50 SEBU8191-01
Maintenance Section
Cooling System Coolant - Change
•
The oil has ente
red the cooling system and the
coolant is contaminated.
•
The fuel has en
tered the cooling system and the
coolant is contaminated.
Note: When th
e cooling system is cleaned, only
clean water is needed when the inhibitor is drained
and replaced.
Note: Inspect the water pumps and the water
temperature regulators after the cooling system has
been draine
d. This is a good opportunity to replace
the water pumps, the water temperature regulators,
and the hoses, if necessary.
Drain
Pressurized System: Hot coolant can cause seri-
ous burns. To open the cooling system filler cap,
stop the e
ngine and wait until the cooling system
components are cool. Loosen the cooling system
pressure cap slowly in order to relieve the pres-
sure.
g01211179
Illu
stration 41
Typical e xample
1. Stop the engine and allow the engine to cool.
Loosen the cooling system filler cap (1) slowly in
ord
er to relieve any pressure. Remove the cooling
system filler cap.
g01211160
Illustration 42
Typ ical example
2. Open the drain cock or remove the drain p lug (2)
in the cylinder block.
3. Open the drain cock or remove the drain plug on
the radiator.
g0121
1161
Illustration 43
Typ ical example
4. Open
the drain cocks or remove the drain plugs
(3) in the oil coolers.
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