CYLINDER HEAD REASSEMBLY

CAUTION / NOTICE / HINT

Note

There are two cylinder head assembly shapes. Valve spring type A can only be used with cylinder head type A and valve spring type B can only be used with cylinder head type B. The combination cannot be changed.

Tech Tips


  • A00190XN02

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

    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.)
  • A001F93C02
    *A Valve Spring Type A
    *B Valve Spring Type B
    *1 No. 1 Valve Rocker Arm Sub-assembly
    *2 Valve Spring Retainer
    *3 Inner Compression Spring
    *a Valve Spring Retainer Outer Diameter
    *b No. 1 Valve Rocker Arm Roller Width

    The shape of the inner compression spring determines whether the valve spring type is A or B.

  • The No. 1 valve rocker arm, inner compression spring and valve spring retainer have two different shapes and are not interchangeable.

    Valve Spring Type No. 1 Valve Rocker Arm Roller Width Valve Spring Retainer Outer Diameter Inner Compression Spring Shape
    A 10.7 mm (0.421 in.) 23.4 mm (0.921 in.) Straight
    B 8.0 mm (0.315 in.) 18.9 mm (0.744 in.) Taper

PROCEDURE


  1. REPLACE STUD BOLT

    Note

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


    1. Using E6 and E8 "TORX" socket wrenches, install the stud bolts.

      Torque:
      9.0 N*m  { 92 kgf*cm, 80 in.*lbf }
      for stud bolts A, B, C and D
      A001F58E03
      Text in Illustration
      *a for Bank 2 Intake Side *b for Bank 1 Intake Side
      *c for Bank 2 Exhaust Side *d for Bank 1 Exhaust Side
      *e for Bank 2 Front Side *f for Bank 1 Front Side
      *g 24 mm (0.945 in.) *h 52 mm (2.05 in.)
      *i 12 mm (0.472 in.) *j 45 mm (1.77 in.)
      *k 20 mm (0.787 in.) *l 14 mm (0.551 in.)
      *m 35 mm (1.38 in.) *n 13 mm (0.512 in.)
      *o 29 mm (1.14 in.) - -

  2. INSTALL NO. 2 STRAIGHT SCREW PLUG


    1. A001FTZE02
      *1 for Bank 2:
      *2 for Bank 1:

      Using a 14 mm hexagon wrench, install 2 new gaskets and the 2 straight screw plugs.

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

  3. INSTALL NO. 1 STRAIGHT SCREW PLUG


    1. A0019SLE06
      *1 for Bank 2:
      *2 for Bank 1:

      Using a 10 mm hexagon wrench, install 6 new gaskets and the 6 straight screw plugs.

      Torque:
      44 N*m  { 449 kgf*cm, 32 ft.*lbf }

  4. INSTALL VALVE SPRING SEAT


    1. Install the valve spring seats to the cylinder head.

  5. INSTALL VALVE STEM OIL SEAL


    1. A001CNCE01
      *1 Gray
      *2 Brown
      *3 Intake Side
      *4 Exhaust Side

      Apply a light coat of engine oil to new oil seals.

      Note

      Pay attention when installing the intake and exhaust oil seals. For example, installing the intake oil seal into the exhaust side or installing the exhaust oil seal to the intake side can cause installation problems later.

      Tech Tips

      The intake valve oil seals are gray and the exhaust valve oil seals are black.

    2. A001AIIE01
      *1 CORRECT
      *2 INCORRECT

      Using SST, push in the oil seals.

      SST
      09201-41020

      Note

      Failure to use SST will cause the seal to be damaged or improperly seated.

  6. INSTALL INTAKE VALVE

    Tech Tips

    The shape of the inner compression spring determines whether the valve spring type described here is A or B.


    1. A001AL4E01
      *1 40 mm or more

      Apply plenty of engine oil to the tip area of the intake valve shown in the illustration.

    2. A001CQ7C03
      *A Valve Spring Type B
      *a Narrow
      *b Wide

      Install the valve, compression spring and spring retainer to the cylinder head.

      Note


      • Install the same parts in the same combination to their original locations.

      • Valve Spring Type B:

        Install the inner compression spring to the wide end of the cylinder head sub-assembly.

    3. A001C2IE01

      Valve Spring Type A:


      1. Using SST and wooden blocks, compress the spring and install the retainer lock.

        SST
        09202-70020   ( 09202-00010, 09202-01010, 09202-01020 )
      2. A001DT8

        Using a plastic-faced hammer, lightly tap the valve stem tip to ensure a proper fit.

        Note


        • Do not damage the valve stem tip.

        • Be careful not to damage the retainer.

    4. A001F5BE01

      Valve Spring Type B:


      1. Using SST and wooden blocks, compress the spring and install the retainer lock.

        SST
        09202-70020   ( 09202-01010, 09202-01020 )
        09202-00021
      2. A001BKK

        Using a plastic-faced hammer, lightly tap the valve stem tip to ensure a proper fit.

        Note


        • Do not damage the valve stem tip.

        • Be careful not to damage the retainer.

  7. INSTALL EXHAUST VALVE

    Tech Tips

    The shape of the inner compression spring determines whether the valve spring type described here is A or B.


    1. A001C6SE01
      *1 40 mm or more

      Apply plenty of engine oil to the tip area of the exhaust valve shown in the illustration.

    2. A001EKUC04
      *A Valve Spring Type B
      *a Narrow
      *b Wide

      Install the valve, compression spring and spring retainer to the cylinder head.

      Note


      • Install the same parts in the same combination to their original locations.

      • Valve Spring Type B:

        Install the inner compression spring to the wide end of the cylinder head sub-assembly.

    3. A001D8ZE01

      Valve Spring Type A:


      1. Using SST and wooden blocks, compress the spring and install the retainer lock.

        SST
        09202-70020   ( 09202-00010, 09202-01010, 09202-01020 )
      2. A001FD3

        Using a plastic-faced hammer, lightly tap the valve stem tip to ensure a proper fit.

        Note


        • Do not damage the valve stem tip.

        • Be careful not to damage the retainer.

    4. A001AYTE01

      Valve Spring Type B:


      1. Using SST and wooden blocks, compress the spring and install the retainer lock.

        SST
        09202-70020   ( 09202-01010, 09202-01020 )
        09202-00021
      2. A001CQ2

        Using a plastic-faced hammer, lightly tap the valve stem tip to ensure a proper fit.

        Note


        • Do not damage the valve stem tip.

        • Be careful not to damage the retainer.