Honda EU3000i Handi, Manual

Page: 165 / 194

CYLINDER HEAD
14-10
The 32° cutter removes material from the top edge
(contact too high).
The 60° cutter removes material from the bottom edge
(contact too low).
Be sure that the width of the finished valve seat is within
specification.
Make a light pass with 45° cutter to remove any
possible burrs at the edge of the seat.
After resurfacing the seats, inspect for even valve
seating.
Apply Prussian Blue compound or erasable felt-tipped
marker ink to the valve seat. Insert the valve, and snap
it closed against its seat several times. Be sure the
valve does not rotate on the seat.
The seating surface, as shown by the transferred
marking compound, should have good contact all the
way around.
Thoroughly clean the cylinder head to remove any
cutting residual.
Lap the valves into their seats, using a commercially
available valve lapper (1) and lapping compound.
After lapping, wash all residual compound off the
cylinder head and valve.
• Do not push the valve against the seat with force
during lapping. Apply a light pass with the valve
lapper.
• Avoid lapping the valve in the same position as it
causes uneven wear. Lap the valve by turning the
lapper slowly.
• Take care not to allow the lapping compound to
enter the gap between the stem and guide.
Adjust the valve clearance after assembly (page 3-7).
TOOLS:
Cutter holder, 5.5
07781-0010101
Flat cutter, 25 07780-0012000
Flat cutter, 28 07780-0012100
TOOLS:
Cutter holder, 5.5
07781-0010101
Interior cutter, 30 07780-0014000
STANDARD: 0.7 – 0.9 mm (0.03 – 0.04 in)
SERVICE LIMIT: 2.0 mm (0.08 in)
TOOLS:
Cutter holder, 5.5
07781-0010101
Seat cutter, 27.5 07780-0010200
Seat cutter, 24.5 07780-0010100
VALVE FACE
CONTACT TOO
HIGH
32°
CONTACT TO STANDARD
VALVE
FACE
VALVE
FACE
VALVE
FACE
60°
CONTACT TOO
LOW
VALVE
FACE
(1)