CYLINDER HEAD REPLACEMENT

PROCEDURE


  1. REPLACE INTAKE VALVE GUIDE BUSH


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

    2. Place the cylinder head sub-assembly on a wooden block.

    3. A00YSM7C02

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

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

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

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

      If the intake 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. Select a new intake valve guide bush (STD or O/S 0.05).

      Intake Valve Guide Bush
      Bush Size Specified Condition
      Use STD 10.985 to 11.006 mm (0.432 to 0.433 in.)
      Use O/S 0.05 11.035 to 11.056 mm (0.434 to 0.435 in.)

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

    7. Place the cylinder head sub-assembly on a wooden block.

    8. A00YR18C01

      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)
      9.0 to 9.4 mm (0.354 to 0.370 in.)
    9. A00YV9EC02
      *a Sharp 6.0 mm Reamer

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

      Standard oil clearance
      0.025 to 0.060 mm (0.000984 to 0.00236 in.)

  2. REPLACE EXHAUST VALVE GUIDE BUSH


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

    2. Place the cylinder head sub-assembly on a wooden block.

    3. A00YT5YC02

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

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

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

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

      If the exhaust 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. Select a new exhaust valve guide bush (STD or O/S 0.05).

      Exahust Valve Guide Bush
      Bush Size Specified Condition
      Use STD 10.985 to 11.006 mm (0.432 to 0.433 in.)
      Use O/S 0.05 11.035 to 11.056 mm (0.434 to 0.435 in.)

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

    7. Place the cylinder head sub-assembly on a wooden block.

    8. A00YSA0C01

      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)
      9.0 to 9.4 mm (0.354 to 0.370 in.)
    9. A00YV9EC02
      *a Sharp 6.0 mm Reamer

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

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

  3. REPLACE CYLINDER HEAD RING PIN

    Tech Tips

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


    1. Remove the cylinder head ring pin.

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

      Standard Protrusion
      Item Specified Condition
      Pin A 3.9 to 5.5 mm (0.154 to 0.217 in.)
      Pin B 2.5 to 3.5 mm (0.0984 to 0.138 in.)
      A00YXFKC01
      *a Intake Manifold Side *b Cylinder Head Cover Side
      *c Protrusion Height - -