OIL PUMP INSPECTION

PROCEDURE


  1. INSPECT OIL PUMP RELIEF VALVE


    1. A0028K0

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

      If the oil pump relief valve does not fall smoothly, replace the oil pump relief valve. If necessary, replace the timing chain cover sub-assembly.

  2. INSPECT OIL PUMP ROTOR SET


    1. Apply engine oil to the drive rotor and driven rotor.

    2. A00279MC09
      *a Rotor Mark

      Install the drive rotor and driven rotor to the timing chain cover sub-assembly with the rotor marks facing up. Check that the rotors rotate smoothly.

      If the rotors do not rotate smoothly, replace the timing chain cover sub-assembly.

    3. A002BXPC05
      *a Feeler Gauge

      Check the tip clearance.


      1. Using a feeler gauge, measure the clearance between the drive rotor and driven rotor tips as shown in the illustration.

        Standard Tip Clearance
        0.060 to 0.160 mm (0.00236 to 0.00630 in.)
        Maximum Tip Clearance
        0.160 mm (0.00630 in.)

        If the tip clearance is more than the maximum, replace the oil pump rotor set.

    4. A002C3QC05
      *a Precision Straightedge
      *b Feeler Gauge

      Check the side clearance.


      1. Using a feeler gauge and precision straightedge, measure the clearance between the drive rotor and driven rotor and precision straightedge as shown in the illustration.

        Standard Side Clearance
        0.030 to 0.090 mm (0.00118 to 0.00354 in.)
        Maximum Side Clearance
        0.090 mm (0.00354 in.)

        If the side clearance is more than the maximum, replace the oil pump rotor set. If necessary, replace the timing chain cover sub-assembly.

    5. A002BRMC05
      *a Feeler Gauge

      Check the body clearance.


      1. Using a feeler gauge, measure the clearance between the timing chain cover sub-assembly and driven rotor as shown in the illustration.

        Standard Body Clearance
        0.250 to 0.325 mm (0.00984 to 0.0128 in.)
        Maximum Body Clearance
        0.325 mm (0.0128 in.)

        If the body clearance is more than the maximum, replace the oil pump rotor set. If necessary, replace the timing chain cover sub-assembly.