Kohler 27EFOZ, Service Manual

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TP-5936 7/04 13 Section 5 Cooling System
Section 5 Cooling System
5.1 General
The heat exchanger cooling system consists of a heat
exchanger with a coolant recovery tank, a thermostat, a
rubber impeller seawater pump, a centrifugal-type
engine circulating pump, a water-cooled exhaust
manifold, and an exhaust mixer. See Figure 5-1 for
cooling system components.
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.
WARNING
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.
Note: 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.
Seawater
Coolant/Antifreeze
1
2
3
4
5
6
7
8
9
10
11
12
1. Engine block
2. Exhaust manifold
3. Exhaust mixer elbow
4. Outlet flapper
5. Silencer
6. Thermostat 7. Heat exchanger
8. Engine seawater pump
9. Seawater strainer
10. Seacock
11. Intake strainer
12. Engine-driven water pump
60531099
Figure 5-1 Cooling System Components