CYLINDER HEAD REPLACEMENT

PROCEDURE


  1. REPLACE INTAKE VALVE GUIDE BUSH


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

    2. Place the cylinder head on wooden blocks.

    3. A001EIRE01

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

      SST
      09201-10000   ( 09201-01050 )
      09950-70010   ( 09951-07100 )
    4. A001C4O

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

      Standard cylinder bore diameter
      10.285 to 10.306 mm (0.4049 to 0.4057 in.)

      If the bush bore diameter of the cylinder head is between 10.285 to 10.306 mm (0.4049 to 0.4057 in.), proceed to the next step.

      If the bush bore diameter of the cylinder head is 10.356 mm (0.4077 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.)

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

    8. A001G04E03
      *1 Height

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

      Standard protrusion height
      15.8 to 16.2 mm (0.622 to 0.638 in.)
      SST
      09201-10000   ( 09201-01050 )
      09950-70010   ( 09951-07100 )
    9. A001FXG

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

  2. REPLACE EXHAUST VALVE GUIDE BUSH


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

    2. Place the cylinder head on wooden blocks.

    3. A001C1GE01

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

      SST
      09201-10000   ( 09201-01050 )
      09950-70010   ( 09951-07100 )
    4. A001DIA

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

      Standard cylinder bore diameter
      10.285 to 10.306 mm (0.4049 to 0.4057 in.)

      • If the bush diameter of the cylinder head is between 10.285 to 10.306 mm (0.4049 to 0.4057 in.), proceed to the next step.

      • If the bush bore diameter of the cylinder head is 10.356 mm (0.4077 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.)

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

    8. A001AP1E03
      *1 Height

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

      SST
      09201-10000   ( 09201-01050 )
      09950-70010   ( 09951-07100 )
      Standard protrusion height
      15.8 to 16.2 mm (0.622 to 0.638 in.)
    9. A001DYI

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

  3. REPLACE SPARK PLUG TUBE

    A001FFPE01
    *1 Adhesive
    *2 15 mm

    Tech Tips

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


    1. Remove the spark plug tube.

    2. 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. A001C22E01
      *1 Cylinder Head Top Surface
      *2 66.6 to 67.6 mm

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

      Standard protrusion height
      66.6 to 67.6 mm (2.62 to 2.66 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 until the pin stops.

      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.)
      A0019CME14
      *1 for Bank 1:
      *2 for Bank 2:
      *3 5.5 to 6.5 mm
      *4 3.5 to 6.5 mm