OIL PUMP INSPECTION

PROCEDURE


  1. INSPECT OIL PUMP RELIEF VALVE


    1. B004OPW

      Coat the oil pump relief valve with engine oil, then check that it falls smoothly into the valve hole by its own weight.

      Tech Tips

      If the oil pump relief valve does not fall smoothly, replace the oil pump assembly.

  2. INSPECT OIL PUMP ROTOR


    1. Check the side clearance.


      1. B004OWH

        Using a feeler gauge and precision straightedge, measure the clearance between the oil pump drive rotor, oil pump driven rotor and precision straightedge.

        Standard Side Clearance
        Maximum Side Clearance Specified Condition
        0.16 mm 0.030 to 0.070 mm
        0.00630 in. 0.030 to 0.070 mm

        Tech Tips

        If the side clearance is greater than the maximum, replace the oil pump assembly.

    2. Check the tip clearance.


      1. B004QHX

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

        Standard Tip Clearance
        Maximum Tip Clearance Specified Condition
        0.35 mm 0.04 to 0.16 mm
        0.0138 in. 0.00157 to 0.00630 in.

        Tech Tips

        If the tip clearance is greater than the maximum, replace the oil pump assembly.

    3. Check the body clearance.


      1. B004Q2N

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

        Standard Body Clearance
        Maximum Tip Clearance Specified Condition
        0.325 mm 0.11 to 0.19 mm
        0.0128 in. 0.00433 to 0.00748 in.

        Tech Tips

        If the body clearance is greater than the maximum, replace the oil pump assembly.