58
Disassembly/Inspection and Service
KohlerEngines.com 32 690 01 Rev. G
2. Mark location of push rods as either intake or
exhaust and cylinder 1 or 2. Push rods should
always be installed in same positions.
3. Remove screws securing each cylinder head.
Discard screws once removed. Do not reuse.
4. Remove cylinder head and head gasket.
Disassemble Cylinder Heads
NOTE: On engines with valve stem seals on intake
valves; use a new seal whenever valve is
removed or if seal is deteriorated or damaged.
Never reuse an old seal.
1. Remove adjusters, pivots, rocker arms, studs, and
guide plate with adjusters from cylinder head.
2. Compress valve springs using a valve spring
compressor.
3. Once valve spring is compressed, remove following
items.
● Valve spring keepers.
● Valve spring caps.
● Valve springs.
● Valve spring retainers (only used on cylinder heads
without cast in valve spring retainers).
● Intake and exhaust valves (mark position).
● Valve stem seal (intake valve some models).
● Washer (intake valve only used on cylinder heads
with cast in valve spring retainers).
4. Repeat above procedure for other cylinder head. Do
not interchange parts from 1 cylinder head to
another.
Inspection and Service
Valve Details
H
E
F
A
C
D
F
E
G
A
H
D
A
B
B
G
Intake Valve
Exhaust Valve
Intake Insert
Exhaust Insert
Dimension Intake Exhaust
A Seat Angle 89° 89°
B Insert O.D. 36.987/37.013 mm (1.4562/1.4572 in.) 32.987/33.013 mm (1.2987/1.2997 in.)
C Guide Depth 4 mm (0.1575 in.) 6.5 mm (0.2559 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 33.37/33.63 mm (1.3138/1.3240 in.) 29.37/29.63 mm (1.1563/1.1665 in.)
F Valve Face Angle 45° 45°
G Valve Margin (Min.) 1.5 mm (0.0591 in.) 1.5 mm (0.0591 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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