Kawasaki STX-15F 用户手册
ENGINE TOP END 6-25
Valves
Valve Guide Installation
•
Apply engine oil to the valve guide outer surface before
installation.
installation.
•
Heat the area around the valve guide hole to about 120
∼
150°C (248
∼
302°F).
•
Drive the valve guide in from the top of the head using the
valve guide arbor. The flange stops the guide from going
in too far.
valve guide arbor. The flange stops the guide from going
in too far.
Special Tool - Valve Guide Arbor, 5: 57001-1203
•
Ream the valve guide with valve guide reamer [A] even if
the old guide is reused.
the old guide is reused.
Special Tool - Valve Guide Reamer, 5: 57001-1204
Valve-to-Guide Clearance Measurement (Wobble
Method)
If a small bore gauge is not available, inspect the valve
guide wear by measuring the valve to valve guide clearance
with the wobble method as indicated below.
with the wobble method as indicated below.
•
Insert a new valve [A] into the guide [B] and set a dial
gauge against the stem perpendicular to it as close as
possible to the cylinder head mating surface.
gauge against the stem perpendicular to it as close as
possible to the cylinder head mating surface.
•
Move the stem back and forth [C] to measure valve/valve
guide clearance.
guide clearance.
•
Repeat the measurement in a direction at a right angle to
the first.
If the reading exceeds the service limit, replace the guide.
the first.
If the reading exceeds the service limit, replace the guide.
NOTE
○
The reading is not actual valve/valve guide clearance
because the measuring point is above the guide.
because the measuring point is above the guide.
Valve/Valve Guide Clearance (Wobble Method)
Standard:
Exhaust
0.09
∼
0.17 mm (0.0035
∼
0.0067 in.)
Inlet
0.03
∼
0.11 mm (0.0012
∼
0.0043 in.)
Service Limit:
Exhaust
0.35 mm (0.014 in.)
Inlet
0.29 mm (0.011 in.)