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. B0076AMN07

      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 Intake Valve Guide Bush Bore Diameter
      10.285 to 10.306 mm (0.4049 to 0.4057 in.)
      Select a New Intake Valve 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.)

      Tech Tips


      • If the intake valve guide bush bore diameter is more than 10.306 mm (0.4057 in.), machine the bush bore to a 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 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. B00776KC02
      *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
      9.10 to 9.90 mm (0.358 to 0.390 in.)
    8. B0072UF

      Using a sharp 5.5 mm reamer, ream the intake valve guide bushes to obtain the specified 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. B0073ZAN01

      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 Exhaust Valve Guide Bush Bore Diameter
      10.285 to 10.306 mm (0.4049 to 0.4057 in.)
      Select a New Exhaust Valve 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.)

      Tech Tips


      • If the exhaust valve guide bush bore diameter is more than 10.306 mm (0.4057 in.), machine the bush bore to a 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 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. B0072XIC07
      *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 )
      Standard Protrusion Height
      9.10 to 9.90 mm (0.358 to 0.390 in.)
    8. B00752V

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

      Standard Oil Clearance
      0.025 to 0.065 mm (0.00098 to 0.00256 in.)

  3. REPLACE RING PIN

    Note

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


    1. B0075KFC03
      *a for Bank 1
      *b for Bank 2
      *c Protrusion Height

      Using a plastic 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 pins unless they are being replaced.


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

      B0074JUC03
      *a for Bank 1 *b for Bank 2
      *c 34 mm (1.34 in.) *d Protrusion Height
      Standard Protrusion Height
      18.5 mm (0.728 in.)