Checking The Valve Seat - SELVA MARINE Kingfish 25 Service Manual

3
a
E
Valve guide remover/installer 2:
90890-06801
Valve guide installation position a:
16.3–16.7 mm (0.64–0.66 in)
4. Insert the special service tool 4 into the
valve guide 3, and then ream the valve
guide.
4
3
Valve guide reamer 4: 90890-06804
TIP:
• Turn the valve guide reamer clockwise to
ream the valve guide.
• Do not turn the valve guide reamer counter-
clockwise when removing it.
• Make sure to clean the valve guide after
reaming it.
5. Measure the valve guide inside diameter.
Valve guide inside diameter:
Intake and exhaust:
5.500–5.512 mm (0.2165–0.2170 in)

Checking the valve seat

1. Remove carbon
valves.
2
E
deposits from the
2. Apply a thin, even layer of Mechanic's
blueing dye (Dykem) onto the valve seat.
3. Press the valve lightly against the valve
seat using the special service tool 1.
Valve lapper 1: 90890-04101
4. Measure the valve seat contact width a
where the blueing dye is adhered to the
valve face. Reface the valve seat if the
valve is not seated properly or if the valve
seat contact width is out of specification.
Check the valve guide if the valve seat
contact width is uneven.
a
Camshaft and valve
1
7-42
7