Vertical Crankshaft Service Manual

Section 9
Inspection and Reconditioning
9
9.5
EXHAUST VALVE
INTAKE VALVE
AB
C
D
D
F
E
G
H
F
E
G
H
INT
EXH
Figure 9-6. Valve Details.
ȱȱȱȱȱȱȱ¢ȱȱ
fuel consumption may be symptoms of faulty valves.
ȱȱ¢ȱȱȱȱĴȱȱ
ȱǰȱȱȱȱȱȱęǯȱĞȱ
removal, clean the valve heads, faces, and stems with
a power wire brush.
Then, carefully inspect each valve for defects such as a
warped head, excessive corrosion, or a worn stem end.
Replace valves found to be in bad condition. A normal
valve and valves in bad condition are shown in the
accompanying illustrations.
Dimension Intake Exhaust
A
Seat Angle Şşǚ Şşǚ
B
Seat Taper 30° 30°
C
Guide Depth ŞǯśȱȱǻŖǯřřŚȱǯǼ ŞǯśȱȱǻŖǯřřŚȱǯǼ
D
Guide I.D. ŝǯŖřŞȦŝǯŖśŞȱȱǻŖǯŘŝŝŗȦŖǯŘŝŝşȱǯǼ ŝǯŖřŞȦŝǯŖśŞȱȱǻŖǯŘŝŝŗȦŖǯŘŝŝşȱǯǼ
E
ȱȱ řŞǯŜŘśȦřŞǯŜŞśȱȱǻŗǯśŘŖŜȦŗǯśŘřŖȱǯǼ řŗǯŜŘśȦřŗǯŞŘśȱȱǻŗǯŘŚśŖȦŗǯŘśŚşȱǯǼ
F
Valve Face Angle 45° 45°
G
Valve Margin (Min.) 1.0 mm (0.0393 in.) 1.0 mm (0.0393 in.)
H
Valve Stem Diameter ŜǯşŞŘȦŝǯŖŖŖȱȱǻŖǯŘŝŚşȦŖǯŘŝśŜȱǯǼ ŜǯşŝŖȦŜǯşŞŞȱȱǻŖǯŘŝŚŚȦŖǯŘŝśŗȱǯǼ