Kohler 4EOZ Service page 78

Figure 10-33 Protective Tube
Disassembly the valves
1. Use the special tool shown in Figure 10-34 to
disassemble the valves.
service manual.
Note: Be aware of the two thin steel washers located
under the intake valve spring.
Figure 10-34 Valve
66 Section 10 Generator and Engine Disassembly/Reassembly
Consult the engine
Replacing the valve guides
1. If valve guide replacement is necessary, use the
proper driver and press out the old guides from the
head. See Figure 10-35.
Figure 10-35 Valve Guide
Replacing the seats
The cylinder head is equipped with two valve ring seats
of wear-resistant steel. Consult the engine service
manual and the following procedure if the head seats
are so worn that a grinding valve rework will not ensure a
good gas proof. Use a valve seat cutter if a surface
rework is needed.
1. Insert the guide pin into the valve guide.
2. Rotate the cutting surface of the T-handled tool
applying light pressure to touch the ring seat. See
Figure 10-36.
Note: Do not cut too deep or use grinding compound.
Observe the allowable valve recess.
To check the sealing valves:
1. Put the sealing valves in their guides.
2. Install the springs and fill the intake/exhaust
openings on the head with a small amount of diesel
fuel oil.
3. A good valve seal occurs when the diesel fuel oil
leaks about 2 drops per minute.
TP-6137 5/03