Kohler Command PRO CS Service Manual page 118

Section 10
Internal Components
Cylinder Head and Valves
Inspection and Service
Carefully inspect the valve mechanism parts. Inspect the valve springs and related hardware for excessive wear
or distortion. Check the valves and valve seat area for evidence of deep pitting, cracks, or distortion. Check
clearance of the valve stems in guides. See Figure 10-10 for valve details and specifications.
D
A
E
Figure 10-10. Valve and Valve Seat Measuring Locations.
CS4, CS6 Valve Specifications
Dimension
A Head Diameter (CS4)
Head Diameter (CS6)
Stem Diameter
B
C Length (CS4)
Length (CS6)
Face/Seat Width
D
Face/Seat Limit
E Face/Seat Angle (Insert Area)
Valve Stem Bend Limit
Valve Guide
Guide Inside Diameter
Stem to Guide Clearance
Valve Clearance
Valve Seat Contact Width
Std.
Limit
10.6
C
B
21.0 mm (0.83 in.)
24.0 mm (0.94 in.)
5.5 mm (0.22 in.)
64.5 mm (2.54 in.)
65.9 mm (2.59 in.)
0.7 mm (0.0276 in.)
1.7 mm (0.067 in.)
90°
0.01 mm (0.0004 in.)
5.5 mm (0.22 in.)
0.04/0.06 mm (0.0016/0.002 in.)
0.1 mm (0.004 in.)
0.7 mm (0.03 in.)
1.7 mm (0.067 in.)
D
Intake
19.0 mm (0.75 in.)
22.0 mm (0.87 in.)
5.5 mm (0.22 in.)
64.5 mm (2.54 in.)
64.5 mm (2.54 in.)
0.7 mm (0.0276 in.)
1.7 mm (0.067 in.)
90°
0.01 mm (0.0004 in.)
5.5 mm (0.22 in.)
0.06/0.08 mm (0.002/0.003 in.)
0.1 mm (0.004 in.)
0.7 mm (0.03 in.)
1.7 mm (0.067 in.)
D
Exhaust