driven Rotor To Body Clearance
    G01055590Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    Standard body clearance: 

    0.125 - 0.180 mm (0.00492 - 0.00709 in.) 

    Maximum body clearance: 

    0.325 mm (0.01280 in.) 

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

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