Disassembly/Inspection and Service
4762 690 02 Rev. D KohlerEngines.com
Disassemble Cylinder Heads
NOTE: These engines use valve stem seals on intake and exhaust valves. Use a new seal whenever valves are
removed, or if seal is deteriorated in any way. Never reuse an old seal.
1. Remove adjusters, rocker arm pivots, and rocker arms from cylinder head. Remove pivot studs and guide plate as
required.
2. Compress valve springs using a valve spring compressor.
3. Once valve spring is compressed, remove following items:
● Valve spring keepers.
● Valve spring retainers.
● Valve springs.
● Valve spring caps.
● Intake and exhaust valves (mark position).
● Valve stem seals.
4. Repeat above procedure for other cylinder head. Do not interchange parts from 1 cylinder head to another.
Inspection and Service
Valve Details
EXHAUST VALVE INTAKE VALVE
EXH
INT
H H
G G
E E
F F
A
C
D
D
B
Dimension Intake Exhaust
A Seat Angle 89° 89°
B Seat Taper 30° 30°
C Guide Depth 8.5 mm (0.334 in.) 8.5 mm (0.334 in.)
D Guide I.D. 7.038/7.058 mm (0.2771/0.2779 in.) 7.038/7.058 mm (0.2771/0.2779 in.)
E Valve Head Diameter 38.625/38.685 mm (1.5206/1.5230 in.) 31.625/31.825 mm (1.2450/1.2549 in.)
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 6.982/7.000 mm (0.2749/0.2756 in.) 6.970/6.988 mm (0.2744/0.2751 in.)
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