Cooling System; Closed Heat Exchanger; Checking And Filling Coolant - Kohler 14EKOZD Operation

3.9 Cooling System

3.9.1

Closed Heat Exchanger

In a closed cooling system, the seawater circulates through separate chambers within the heat exchanger or manifold to cool
the engine coolant. The seawater then mixes with the engine exhaust and ejects out of the exhaust outlet. See Figure 37 for
coolant capacities (include coolant recovery tank capacity of 0.24 L (8 oz.).
Model
14EKOZD and 12EFKOZD (1 and 3 Phase)
16EKOZD and 13.5EFKOZD (1 and 3 Phase)
21EKOZD and 18/17EFKOZD (1 and 3 Phase)
24EKOZD and 20.5EFKOZD (1 and 3 Phase)
32EKOZD and 28EFKOZD (1 and 3 Phase)
40EKOZD and 35EFKOZD (1 and 3 Phase)
Figure 37 Engine Block Coolant Capacities
Saltwater damage. Saltwater quickly deteriorates metals. Wipe up saltwater on and around the generator set and remove salt
deposits from metal surfaces.
Note:
A coolant solution of 50% ethylene glycol is required. This mix 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. Consult the engine manufacturer's operation manual
for engine coolant specifications.
Note:
Do not add coolant to an overheated engine. Adding coolant to a hot engine can cause the cylinder block or cylinder head to
crack. Wait until the engine has cooled.
Note:
Pay special attention to the coolant level. After the coolant drains, allow time when refilling the coolant for a complete refill of the
engine water jacket. Check the coolant level as prescribed in the Prestart Checklist.
3.9.2

Checking and Filling Coolant

WARNING
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.
Maintain the coolant level in the coolant recovery tank at 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/corrosion and prevent freezing. Add additional coolant solution, 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.
TP-7044 6/23
L (Qts.)
5.2 (5.5)
4.4 (4.6)
7.0 (7.4)
NOTICE
Hot coolant and steam.
Can cause severe injury or death.
Before removing the pressure cap, stop the engine and allow it to cool. Then loosen the
pressure cap to relieve pressure.
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