CYLINDER HEAD DISASSEMBLY

Tech Tips


  • Select the No. 1 valve rocker arm sub-assemblies, inner compression springs and valve spring retainers based on the identification mark on the cylinder head.

    A01NCMKE01
    Text in Illustration
    *A Type A *B Type B
    *C Cylinder Head RH *D Cylinder Head LH
    *a Identification Mark - -
    Type Identification Mark Inner Compression Spring Shape
    A 1 Hole Straight
    B 2 Holes Taper
  • A01NH31E01

    There are 2 types of No. 1 valve rocker arm sub-assemblies, inner compression springs and valve spring retainers. The 2 types are not interchangeable.

    Text in Illustration
    *A Type A
    *B Type B
    *1 No. 1 Valve Rocker Arm Sub-assembly
    *2 Valve Spring Retainer
    *3 Inner Compression Spring
    *a Valve Spring Retainer Diameter
    *b No. 1 Valve Rocker Arm Sub-assembly Roller Width
    Type No. 1 Valve Rocker Arm Sub-assembly Roller Width Valve Spring Retainer 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

  1. REMOVE VALVE STEM CAP


    1. Remove the valve stem caps from the cylinder heads.

      Tech Tips

      Arrange the removed parts in the correct order.

  2. REMOVE INTAKE VALVE

    Tech Tips

    Type A and Type B can be distinguished by the shape of the inner compression spring.

    A01NH31E01
    Text in Illustration
    *A Type A
    *B Type B
    *1 No. 1 Valve Rocker Arm Sub-assembly
    *2 Valve Spring Retainer
    *3 Inner Compression Spring
    *a Valve Spring Retainer Diameter
    *b No. 1 Valve Rocker Arm Sub-assembly Roller Width
    Type No. 1 Valve Rocker Arm Sub-assembly Roller Width Valve Spring Retainer 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

    1. Type A:


      1. A01NCU3E01

        Using SST, compress the inner compression spring and remove the valve spring retainer locks.

        SST
        09202-70020   ( 09202-00010, 09202-01010, 09202-01020 )

    2. Type B:


      1. A01ND4PE01

        Using SST, compress the inner compression spring and remove the valve spring retainer locks.

        SST
        09202-70020   ( 09202-01010, 09202-01020 )
        09202-00020

    3. Remove the valve spring retainer, inner compression spring and intake valve.

      Tech Tips

      Arrange the removed parts in the correct order.

  3. REMOVE EXHAUST VALVE

    Tech Tips

    Type A and Type B can be distinguished by the shape of the inner compression spring.

    A01NH31E01
    Text in Illustration
    *A Type A
    *B Type B
    *1 No. 1 Valve Rocker Arm Sub-assembly
    *2 Valve Spring Retainer
    *3 Inner Compression Spring
    *a Valve Spring Retainer Diameter
    *b No. 1 Valve Rocker Arm Sub-assembly Roller Width
    Type No. 1 Valve Rocker Arm Sub-assembly Roller Width Valve Spring Retainer 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

    1. Type A:


      1. A01NGKXE01

        Using SST, compress the inner compression spring and remove the valve spring retainer locks.

        SST
        09202-70020   ( 09202-00010, 09202-01010, 09202-01020 )

    2. Type B:


      1. A01NH5UE01

        Using SST, compress the inner compression spring and remove the valve spring retainer locks.

        SST
        09202-70020   ( 09202-01010, 09202-01020 )
        09202-00020

    3. Remove the valve spring retainer, inner compression spring and exhaust valve.

      Tech Tips

      Arrange the removed parts in the correct order.

  4. REMOVE VALVE STEM OIL SEAL


    1. A01NCMWE01

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

  5. REMOVE VALVE SPRING SEAT


    1. A01NGIPE01

      Using compressed air and a Magnet Hand, remove the valve spring seats by blowing air onto them.

  6. REMOVE NO. 1 STRAIGHT SCREW PLUG


    1. A01NERVE11

      Using a 10 mm hexagon wrench, remove the 4 No. 1 straight screw plugs and 4 gaskets.

      Note

      If water leaks from a straight screw plug or the plug is corroded, replace it.

  7. REMOVE NO. 2 STRAIGHT SCREW PLUG


    1. A01NEFPE10

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

      Note

      If water leaks from a straight screw plug or the plug is corroded, replace it.