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.

   3. 

      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 cylinder bore diameter
      10.285 to 10.306 mm (0.404 to 0.405 in.)

      Select a New Guide Bush (STD or O/S 0.05)
      Bush Size Specified Condition STD 10.285 to 10.306 mm (0.404 to 0.405 in.) O/S 0.05 10.335 to 10.356 mm (0.406 to 0.407 in.)

      If the bush bore diameter of the cylinder head is more than 10.306 mm (0.405 in.), machine the bush bore to the dimension of 10.335 to 10.356 mm (0.406 to 0.407 in.) to install an O/S 0.05 valve guide bush.

      If the bush bore diameter of the cylinder head is more than 10.356 mm (0.407 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.

   7. 

      *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. 

      Using a sharp 5.5 mm reamer, ream the valve guide bushings to obtain the specified 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.

   3. 

      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 cylinder bore diameter
      10.285 to 10.306 mm (0.404 to 0.405 in.)

      Select a New Guide Bush (STD or O/S 0.05)
      Bush Size Specified Condition STD 10.285 to 10.306 mm (0.404 to 0.405 in.) O/S 0.05 10.335 to 10.356 mm (0.406 to 0.407 in.)

      If the bush bore diameter of the cylinder head is more than 10.306 mm (0.405 in.), machine the bush bore to the dimension of 10.335 to 10.356 mm (0.406 to 0.407 in.) to install an O/S 0.05 valve guide bush.

      If the bush bore diameter of the cylinder head 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.

   7. 

      *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. 

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

      Standard oil clearance
      0.025 to 0.065 mm (0.00098 to 0.00256 in.)

3. REPLACE RING PIN

   

   *A	for Bank 1
   *B	for Bank 2
   *a	Protrusion Height

   Note

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

   
   

   1. Using a plastic-faced hammer, tap in 8 new ring pins to the specified protrusion height.

      Standard protrusion height
      2.5 to 3.5 mm (0.0984 to 0.1378 in.)

4. REPLACE STRAIGHT PIN

   Note

   It is not necessary to remove the straight pin unless it is being replaced.

   
   

   1. Using a plastic-faced hammer, tap in 4 new straight pins as shown in the illustration.

      

      *A	for Bank 1	*B	for Bank 2
      *a	Protrusion Height	*b	34 mm (1.34 in.)

      Standard protrusion height
      17.5 to 19.5 mm (0.689 to 0.768 in.)