Kohler Comand Pro CH1000 Service Manual page 101

EXHAUST VALVE
E
F
G
H
Dimension
A Seat Angle
B Seat Taper
C Guide Depth
D Guide I.D.
E Valve Head Diameter
F Valve Face Angle
G Valve Margin (Min.)
H Valve Stem Diameter
Figure 9-6. Valve Details.
Hard starting or loss of power accompanied by high
fuel consumption may be symptoms of faulty valves.
Although these symptoms could also be att ributed to
worn rings, remove and check the valves fi rst. Aft er
removal, clean the valve heads, faces, and stems with
a power wire brush.
C
D
INT
EXH
D
Intake
89°
30°
8.5 mm (0.334 in.)
7.038/7.058 mm (0.2771/0.2779 in.)
38.625/38.685 mm (1.5206/1.5230 in.)
45°
1.0 mm (0.0393 in.)
6.982/7.000 mm (0.2749/0.2756 in.)
Inspection and Reconditioning
INTAKE VALVE
F
B A
89°
30°
8.5 mm (0.334 in.)
7.038/7.058 mm (0.2771/0.2779 in.)
31.625/31.825 mm (1.2450/1.2549 in.)
45°
1.0 mm (0.0393 in.)
6.970/6.988 mm (0.2744/0.2751 in.)
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.
Section 9
E
G
H
Exhaust
9
9.5