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Replacement [09/2022 - ]: Procedure

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  1. REPLACE INTAKE VALVE GUIDE BUSH 
    1. Heat the cylinder head sub-assembly to between 80 and 100°C (176 to 212°F).
    2. Place the cylinder head sub-assembly on wooden blocks.
      WARNING:

      Be sure to wear protective gloves.

    3. Using SST and a hammer, tap out the intake valve guide bush.
      GTY1020488Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      • SST: 09201-01055 
      • SST: 09950-70010 
        1. 09951-07100
    4. Using a caliper gauge, measure the intake valve guide bush bore diameter of the cylinder head sub-assembly.
      GTY1019287Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard Intake Valve Guide Bush Bore Diameter

      10.285 to 10.306 mm (0.405 to 0.406 in.)

      New Guide Bush Selection Chart

      Bush Size Specified Condition
      STD 10.333 to 10.344 mm (0.40681 to 0.40724 in.)
      O/S 0.05 10.383 to 10.394 mm (0.40878 to 0.40921 in.)

      Standard Bush Length

      41.3 to 41.7 mm (1.63 to 1.64 in.)

      HINT: 

      • If the intake valve guide bush bore diameter of the cylinder head sub-assembly is more than 10.306 mm (0.406 in.), machine the intake valve guide bush bore of the cylinder head sub-assembly to a dimension of 10.335 to 10.356 mm (0.407 to 0.408 in.) to install an O/S 0.05 intake valve guide bush.
      • If the intake valve guide bush bore diameter of the cylinder head sub-assembly is more than 10.356 mm (0.408 in.), replace the cylinder head sub-assembly.
    5. Heat the cylinder head sub-assembly to between 80 and 100°C (176 to 212°F).
    6. Using SST and a hammer, tap in the selected intake valve guide bush.
      GTY1020022Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Protrusion Height
      • SST: 09201-10000 
        1. 09201-01050
      • SST: 09950-70010 
        1. 09951-07100

      Standard Protrusion Height

      13.35 to 13.60 mm (0.526 to 0.535 in.)

    7. Using a sharp 5.5 mm reamer, ream the intake valve guide bush to obtain the standard oil clearance.
      GTY1020379Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard Oil Clearance

      0.025 to 0.060 mm (0.000984 to 0.00236 in.)

  2. REPLACE EXHAUST VALVE GUIDE BUSH 
    1. Heat the cylinder head sub-assembly to between 80 and 100°C (176 to 212°F).
    2. Place the cylinder head sub-assembly on wooden blocks.
      WARNING:

      Be sure to wear protective gloves.

    3. Using SST and a hammer, tap out the exhaust valve guide bush.
      GTY1019413Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      • SST: 09201-01055 
      • SST: 09950-70010 
        1. 09951-07100
    4. Using a caliper gauge, measure the exhaust valve guide bush bore diameter of the cylinder head sub-assembly.
      GTY1019418Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard Exhaust Valve Guide Bush Bore Diameter

      10.285 to 10.306 mm (0.405 to 0.406 in.)

      New Guide Bush Selection Chart

      Bush Size Specified Condition
      STD 10.333 to 10.344 mm (0.40681 to 0.40724 in.)
      O/S 0.05 10.383 to 10.394 mm (0.40878 to 0.40921 in.)

      Standard Bush Length

      43.3 to 43.7 mm (1.70 to 1.72 in.)

      HINT: 

      • If the exhaust valve guide bush bore diameter of the cylinder head sub-assembly is more than 10.306 mm (0.406 in.), machine the exhaust valve guide bush bore of the cylinder head sub-assembly to a dimension of 10.335 to 10.356 mm (0.407 to 0.408 in.) to install an O/S 0.05 exhaust valve guide bush.
      • If the exhaust valve guide bush bore diameter of the cylinder head sub-assembly is more than 10.356 mm (0.408 in.), replace the cylinder head sub-assembly.
    5. Heat the cylinder head sub-assembly to between 80 and 100°C (176 to 212°F).
    6. Using SST and a hammer, tap in the selected exhaust valve guide bush.
      GTY1019259Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Protrusion Height
      • SST: 09201-10000 
        1. 09201-01050
      • SST: 09950-70010 
        1. 09951-07100

      Standard Protrusion Height

      13.75 to 14.00 mm (0.541 to 0.551 in.)

    7. Using a sharp 5.5 mm reamer, ream the exhaust valve guide bush to obtain the standard oil clearance.
      GTY1019416Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard Oil Clearance

      0.030 to 0.065 mm (0.00118 to 0.00256 in.)

  3. REPLACE RING PIN 
    NOTE:

    It is not necessary to remove the ring pins unless they are being replaced.

    1. Remove the 8 ring pins.
    2. Using a plastic hammer, tap in 8 new ring pins to the cylinder head sub-assembly.
      GTY1019697Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Protrusion Height

      Standard Protrusion Height

      Ring Pin (A) 

      3.0 to 5.0 mm (0.118 to 0.197 in.)

      Ring Pin (B) 

      4.0 to 6.0 mm (0.157 to 0.236 in.)

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