ENGINE UNIT INSPECTION


  1. INSPECT VALVE ROCKER ARM OIL CLEARANCE


    1. A01CH75

      Using a caliper gauge, measure the inside diameter of the rocker arm bush.

      Standard bush inside diameter
      22.023 to 22.052 mm (0.8670 to 0.8681 in.)
      Maximum bush inside diameter
      22.08 mm (0.8693 in.)

      If the inside diameter is greater than the maximum, replace the bush.

      Note

      When installing a bush into the rocker arm, align the bush correctly with the 2 oil holes of the rocker arm.

    2. A01CGOA

      Using a micrometer, measure the outside diameter of the rocker arm shaft.

      Standard shaft diameter
      21.959 to 21.980 mm (0.8645 to 0.8653 in.)
      Minimum shaft diameter
      21.92 mm (0.8630 in.)

      If the outside diameter is less than the minimum, replace the rocker arm shaft.

    3. Subtract the valve rocker arm inside diameter measurement from the valve rocker shaft outside diameter measurement.

      Standard oil clearance
      0.043 to 0.093 mm (0.00169 to 0.00366 in.)
      Maximum oil clearance
      0.15 mm (0.00591 in.)

      If the oil clearance is greater than the maximum, replace the rocker arm shaft and rocker arm bush.

  2. INSPECT VALVE PUSH ROD


    1. A01CHWP

      Place the push rod on V-blocks.

    2. Using a dial indicator, measure the circle runout at the center of the push rod.

      Maximum circle runout
      0.30 mm (0.0118 in.)

      If the circle runout is greater than the maximum, replace the push rod.

  3. INSPECT CYLINDER HEAD SET BOLT


    1. A01CGS1E05
      Text in Illustration
      *a Measurement Length

      Using a vernier caliper, measure the length of the cylinder head set bolt from the seat to the end.

      Maximum length
      129 mm (5.07 in.)

      If the length is more than the maximum, replace the cylinder head set bolt.

  4. INSPECT NO. 2 IDLE GEAR OIL CLEARANCE


    1. A01CI37

      Using a cylinder gauge, measure the inside diameter of the No. 2 idle gear.

      Standard idle gear inside diameter
      50.000 to 50.025 mm (1.9685 to 1.9695 in.)
      Maximum idle gear inside diameter
      50.05 mm (1.9704 in.)

      If the diameter is greater than the maximum, replace the No. 2 idle gear.

    2. A01CJEY

      Using a micrometer, measure the diameter of the No. 2 idle gear shaft.

      Standard shaft diameter
      49.950 to 49.975 mm (1.9665 to 1.9675 in.)
      Minimum idle gear shaft diameter
      49.95 mm (1.9665 in.)

      If the diameter is less than the minimum, replace the No. 2 idle gear shaft.

    3. Subtract the No. 2 idle gear inside diameter measurement from the No. 2 idle gear shaft diameter measurement.

      Standard oil clearance
      0.0125 to 0.0375 mm (0.000492 to 0.00148 in.)
      Maximum oil clearance
      0.10 mm (0.00394 in.)

      If the clearance is greater than the maximum, replace the No. 2 idle gear and No. 2 idle gear shaft.

  5. INSPECT NO. 1 IDLE GEAR OIL CLEARANCE


    1. A01CHPI

      Using a cylinder gauge, measure the inside diameter of the No. 1 idle gear.

      Standard idle gear inside diameter
      50.000 to 50.025 mm (1.9685 to 1.9695 in.)
      Maximum idle gear inside diameter
      50.05 mm (1.9704 in.)

      If the diameter is greater than the maximum, replace the No. 1 idle gear.

    2. A01CIS7

      Using a micrometer, measure the diameter of the No. 1 idle gear shaft.

      Standard idle gear shaft diameter
      49.950 to 49.975 mm (1.9665 to 1.9675 in.)
      Minimum idle gear shaft diameter
      49.95 mm (1.9665 in.)

      If the diameter is less than the minimum, replace the No. 1 idle gear shaft.

    3. Subtract the No. 1 idle gear inside diameter measurement from the No. 1 idle gear shaft outside diameter measurement.

      Standard oil clearance
      0.0125 to 0.0370 mm (0.000492 to 0.00146 in.)
      Maximum oil clearance
      0.10 mm (0.00394 in.)

      If the clearance is greater than the maximum, replace the No. 1 idle gear and No. 1 idle gear shaft.