OIL PUMP INSPECTION


  1. INSPECT OIL PUMP ASSEMBLY


    1. A01CIRD

      Using a dial indicator, measure the backlash between the oil pump gear and No. 1 idle gear sub-assembly.

      Standard backlash
      0.065 to 0.215 mm (0.0026 to 0.0085 in.)
      Maximum backlash
      0.30 mm (0.0118 in.)

      If the backlash is greater than the maximum, replace the oil pump assembly and No. 1 idle gear sub-assembly.

    2. A01CJCU

      Using vernier calipers, measure the width of the drive gear.

      Standard width
      27.02 to 27.04 mm (1.0638 to 1.0646 in.)
    3. A01CHX3

      Using vernier calipers, measure the depth of the pump chamber on the cylinder block.

      Standard depth
      27.03 to 27.07 mm (1.0642 to 1.0657 in.)

    4. Calculate the difference between the width of the drive gear and the depth of the pump chamber on the cylinder block. (Gasket thickness: 0.06 to 0.08 mm)

      Standard clearance
      0.05 to 0.13 mm (0.002 to 0.0051 in.)
      Maximum clearance
      0.17 mm (0.0067 in.)

      Tech Tips

      If the difference exceeds the maximum, replace the oil pump assembly or cylinder block.

    5. Inspect the backlash between the drive gear and driven gear.


      1. Using a vise, secure the oil pump assembly.

      2. A01CJDD

        Using a dial gauge, measure the backlash between the drive gear and driven gear.

        Standard backlash
        0.091 to 0.217 mm (0.0036 to 0.0085 in.)
        Maximum backlash
        0.25 mm (0.0098 in.)

    6. Inspect the clearance between the drive gear shaft and drive gear bush.


      1. A01CGPG

        Using a micrometer, measure the diameter of the drive gear shaft.

        Standard shaft diameter
        18.088 to 18.106 mm (0.7121 to 0.7128 in.)
    7. A01CJ3R

      Using a dial gauge, measure the inside diameter of the drive gear bush.

      Standard bush inside diameter
      18.146 to 18.173 mm (0.7144 to 0.7155 in.)
      Maximum bush inside diameter
      18.20 mm (0.7165 in.)

    8. Subtract the diameter measurement of the drive gear shaft from the inside diameter measurement of the drive gear bush.

      Standard clearance
      0.040 to 0.085 mm (0.0016 to 0.0033 in.)
      Maximum clearance
      0.10 mm (0.0039 in.)

      If the clearance is greater than the maximum, replace the oil pump assembly or drive gear bush.

    9. A01CHPL

      Inspect the clearance between the driven gear shaft and driven gear bush.


      1. Using a micrometer, measure the diameter of the driven gear shaft.

        Standard shaft diameter
        17.979 to 17.997 mm (0.7078 to 0.7085 in.)
    10. A01CIJE

      Using a dial gauge, measure the inside diameter of the driven gear bush.

      Standard bush inside diameter
      18.037 to 18.054 mm (0.7101 to 0.7108 in.)

    11. Subtract the diameter measurement of the driven gear shaft from the inside diameter measurement of the driven gear bush.

      Standard clearance
      0.040 mm to 0.075 mm (0.0016 to 0.0030 in.)
      Maximum clearance
      0.13 mm (0.0051 in.)

      If the clearance is greater than the maximum, replace the driven gear shaft or the driven gear.