CYLINDER HEAD REPLACEMENT

PROCEDURE


  1. REPLACE INTAKE VALVE GUIDE BUSH


    1. Heat the cylinder head sub-assembly to approximately 80 to 100°C (176 to 212°F).

    2. Place the cylinder head sub-assembly on wooden blocks.

    3. A01W0SNE09

      Using SST and a hammer, tap out the intake valve guide bush.

      SST
      09201-01055
      09950-70010   ( 09951-07100 )
    4. A01W0XL

      Using a caliper gauge, measure the intake valve guide bush bore diameter of the cylinder head sub-assembly.

      Standard Intake Valve Guide Bush Bore Diameter
      10.285 to 10.306 mm (0.405 to 0.406 in.)
      Select a new intake valve guide bush (STD or O/S 0.05)
      Bush Size Bush Bore Diameter
      STD

      10.333 to 10.344 mm

      (0.40681 to 0.40724 in.)
      O/S 0.05

      10.383 to 10.394 mm

      (0.40878 to 0.40921 in.)
      Standard Bush Length
      41.3 to 41.7 mm (1.63 to 1.64 in.)

      If the intake valve guide bush bore diameter of the cylinder head sub-assembly is more than 10.306 mm (0.406 in.), machine the intake valve guide bush bore of the cylinder head sub-assembly to a dimension of 10.335 to 10.356 mm (0.407 to 0.408 in.) to install an O/S 0.05 intake valve guide bush.

      If the intake valve guide bush bore diameter of the cylinder head sub-assembly is more than 10.356 mm (0.408 in.), replace the cylinder head sub-assembly.

    5. Heat the cylinder head sub-assembly to approximately 80 to 100°C (176 to 212°F).

    6. A01W1W2E02
      Text in Illustration
      *a Protrusion Height

      Using SST and a hammer, tap in the selected intake valve guide bush.

      SST
      09201-10000   ( 09201-01050 )
      09950-70010   ( 09951-07100 )
      Standard Protrusion Height
      14.85 to 15.1 mm (0.585 to 0.594 in.)
    7. A01W3GU

      Using a sharp 5.5 mm reamer, ream the intake valve guide bush to obtain the standard oil clearance.

      Standard Oil Clearance
      0.025 to 0.060 mm (0.000984 to 0.00236 in.)

  2. REPLACE EXHAUST VALVE GUIDE BUSH


    1. Heat the cylinder head sub-assembly to approximately 80 to 100°C (176 to 212°F).

    2. Place the cylinder head sub-assembly on wooden blocks.

    3. A01W2SXE02

      Using SST and a hammer, tap out the exhaust valve guide bush.

      SST
      09201-01055
      09950-70010   ( 09951-07100 )

    4. Using a caliper gauge, measure the exhaust valve guide bush bore diameter of the cylinder head sub-assembly.

      Standard Exhaust Valve Guide Bush Bore Diameter
      10.285 to 10.306 mm (0.405 to 0.406 in.)
      Select a new exhaust valve guide bush (STD or O/S 0.05)
      Bush Size Bush Bore Diameter
      STD

      10.333 to 10.344 mm

      (0.40681 to 0.40724 in.)
      O/S 0.05

      10.383 to 10.394 mm

      (0.40878 to 0.40921 in.)
      Standard Bush Length
      46.8 to 47.2 mm (1.84 to 1.86 in.)

      If the exhaust valve guide bush bore diameter of the cylinder head sub-assembly is more than 10.306 mm (0.406 in.), machine the exhaust valve guide bush bore of the cylinder head sub-assembly to a dimension of 10.335 to 10.356 mm (0.407 to 0.408 in.) to install an O/S 0.05 exhaust valve guide bush.

      If the exhaust valve guide bush bore diameter of the cylinder head sub-assembly is more than 10.356 mm (0.408 in.), replace the cylinder head sub-assembly.

    5. Heat the cylinder head sub-assembly to approximately 80 to 100°C (176 to 212°F).

    6. A01W3ZZE02
      Text in Illustration
      *a Protrusion Height

      Using SST and a hammer, tap in the selected exhaust valve guide bush.

      SST
      09201-10000   ( 09201-01050 )
      09950-70010   ( 09951-07100 )
      Standard Protrusion Height
      14.25 to 14.5 mm (0.561 to 0.571 in.)
    7. A01W20L

      Using a sharp 5.5 mm reamer, ream the exhaust valve guide bush to obtain the standard oil clearance.

      Standard Oil Clearance
      0.030 to 0.065 mm (0.00118 to 0.00256 in.)

  3. REPLACE RING PIN

    Note

    It is not necessary to remove the ring pins unless they are being replaced.


    1. Remove the 2 ring pins.

    2. A01W09EE01
      Text in Illustration
      *a Protrusion Height

      Using a plastic hammer, tap in 2 new ring pins to the cylinder head sub-assembly.

      Standard Protrusion Height
      6.5 to 7.5 mm (0.256 to 0.295 in.)