CYLINDER HEAD DISASSEMBLY

PROCEDURE


  1. REMOVE INTAKE VALVE


    1. B0076N6N03

      Using SST, compress the compression spring and remove the 8 valve spring retainer locks.

      SST
      09202-70020
      09202-00021

    2. Remove the 8 valve spring retainers, 8 compression springs and 8 intake valves.

      Tech Tips

      Arrange the removed parts in the correct order.

  2. REMOVE EXHAUST VALVE

    CAUTION:


    • The exhaust valve is filled with sodium. Sodium is a strong alkali which can produce a dangerous chemical reaction. Be very careful when handling and disposing of it.

    • Do not intensionally expose the sodium in exhaust valve. If sodium enters your eyes, vision loss may occur. If sodium contacts your skin, burns may occur. If a fire occurs due to a chemical reaction with sodium, burns may occur.

    • If the sodium in the exhaust valve is exposed, perform all necessary preparations to safely remove and dispose of the sodium.

    • When removing a damaged exhaust valve, always wear rubber gloves and safety glasses.

    • Do not intentionality cut or break open the exhaust valve to remove the sodium.

    Tech Tips


    • The sodium inside the exhaust valve is safe as long as it remains sealed inside the exhaust valve.

    • Exhaust valves filled with sodium can be identified by their "NA" identification mark.


    1. A01R6W5N02

      Using SST, compress the compression spring and remove the 8 valve spring retainer locks.

      SST
      09202-70020
      09202-00021

    2. Remove the 8 valve spring retainers, 8 compression springs and 8 exhaust valves.

      Tech Tips

      Arrange the removed parts in the correct order.

  3. REMOVE VALVE STEM OIL SEAL


    1. A01R6VH

      Using needle-nose pliers, remove the 16 valve stem oil seals.

  4. REMOVE VALVE SPRING SEAT


    1. A01R6BZ

      Using compressed air and a Magnet Hand, remove the 16 valve spring seats from the cylinder head sub-assembly by blowing air onto them.

  5. REMOVE NO. 1 STRAIGHT SCREW PLUG

    Note

    If coolant leaks from a No. 1 straight screw plug or the plug is corroded, replace it.


    1. A01R7F9

      Using a 14 mm hexagon wrench, remove the 6 No. 1 straight screw plugs and 6 gaskets.

  6. REMOVE STUD BOLT

    Note

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

  7. DISPOSE OF EXHAUST VALVE

    CAUTION:


    • The exhaust valve is filled with sodium. Sodium is a strong alkali which can produce a dangerous chemical reaction. Be very careful when handling and disposing of it.

    • Do not intensionally expose the sodium in exhaust valve. If sodium enters your eyes, vision loss may occur. If sodium contacts your skin, burns may occur. If a fire occurs due to a chemical reaction with sodium, burns may occur.

    • If the sodium in the exhaust valve is exposed, perform all necessary preparations to safely remove and dispose of the sodium.

    • When removing a damaged exhaust valve, always wear rubber gloves and safety glasses.

    • Do not intentionality cut or break open the exhaust valve to remove the sodium.

    Tech Tips


    • The sodium inside the exhaust valve is safe as long as it remains sealed inside the exhaust valve.

    • Exhaust valves filled with sodium can be identified by their "NA" identification mark.


    1. Waste disposal preparation

      CAUTION:

      Observe the following precautions when performing the disposal procedure.


      1. Have a suitable fire extinguisher close by.

      2. Wear safety glasses.

      3. Wear rubber gloves.

    2. Waste disposal


      1. Remove the damaged exhaust valve from the cylinder head sub-assembly.

      2. Prepare a large container, such as a bucket or oil can, filled with 10 L or more of water and place it in a well ventilated area.

      3. Using pliers or a large pair of tweezers, hold the damaged exhaust valve upright and submerge it into the water.

        CAUTION:


        • Make sure to fully submerge the damaged exhaust valve in water.

        • Do not allow any sparks or other flames near the container as hydrogen gas is generated by the chemical reaction.

        • Stay at least 2 m away from the receptacle as a strong chemical reaction occurs.