Closed Heat Exchanger; Check And Fill Coolant; Flush And Clean Cooling System - Kohler 5E Service Manual

5.2 Closed Heat Exchanger

In a closed cooling system, the seawater circulates
through separate chambers within the heat exchanger
to cool the engine water. The seawater then mixes with
the engine exhaust and ejects out of the exhaust outlet.
The cooling capacity for the 5/7.3E and 4/6EF is 2.84 L
(3.0 qts.). The capacity of the recovery tank is an
additional 0.24 L (8.0 oz.).
WARNING
Hot coolant and steam.
Can cause severe injury or death.
Before removing the pressure cap,
stop the generator set and allow it to
cool. Then loosen the pressure cap
to relieve pressure.
Checking the coolant level. Hot coolant can cause severe
injury or death. Allow the engine to cool. Release pressure
from the cooling system before removing the pressure cap. To
release pressure, cover the pressure cap with a thick cloth and
then slowly turn the cap counterclockwise to the first stop.
Remove the cap after pressure has been completely released
and the engine has cooled. Check the coolant level at the tank
if the generator set has a coolant recovery tank.
NOTICE
Saltwater damage. Saltwater quickly deteriorates metals.
Wipe up saltwater on and around the generator set and
remove salt deposits from metal surfaces.

5.3 Check and Fill Coolant

Keep the coolant recovery tank approximately 1/4 full.
Before filling the cooling system, close all petcocks and
tighten all hose clamps. Use a solution of 50% ethylene
glycol and 50% clean, softened water to inhibit rust and
corrosion and to prevent freezing.
coolant mixture, as necessary, to the coolant recovery
tank. Periodically check the coolant level on closed
systems by removing the pressure cap. Do not rely
solely on the level in the coolant recovery tank. Add
fresh coolant until the level is just below the overflow
tube opening.
14 Section 5 Cooling System
Do not add coolant to a hot engine. Adding coolant to a
hot engine can cause the cylinder block or cylinder head
to crack. Wait until the engine has cooled.
Note: Coolant solution. A coolant solution of 50%
5.4 Flush and Clean Cooling
For optimum protection, drain, flush, and refill the
cooling system at the interval listed in the operation
manual's service schedule.
Pay special attention to the coolant level. Check the
coolant level as described earlier.
Flush and Clean Procedure
1. Remove the hose clamp at the coolant hose. See
2. Remove the pressure cap to simplify draining.
3. Drain, clean, and flush the coolant recovery tank.
4. Flush the system with clean water.
5. Replace the hose clamp to secure the coolant
6. Fill the cooling system with the recommended
Add additional
7. Bleed the air from the cooling system.
8. Replace the pressure cap.
ethylene glycol provides freezing protection to
--37_C (--34_F) and overheating protection to
129°C (265°F). A coolant solution with less than
50% ethylene glycol may not provide adequate
freezing and overheating protection. A coolant
solution with more than 50% ethylene glycol can
cause engine or component damage. Do not use
alcohol or methanol antifreeze or mix them with
the specified coolant.
manufacturer's operation manual for engine
coolant specifications.
System
Section 1 for location.
hose.
coolant.
Consult the engine
TP-5986 4/03