OIL PUMP INSPECTION

PROCEDURE

  1. INSPECT OIL PUMP RELIEF VALVE

    1. A353074

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

      Tip:

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

  2. INSPECT OIL PUMP ASSEMBLY

    1. Check the side clearance.

      1. A353075

        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

        0.03 to 0.07 mm (0.00118 to 0.00276 in.)

        Maximum Side Clearance

        0.07 mm (0.00276 in.)

        Tip:

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

    2. Check the tip clearance.

      1. A353076

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

        Standard Tip Clearance

        0.06 to 0.18 mm (0.00236 to 0.00709 in.)

        Maximum Tip Clearance

        0.18 mm (0.00709 in.)

        Tip:

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

    3. Check the body clearance.

      1. A353077

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

        Standard Body Clearance

        0.10 to 0.18 mm (0.00394 to 0.00709 in.)

        Maximum Body Clearance

        0.18 mm (0.00709 in.)

        Tip:

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