Disassembly

CYLINDER HEAD

COMPONENTS:

DISASSEMBLY
1. REMOVE VALVE LIFTER

HINT: Arrange the valve lifters in the correct order.

2. REMOVE INTAKE VALVE
a) Place the cylinder head on wooden blocks.
b) Using SST, compress the spring, then remove the 2 retainer locks.
SST 09202-70020 (09202-00010)
c) Remove the retainer, spring and valve from the cylinder head.

HINT: Arrange the removed parts in the correct order.

3. REMOVE EXHAUST VALVE
a) Place the cylinder head on wooden blocks.
b) Using SST, compress the spring, then remove the 2 retainer locks.
SST 09202-70020 (09202-00010)
c) Remove the retainer, spring and valve from the cylinder head.

HINT: Arrange the removed parts in the correct order.

4. REMOVE VALVE SPRING SEAT

5. REMOVE VALVE STEM OIL SEAL
a) Using needle-nose pliers, remove the 16 oil seals.
6. REMOVE RING PIN
a) Remove the 4 ring pins.

7. REMOVE STUD BOLT
a) Using E5 and E7 Torx socket wrenches, remove the 11 stud bolts.

REPLACEMENT

1. REMOVE INTAKE VALVE GUIDE BUSH
a) Heat the cylinder head to 80 to 100°C (176 to 212°F).
b) Place the cylinder head on wooden blocks.

c) Using SST and a hammer, tap out the guide bush.
SST 09201-10000 (09201-01050), 09950-70010 (09951-07100)

2. REMOVE EXHAUST VALVE GUIDE BUSH
a) Heat the cylinder head to 80 to 100°C (176 to 212°F).
b) Place the cylinder head on wooden blocks.

c) Using SST and a hammer, tap out the guide bush.
SST 09201-10000 (09201-01050), 09950-70010 (09951-07100)

3. INSTALL INTAKE VALVE GUIDE BUSH
a) Heat the cylinder head to 80 to 100°C (176 to 212°F).
b) Place the cylinder head on wooden blocks.
c) Using a caliper gauge, measure the bush bore diameter of the cylinder head.
Standard diameter: 10.285 to 10.306 mm (0.4049 to 0.4058 inch)
d) Install the STD bush if the diameter is within the specified diameter.
Standard diameter: 10.333 to 10.344 mm (0.4068 to 0.4072 inch)

e) Using SST and a hammer, tap in a new guide bush to the specified protrusion height.
SST 09201-10000 (09201-01050), 09950-70010 (09951-07100)
Standard protrusion height: 9.6 to 10 mm (0.3780 to 0.3937 inch)
f) Using a sharp 5.5 mm reamer, ream the valve guide bush to the standard specified clearance between the valve guide bush and valve stem.
Standard oil clearance: 0.025 to 0.060 mm (0.0010 to 0.0024 inch)

4. INSTALL EXHAUST VALVE GUIDE BUSH
a) Heat the cylinder head to 80 to 100°C (176 to 212°F).
b) Place the cylinder head on wooden blocks.
c) Using a caliper gauge, measure the bush bore diameter of the cylinder head.
Standard diameter: 10.285 to 10.306 mm (0.4049 to 0.4058 inch)
d) Install the STD bush if the diameter is within the specified diameter.
Standard diameter: 10.333 to 10.344 mm (0.4068 to 0.4072 inch)

e) Using SST and a hammer, tap in a new guide bush to the specified protrusion height.
SST 09201-10000 (09201-01050), 09950-70010 (09951-07100)
Standard protrusion height: 9.6 to 10.0 mm (0.3780 to 0.3937 inch)
f) Using a sharp 5.5 mm reamer, ream the valve guide bush to the standard specified clearance between the valve guide bush and valve stem.
Standard oil clearance: 0.030 to 0.065 mm (0.0012 to 0.0026 inch)

REPAIR

1. REPAIR VALVE SEATS

NOTICE: Releasing the seat cutter pressure gradually helps to make the valve seat faces smoother.

a) If the seating is too high on the valve face, use 30° and 45° cutters to correct the seat.

b) If the seating is too low on the valve face, use 75° and 45° cutters to correct the seat.
c) Lap the valve and valve seat by hand with an abrasive compound.
d) Recheck the valve seating position.