CYLINDER HEAD REPLACEMENT

CAUTION / NOTICE / HINT

Tech Tips


  • Use the same procedure for bank 1 and bank 2.

  • The following procedure is for bank 2.

PROCEDURE


  1. REPLACE INTAKE VALVE GUIDE BUSH


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

    2. Place the cylinder head LH on wooden blocks.

      CAUTION:

      Be sure to wear protective gloves.

    3. A01RFPVC01
      *a Wooden Block

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

      SST
      09201-10000   ( 09201-01050 )
      09950-70010   ( 09951-07100 )
    4. A01RAVA

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

      Standard Intake Valve Guide Bush Bore Diameter
      10.285 to 10.306 mm (0.405 to 0.406 in.)
      New Guide Bush Selection Chart
      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.)

      Tech Tips


      • If the intake valve guide bush bore diameter is more than 10.306 mm (0.406 in.), machine the intake valve guide bush bore 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 LH is more than 10.356 mm (0.40772 in.), replace the cylinder head LH.

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

    6. Place the cylinder head LH on wooden blocks.

      CAUTION:

      Be sure to wear protective gloves.

    7. A01R924C01
      *a Protrusion Height
      *b Wooden Block

      Using SST and a hammer, tap in a new intake valve guide bush 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. A01RFD4

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

    2. Place the cylinder head LH on wooden blocks.

      CAUTION:

      Be sure to wear protective gloves.

    3. A01RCL1C01
      *a Wooden Block

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

      SST
      09201-10000   ( 09201-01050 )
      09950-70010   ( 09951-07100 )
    4. A01RFRD

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

      Standard Exhaust Valve Guide Bush Bore Diameter
      10.285 to 10.306 mm (0.405 to 0.406 in.)
      New Guide Bush Selection Chart
      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.)

      Tech Tips


      • If the exhaust valve guide bush bore diameter is more than 10.306 mm (0.406 in.), machine the exhaust valve guide bush bore 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 LH is more than 10.356 mm (0.40772 in.), replace the cylinder head LH.

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

    6. Place the cylinder head LH on wooden blocks.

      CAUTION:

      Be sure to wear protective gloves.

    7. A01R9PQC01
      *a Protrusion Height
      *b Wooden Block

      Using SST and a hammer, tap in a new exhaust valve guide bush 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. A01R90R

      Using a sharp 5.5 mm reamer, ream the exhaust valve guide bush to obtain the specified 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. A01REU8C01
      *a Protrusion Height

      Using a plastic hammer, tap in new ring pins to the cylinder head LH.

      Standard 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 its threads are damaged, replace it.


    1. Using E6 and E8 "TORX" socket wrenches, install the stud bolts to the cylinder head LH.

      A01RE4NC01
      *a Intake Side *b Exhaust Side
      *c Rear Side *d 20 mm (0.787 in.)
      *e 13 mm (0.512 in.) *f 35 mm (1.38 in.)
      *g 16 mm (0.630 in.) *h 9 mm (0.354 in.)
      *i 27 mm (1.06 in.) *j 26 mm (1.02 in.)
      *k 16.7 mm (0.657 in.) *l 51.7 mm (2.04 in.)
      Torque:
      Bolt (A), (B)
      10 N*m  { 102 kgf*cm, 7 ft.*lbf }
      Bolt (C)
      4.0 N*m  { 41 kgf*cm, 35 in.*lbf }

  5. REPLACE STRAIGHT PIN

    Note

    If a straight pin is deformed, replace it.


    1. A01R9RDC01
      *a 34 mm (1.34 in.)
      *b Protrusion Height

      Using a plastic hammer, tap in new straight pins to the cylinder head LH as shown in the illustration.

      Standard Protrusion Height
      17.5 to 19.5 mm (0.689 to 0.768 in.)