CYLINDER HEAD REPLACEMENT

PROCEDURE


  1. REPLACE INTAKE VALVE GUIDE BUSH


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

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

    3. A01W3MXE03

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

      SST
      09201-10000   ( 09201-01050 )
      09950-70010   ( 09951-07100 )
    4. A01W1AP

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

      Cylinder 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 Bush Bore Diameter
      STD 10.333 to 10.344 mm (0.4068 to 0.4072 in.)
      O/S 0.05 10.383 to 10.394 mm (0.4088 to 0.4092 in.)

      If the bush bore diameter of the cylinder head sub-assembly is greater 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 valve guide bush.

      If the bush bore diameter of the cylinder head sub-assembly is greater than 10.356 mm (0.4077 in.), replace the cylinder head sub-assembly.

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

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

    7. A01VZDXE06
      Text in Illustration
      *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 )
      Protrusion height
      9.30 to 9.70 mm (0.3661 to 0.3819 in.)
    8. A01W2K3

      Using a sharp 5.5 mm reamer, ream the intake valve guide bushings to obtain the specified 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 80 to 100°C (176 to 212°F).

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

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

      SST
      09201-10000   ( 09201-01050 )
      09950-70010   ( 09951-07100 )
    4. A01W2MJ

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

      Cylinder 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 Bush Bore Diameter
      STD 10.333 to 10.344 mm (0.4068 to 0.4072 in.)
      O/S 0.05 10.383 to 10.394 mm (0.4088 to 0.4092 in.)

      If the bush bore diameter of the cylinder head sub-assembly is greater 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 valve guide bush.

      If the bush bore diameter of the cylinder head sub-assembly is greater than 10.356 mm (0.4077 in.), replace the cylinder head sub-assembly.

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

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

    7. A01W4WYE07
      Text in Illustration
      *a 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 )
      Protrusion height
      9.30 to 9.70 mm (0.3661 to 0.3819 in.)
    8. A01W19S

      Using a sharp 5.5 mm reamer, ream the exhaust valve guide bushings to obtain the specified 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 pin unless it is being replaced.


    1. A01W03SE08
      Text in Illustration
      *a for Bank 1
      *b for Bank 2

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

      Specified protrusion height
      2.5 to 3.5 mm (0.0984 to 0.138 in.)

  4. REPLACE STUD BOLT

    Note

    If a stud bolt is deformed or the threads are damaged, replace it.


    1. Using an E6 and E8 "TORX" socket wrench, install the stud bolts.

      A01W554E02
      Text in Illustration
      *a Bank 1 Rear Side *b Bank 1 Intake Side
      *c Bank 2 Intake Side *d Bank 1 Exhaust Side
      *e Bank 2 Exhaust Side *f Bank 2 Rear Side
      Torque:
      Bolt A
      10 N*m  { 102 kgf*cm, 7 ft.*lbf }
      Bolt B
      4.0 N*m  { 41 kgf*cm, 35 in.*lbf }

  5. REPLACE STRAIGHT PIN

    Note

    If a straight pin is deformed, replace it.


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

      A01W1LCE16
      Text in Illustration
      *a for Bank 1 *b for Bank 2
      Protrusion height
      17.5 to 19.5 mm (0.689 to 0.768 in.)