CYLINDER HEAD REPLACEMENT

PROCEDURE


  1. REPLACE VALVE STEM OIL SEAL


    1. A01LFJN

      Using needle-nose pliers, remove the valve stem oil seal.

    2. A01LEJJC01
      *a Gray
      *b Black
      *c Intake Side
      *d Exhaust Side

      Apply a light coat of engine oil to the valve stem oil seal.

      Note

      Make sure that the body identification colors of the valve stem oil seals are matching.

    3. A01LAV3N01

      Using SST and a hammer, push in a new valve stem oil seal.

      SST
      09201-41020

  2. REPLACE VALVE GUIDE BUSH


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

      CAUTION:

      Be sure to wear protective gloves.

    2. Place the cylinder on wooden blocks.

    3. A01LA8PN01

      Using SST and a hammer, tap out the intake valve guide bush from the cylinder head.

      SST
      09201-10000
      09201-01055
      09950-70010   ( 09951-07100 )

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

      Standard Bush Bore Diameter
      Item Specified Condition
      STD 10.285 to 10.306 mm (0.405 to 0.406 in.)
      O/S 0.05 10.335 to 10.356 mm (0.407 to 0.408 in.)

      If the valve guide bush bore diameter of the cylinder head is more than 10.306 mm (0.406 in.), machine the valve guide bush bore diameter to between 10.335 and 10.356 mm (0.407 and 0.408 in.).

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

    5. Select a new valve guide bush (STD or O/S 0.05).

      Valve Guide Bush
      Bush Size Specified Condition
      Use STD 10.333 to 10.344 mm (0.4068 to 0.4072 in.)
      Use O/S 0.05 10.383 to 10.394 mm (0.4088 to 0.4092 in.)

      Tech Tips

      Standard Bush Length
      Item Specified Condition
      Intake side 34.3 to 34.7 mm (1.35 to 1.37 in.)
      Exhaust side 40.3 to 40.7 mm (1.59 to 1.60 in.)

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

      CAUTION:

      Be sure to wear protective gloves.

    7. Place the cylinder head on wooden blocks.

    8. A01L8QMN01

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

      SST
      09201-10000
      09201-01055
      09950-70010   ( 09951-07100 )
      Standard protrusion height
      9.3 to 9.7 mm (0.366 to 0.382 in.)

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

      Standard Oil Clearance
      Item Specified Condition
      Intake side 0.025 to 0.060 mm (0.000984 to 0.00236 in.)
      Exhaust side 0.030 to 0.065 mm (0.00118 to 0.00256 in.)

  3. REPLACE UNION

    Tech Tips

    Perform this procedure only when replacement of the union is necessary.


    1. Remove the unions from the cylinder head sub-assembly (front side) and cylinder head LH (intake port side).

    2. Apply adhesive to 2 or 3 threads of the bolt ends of new unions.

      Adhesive
      Toyota Genuine Seal Adhesive 1324, Three Bond 1324 or equivalent

    3. Using a 12 mm deep socket wrench, install the 2 unions.

      Torque:
      14.7 N*m  { 150 kgf*cm, 11 ft.*lbf }
      A01L95VC01
      *A for Bank 1 *B for Bank 2
      *a Front Side *b Intake Port Side
      *c 67 mm (2.64 in.) *d 30 mm (1.18 in.)

  4. REPLACE NO. 1 STRAIGHT SCREW PLUG

    Note

    It is not necessary to remove the No. 1 straight screw plug unless it is being replaced.


    1. Using a 14 mm hexagon wrench, remove the No. 1 straight screw plug and gasket.

      A01L82UC01
      *A for Bank 1 *B for Bank 2
      *1 No. 1 Straight Screw Plug *2 Gasket

    2. Using a 14 mm hexagon wrench, install a new gasket and No. 1 straight screw plug.

      Torque:
      80 N*m  { 816 kgf*cm, 59 ft.*lbf }

  5. REPLACE NO. 2 STRAIGHT SCREW PLUG

    Note

    It is not necessary to remove the No. 2 straight screw plug plug unless it is being replaced.


    1. Using a 14 mm hexagon wrench, remove the No. 2 straight screw plug and gasket.

      A01LALZC01
      *A for Bank 1 *B for Bank 2
      *1 No. 2 Straight Screw Plug *2 Gasket

    2. Using a 14 mm hexagon wrench, install a new gasket and No. 2 straight screw plug.

      Torque:
      85 N*m  { 867 kgf*cm, 63 ft.*lbf }

  6. 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 they reach the standard protrusion height.

      Standard protrusion height
      2.7 to 3.3 mm (0.106 to 0.130 in.)
      A01LDTMC01
      *A for Bank 1 *B for Bank 2
      *a Protrusion Height *b Engine Front

  7. REPLACE STRAIGHT PIN

    Note

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


    1. Remove the straight pins.

    2. Using a plastic-faced hammer, tap in new straight pins until they reach the standard protrusion height.

      Standard Protrusion Height
      Item Specified Condition
      Straight pin A 17.5 to 19.5 mm (0.689 to 0.768 in.)
      Straight pin B 7.5 to 8.5 mm (0.295 to 0.335 in.)
      Straight pin C 7.0 to 9.0 mm (0.276 to 0.354 in.)
      A01LEKJC01
      *A for Bank 1 *B for Bank 2
      *1 Straight Pin A *2 Straight Pin B
      *3 Straight Pin C - -
      *a Front Side *b Upper Side
      *c Intake Manifold Side *d 8.0 mm (0.315 in.)
      *e 34.0 mm (1.34 in.) *f 5.0 mm (0.197 in.)
      *g 13.8 mm (0.543 in.) *h Protrusion Height

  8. REPLACE STUD BOLT

    Note

    If a stud bolt is deformed or its threads are damaged, replace it.


    1. Using an E6 and E7 "TORX" socket wrench, remove the stud bolts.

    2. Using an E6 and E7 "TORX" socket wrench, install new stud bolts.

      Torque:
      for stud bolt A
      4.0 N*m  { 41 kgf*cm, 35 in.*lbf }
      for stud bolt B
      9.5 N*m  { 97 kgf*cm, 84 in.*lbf }
      for stud bolt C
      4.0 N*m  { 41 kgf*cm, 35 in.*lbf }
      A01LBV5C01
      *A for Bank 1 *B for Bank 2
      *a Upper Side *b Rear Side
      *c Exhaust Manifold Side *d 21 mm (0.827 in.)
      *e 34 mm (1.34 in.) *f 9 mm (0.354 in.)
      *g 20 mm (0.787 in.) *h 35 mm (1.38 in.)
      *i 13 mm (0.512 in.) *j 16 mm (0.630 in.)
      *k 27 mm (1.06 in.) - -