CYLINDER HEAD REPLACEMENT

PROCEDURE


  1. REPLACE INTAKE VALVE GUIDE BUSH


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

    2. A01LDI7N04

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

      SST
      09201-10000   ( 09201-01060 )
      09950-70010   ( 09951-07100 )

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

    4. Select a new intake valve guide bush.

      New Guide Bush
      Item Specified Condition
      Bush bore diameter 10.985 to 11.006 mm (0.432 to 0.433 in.) 11.035 to 11.056 mm (0.434 to 0.435 in.)
      Bush to be used STD O/S 0.05

      If the valve guide bush bore diameter of the cylinder head sub-assembly is more than 11.006 mm (0.433 in.), machine the valve guide bush bore diameter to between 11.035 and 11.056 mm (0.434 and 0.435 in.).

      If the valve guide bush bore diameter of the cylinder head sub-assembly is more than 11.056 mm (0.435 in.), replace the cylinder head sub-assembly.

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

    6. A01LCJQN02

      Using SST and a hammer, tap in a new intake valve guide bush to the specified protrusion height.

      SST
      09201-10000   ( 09201-01060 )
      09950-70010   ( 09951-07100 )
      Standard protrusion height (H)
      10.3 to 10.7 mm (0.406 to 0.421 in.)
    7. A01L8FJC06
      *a Sharp 6.0 mm Reamer

      Using a sharp 6.0 mm reamer, ream the intake valve guide bush to obtain the standard clearance between the intake valve guide bush and valve stem.

      Standard clearance
      0.025 to 0.060 mm (0.00984 to 0.00236 in.)

  2. REPLACE EXHAUST VALVE GUIDE BUSH


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

    2. A01L910N04

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

      SST
      09201-10000   ( 09201-01060 )
      09950-70010   ( 09951-07100 )

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

    4. Select a new exhaust valve guide bush.

      New Guide Bush
      Item Specified Condition
      Bush bore diameter 10.985 to 11.006 mm (0.4325 to 0.4333 in.) 11.035 to 11.056 mm (0.4344 to 0.4353 in.)
      Bush to be used STD O/S 0.05

      If the valve guide bush bore diameter of the cylinder head sub-assembly is more than 11.006 mm (0.4333 in.), machine the valve guide bush bore diameter to between 11.035 and 11.056 mm (0.4344 and 0.4353 in.).

      If the valve guide bush bore diameter of the cylinder head sub-assembly is more than 11.056 mm (0.4353 in.), replace the cylinder head sub-assembly.

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

    6. A01L8MYN02

      Using SST and a hammer, tap in a new exhaust valve guide bush to the specified protrusion height.

      SST
      09201-10000   ( 09201-01060 )
      09950-70010   ( 09951-07100 )
      Standard protrusion height (H)
      10.3 to 10.7 mm (0.406 to 0.421 in.)
    7. A01L83YC06
      *a Sharp 6.0 mm Reamer

      Using a sharp 6.0 mm reamer, ream the exhaust valve guide bush to obtain the standard clearance between the exhaust valve guide bush and valve stem.

      Standard clearance
      0.035 to 0.070 mm (0.00138 to 0.00276 in.)

  3. REPLACE RING PIN

    Tech Tips

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


    1. Remove the ring pin from the cylinder head sub-assembly.

    2. Using a plastic-faced hammer, tap in a new ring pin to the cylinder head sub-assembly until the pin stops.

      Standard protrusion
      Less than 5 mm (0.197 in.)
      A01L9XNC07
      *a 8 mm (0.315 in.) *b 10 mm (0.394 in.)
      *c Less than 5 mm (0.197 in.) - -