SELVA MARINE Fin Whale 225 EFI, Service Manual

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Replacing the valve guide
NOTE:
After replacing a valve guide, check the valve
seat contact area. To check the valve seat
contact area, see Chapter 5,
“ Checking the
valve seat. ”
1. Remove the valve guide
1
using the
special service tool from the combustion
chamber side.
2. Install a new valve guide
2
using the
special service tools from the camshaft
side until the valve guide installer
3
to
the specified height
a
.
NOTE:
Apply engine oil to the outer surface of a new
valve guide.
3. Insert the special service tool into the
valve guide
2
, and then ream the valve
guide.
NOTE:
• Apply engine oil to the inner surface of the
valve guide.
• Turn the valve guide reamer clockwise to
ream the valve guide.
• Do not turn the reamer counterclockwise
when removing the reamer.
• Be sure to clean the valve guide after ream-
ing it.
4. Measure the valve guide inside diameter.
Valve stem-to-valve guide clearance
= valve guide inside diameter
– valve
stem diameter:
Intake:
0.012 – 0.045 mm
(0.0005 – 0.0018 in)
Exhaust:
0.025 – 0.058 mm
(0.0010 – 0.0023 in)
Valve guide remover/installer:
90890-06801
S69J5790
1
S6P25E30
E
3
a
2
Valve guide remover/installer:
90890-06801
Valve guide installer
3
:
90890-06810
Valve guide installation position:
Intake and exhaust
a
:
13.8
±
0.2 mm (0.5
±
0.01 in)
Valve guide reamer: 90890-06804
Valve guide inside diameter:
Intake and exhaust:
5.504 – 5.522 mm
(0.2167 – 0.2174 in)
Cylinder head