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


  • A01X2ILN02

    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.)
  • A01XBCZC02
    *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. INSTALL STUD BOLT

    Note

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


    1. Using E7 and E8 "TORX" socket wrenches, install the stud bolts.

      Torque:
      9.0 N*m  { 92 kgf*cm, 80 in.*lbf }
      A01X2PRE01
      Text in Illustration
      *a for Intake Side of Bank 2 *b for Intake Side of Bank 1
      *c for Exhaust Side of Bank 2 *d for Exhaust Side of Bank 1
      *e for Front Side of Bank 2 *f for Front Side of Bank 1

  2. INSTALL NO. 2 STRAIGHT SCREW PLUG


    1. Using a 14 mm hexagon wrench, install 2 new gaskets and the 2 No. 2 straight screw plugs.

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

  3. INSTALL NO. 1 STRAIGHT SCREW PLUG


    1. Using a 10 mm hexagon wrench, install 6 new gaskets and the 6 No. 1 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. A01X388E01
      Text in Illustration
      *A for Intake Side
      *B for Exhaust Side
      *1 Brown
      *2 Gray

      Apply a light coat of engine oil to 2 new valve stem oil seals.

      Note

      Pay attention when installing the intake and exhaust valve stem oil seals. Installing the intake valve stem oil seal to the exhaust side or installing the exhaust valve stem oil seal to the intake side can cause installation problems later.

      Tech Tips

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

    2. A01X8NXE03
      Text in Illustration
      *a CORRECT
      *b INCORRECT

      Using SST, push in the valve stem 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. A01X4LZE01
      Text in Illustration
      *a 40 mm (1.57 in.) or more

      Apply a sufficient coat of engine oil to the tip area of the intake valve as shown in the illustration.

    2. A01XBIZE03
      Text in Illustration
      *A Valve Spring Type B
      *a Narrow
      *b Wide

      Install the intake valve, compression spring and valve 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. A01X096E03

      Valve Spring Type A:


      1. Using SST, compress the compression spring and install the 2 valve spring retainer locks.

        SST
        09202-70020   ( 09202-00010, 09202-01010, 09202-01020 )
      2. A01X4MQ

        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. A01X6P2E01

      Valve Spring Type B:


      1. Using SST, compress the compression spring and install the 2 valve spring retainer locks.

        SST
        09202-70020   ( 09202-01010, 09202-01020 )
        09202-00021
      2. A01XBYT

        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. A01X8TFE01
      Text in Illustration
      *a 40 mm (1.57 in.) or more

      Apply a sufficient coat of engine oil to the tip area of the exhaust valve as shown in the illustration.

    2. A01X0SNE03
      Text in Illustration
      *A Valve Spring Type B
      *a Narrow
      *b Wide

      Install the exhaust valve, compression spring and valve 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. A01X0E6E03

      Valve Spring Type A:


      1. Using SST, compress the compression spring and install the 2 valve spring retainer locks.

        SST
        09202-70020   ( 09202-00010, 09202-01010, 09202-01020 )
      2. A01X3DP

        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. A01X5PRE01

      Valve Spring Type B:


      1. Using SST, compress the compression spring and install the 2 valve spring retainer locks.

        SST
        09202-70020   ( 09202-01010, 09202-01020 )
        09202-00021
      2. A01X1XM

        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.