CYLINDER HEAD REPLACEMENT

PROCEDURE


  1. REPLACE INTAKE VALVE GUIDE BUSH


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

    2. Place the cylinder head on wooden blocks.

      CAUTION:

      Be sure to wear protective gloves.

    3. B003U7PN01

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

      SST
      09201-10000   ( 09201-01050 )
      09950-70010   ( 09951-07100 )

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

      Standard valve guide bush bore diameter
      10.285 to 10.306 mm (0.4049 to 0.4057 in.)
      Select a New Guide Bush (STD or O/S 0.05)
      Bush Size Specified Condition
      STD

      10.285 to 10.306 mm

      (0.4049 to 0.4057 in.)
      O/S 0.05

      10.335 to 10.356 mm

      (0.4069 to 0.4077 in.)

      If the intake valve guide bush bore diameter of the cylinder head is more than 10.306 mm (0.4057 in.), machine the bush bore to the dimension of 10.335 to 10.356 mm (0.4069 to 0.4077 in.) to install an O/S 0.05 intake valve guide bush.

      If the intake valve guide bush bore diameter of the cylinder head is more than 10.356 mm (0.4077 in.), replace the cylinder head.

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

    6. Place the cylinder head on wooden blocks.

      CAUTION:

      Be sure to wear protective gloves.

    7. B003TYVC02
      *a Protrusion Height

      Using SST, tap in new intake valve guide bushes to the specified protrusion height.

      SST
      09201-10000   ( 09201-01050 )
      09950-70010   ( 09951-07100 )
      Standard protrusion height
      10.2 to 10.6 mm (0.402 to 0.417 in.)
    8. B003WEY

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

      Standard oil clearance
      0.030 to 0.060 mm (0.00118 to 0.00236 in.)

  2. REPLACE EXHAUST VALVE GUIDE BUSH


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

    2. Place the cylinder head on wooden blocks.

      CAUTION:

      Be sure to wear protective gloves.

    3. B003U25N01

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

      SST
      09201-10000   ( 09201-01050 )
      09950-70010   ( 09951-07100 )

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

      Standard valve guide bush bore diameter
      10.285 to 10.306 mm (0.4049 to 0.4057 in.)
      Select a New Guide Bush (STD or O/S 0.05)
      Bush Size Specified Condition
      STD

      10.285 to 10.306 mm

      (0.4049 to 0.4057 in.)
      O/S 0.05

      10.335 to 10.356 mm

      (0.4069 to 0.4077 in.)

      If the exhaust valve guide bush bore diameter of the cylinder head is more than 10.306 mm (0.4057 in.), machine the bush bore to the dimension of 10.335 to 10.356 mm (0.4069 to 0.4077 in.) to install an O/S 0.05 exhaust valve guide bush.

      If the exhaust valve guide bush bore diameter of the cylinder head is more than 10.356 mm (0.4077 in.), replace the cylinder head.

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

    6. Place the cylinder head on wooden blocks.

      CAUTION:

      Be sure to wear protective gloves.

    7. B003UOJC02
      *1 Protrusion Height

      Using SST, tap in new exhaust valve guide bushes to the specified protrusion height.

      SST
      09201-10000   ( 09201-01050 )
      09950-70010   ( 09951-07100 )
      Standard protrusion height
      9.30 to 9.70 mm (0.366 to 0.382 in.)
    8. B003VCS

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

      Standard oil clearance
      0.025 to 0.065 mm (0.000984 to 0.00256 in.)

  3. REPLACE RING PIN

    Tech Tips

    It is not necessary to remove the ring pin unless it is being replaced.


    1. B003VR1C02
      *a for Bank 1
      *b for Bank 2
      *c Protrusion Height

      Using a plastic-faced hammer, tap in new ring pins to the specified protrusion height.

      Standard protrusion height
      2.5 to 3.8 mm (0.0984 to 0.150 in.)

  4. REPLACE STRAIGHT PIN

    Note

    It is not necessary to remove the straight pin unless it is being replaced.


    1. Using a plastic-faced hammer, tap in new straight pins as shown in the illustration.

      B003UUEC02
      *1 Protrusion Height - -
      *a for Bank 1 *b for Bank 2
      *c 34.0 mm (1.34 in) - -
      Standard protrusion height
      17.5 to 19.5 mm (0.689 to 0.768 in.)