CYLINDER HEAD REPLACEMENT

PROCEDURE


  1. REPLACE INTAKE VALVE GUIDE BUSH

    Note

    The standard protrusion amount (A) of the valve guide bush determines whether the cylinder head is type A or B. Therefore, measure the standard protrusion amount (A) before removing the valve guide bush.

    A01X2ILN01
    Standard Protrusion Height (A)
    Type Specified Condition
    Cylinder Head Type A 14.3 to 14.7 mm (0.563 to 0.579 in.)
    Cylinder Head Type B 15.8 to 16.2 mm (0.622 to 0.638 in.)

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

    2. Place the cylinder head on wooden blocks.

    3. A01XB7NE06

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

      SST
      09201-10000   ( 09201-01050 )
      09950-70010   ( 09951-07100 )

    4. Using a caliper gauge, measure the bush bore diameter of the cylinder head side.

      Standard bush bore diameter
      10.285 to 10.306 mm (0.405 to 0.406 in.)

      If the bush bore diameter of the cylinder head is between 10.285 and 10.306 mm (0.405 and 0.406 in.), proceed to the next step.

      If the bush bore diameter of the cylinder head is 10.356 mm (0.408 in.) or more, replace the cylinder head.

    5. Select a new guide bush (STD or O/S 0.05), and measure its diameter.

    6. Machine the bush bore diameter of the cylinder head side to the diameter of the selected guide bush.

      Bush Bore Diameter
      Bush Size Specified Condition
      STD 10.333 to 10.344 mm (0.4068 to 0.4072 in.)
      O/S 0.05 10.383 to 10.394 mm (0.4088 to 0.4092 in.)
      Standard bush length
      41.3 to 41.7 mm (1.63 to 1.64 in.)
    7. A01X9GYE15

      Using SST and a hammer, tap in a new guide bush to the standard protrusion height (A).

      SST
      09201-10000   ( 09201-01050 )
      09950-70010   ( 09951-07100 )
      Standard Protrusion Height (A)
      Type Specified Condition
      Cylinder Head Type A 14.3 to 14.7 mm (0.563 to 0.579 in.)
      Cylinder Head Type B 15.8 to 16.2 mm (0.622 to 0.638 in.)

      Note

      Install the valve guide bush after determining cylinder head type A and B.

    8. A01X7B3

      Using a sharp 5.5 mm reamer, ream the guide bush to obtain the standard oil clearance between the guide bush and valve stem.

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

  2. REPLACE EXHAUST VALVE GUIDE BUSH

    Note

    The standard protrusion amount (A) of the valve guide bush determines whether the cylinder head is type A or B. Therefore, measure the standard protrusion amount (A) before removing the valve guide bush.

    A01X2ILN01
    Standard Protrusion Height (A)
    Type Specified Condition
    Cylinder Head Type A 14.3 to 14.7 mm (0.563 to 0.579 in.)
    Cylinder Head Type B 15.8 to 16.2 mm (0.622 to 0.638 in.)

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

    2. Place the cylinder head on wooden blocks.

    3. A01X1J7E02

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

      SST
      09201-10000   ( 09201-01050 )
      09950-70010   ( 09951-07100 )

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

      Standard bush bore diameter
      10.285 to 10.306 mm (0.405 to 0.406 in.)

      If the bush bore diameter of the cylinder head is between 10.285 and 10.306 mm (0.405 and 0.406 in.), proceed to the next step.

      If the bush bore diameter of the cylinder head is 10.356 mm (0.408 in.) or more, replace the cylinder head.

    5. Select a new guide bush (STD or O/S 0.05), and measure its diameter.

    6. Machine the bush bore diameter of the cylinder head side to the diameter of the selected guide bush.

      Bush Bore Diameter
      Bush Size Specified Condition
      STD 10.333 to 10.344 mm (0.4068 to 0.4072 in.)
      O/S 0.05 10.383 to 10.394 mm (0.4088 to 0.4092 in.)
      Standard bush length
      46.8 to 47.2 mm (1.84 to 1.86 in.)
    7. A01X9FLE15

      Using SST and a hammer, tap in a new guide bush to the standard protrusion height (A).

      SST
      09201-10000   ( 09201-01050 )
      09950-70010   ( 09951-07100 )
      Standard Protrusion Height (A)
      Type Specified Condition
      Cylinder Head Type A 14.3 to 14.7 mm (0.563 to 0.579 in.)
      Cylinder Head Type B 15.8 to 16.2 mm (0.622 to 0.638 in.)

      Note

      Install the valve guide bush after determining cylinder head type A and B.

    8. A01X248

      Using a sharp 5.5 mm reamer, ream the guide bush to obtain the standard oil clearance between the guide bush and valve stem.

      Standard oil clearance
      0.030 to 0.065 mm (0.00118 to 0.00256 in.)

  3. REPLACE SPARK PLUG TUBE

    Tech Tips

    When using a new cylinder head, the spark plug tubes must be replaced.


    1. Remove the spark plug tube.

    2. A01X53OE11
      Text in Illustration
      *1 Adhesive

      Apply adhesive to the end of a new spark plug tube.

      Adhesive
      Toyota Genuine Adhesive 1324, Three Bond 1324 or equivalent.
      Standard seal diameter
      15 mm (0.591 in.)

      Note


      • Install the spark plug tube within 3 minutes after applying adhesive.

      • Be careful not to deform the spark plug tube.

      • Be careful not to expose the seal to coolant for at least 1 hour after installing it.

    3. A01X6OWE01
      Text in Illustration
      *1 Cylinder Head Top Surface
      *a 75.1 to 76.1 mm

      Using a wooden block and hammer, tap in the spark plug tube to the specified protrusion height.

      Standard protrusion height
      75.1 to 76.1 mm (2.96 to 3.00 in.)

      Note

      To avoid tapping in the spark plug tube too far, measure the protrusion height while tapping it.

  4. REPLACE RING PIN

    Note

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


    1. Remove the ring pins.

    2. Using a plastic-faced hammer, tap in new ring pins to the cylinder head.

      Standard Protrusion
      Item Specified Condition
      Ring pin A 5.5 to 6.5 mm (0.217 to 0.256 in.)
      Ring pin B 3.5 to 6.5 mm (0.138 to 0.256 in.)
      A01X2KWE12
      Text in Illustration
      *A for Bank 1 *B for Bank 2
      *a 5.5 to 6.5 mm *b 3.5 to 6.5 mm