46
Disassembly/Inspection and Service
KohlerEngines.com
24 690 34 Rev. D
Disassemble Cylinder Heads
NOTE: These engines use valve stem seals on intake
valves. Use a new seal whenever valve is
removed or if seal is deteriorated in any way.
Never reuse an old seal.
1. Remove screws, rocker arm pivots and rocker arms
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 retainers.
●
Valve springs.
●
Valve spring caps.
●
Intake and exhaust valves (mark position).
●
Valve stem seals (intake valve only).
4. Repeat above procedure for other cylinder head. Do
not interchange parts from one cylinder head to
other.
Inspection and Service
Valve Details
EXHAUST VALVE
INTAKE VALVE
EXHAUST
INSERT
INTAKE
INSERT
H
H
G
G
E
E
F
F
A
A
C
D
D
B
B
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.)
