Please note that it is the owner's responsibility to main-
tain the proper level of protection against freezing
according to the temperatures occurring in the area
where the vehicle is operated.
NOTE:
•
Mixing coolant types is not recommended and can
result in cooling system damage. If HOAT and OAT
coolant are mixed in an emergency, if the proper
OAT coolant is not available, add only water to the
cooling system, then have an authorized dealer
drain, flush, and refill with OAT coolant (conforming
to MS.90032) as soon as possible. Under no cir-
cumstances should HOAT coolant be added to the
cooling system.
•
Low pressure expansion bottles for power electron-
ics and battery cooling require a special tool for
removing the cap from the expansion bottle. For the
battery coolant bottle, it is important to not add
coolant if level is low. The vehicle should be taken to
an authorized dealer for proper servicing of the bat-
tery coolant loop if this should occur.
Cooling System Pressure Cap
The cap must be fully tightened to prevent loss of
engine coolant (antifreeze), and to ensure that engine
coolant will return to the radiator from the coolant
expansion bottle/recovery tank (if equipped).
The cap should be inspected and cleaned if there is any
accumulation of foreign material on the sealing
surfaces.
WARNING!
•
Do not open a hot engine cooling system. Never
add engine coolant (antifreeze) when the engine is
overheated. Do not loosen or remove the cap to
cool an overheated engine. Heat causes pressure
to build-up in the cooling system. To prevent scald-
ing or injury, do not remove the pressure cap while
the system is hot or under pressure.
•
Do not use a pressure cap other than the one
specified for your vehicle. Personal injury or engine
damage may result.
Disposal Of Used Coolant
Used ethylene glycol-based coolant (antifreeze) is a
regulated substance requiring proper disposal. Check
with your local authorities to determine the disposal
rules for your community. To prevent ingestion by ani-
mals or children, do not store ethylene glycol-based
coolant in open containers or allow it to remain in
puddles on the ground, clean up any ground spills
immediately. If ingested by a child or pet, seek emer-
gency assistance immediately.
Coolant Level
The coolant expansion bottle provides a quick visual
method for determining that the coolant level is
adequate. With the engine off and cold, the level of the
coolant (antifreeze) in the bottle should be between the
“MAX” and “MIN” lines marked on the bottle.
As long as the engine operating temperature is satisfac-
tory, the coolant bottle need only be checked once a
month.
When additional coolant is needed to maintain the
proper level, it should be added to the coolant bottle.
Do not overfill.
See an authorized dealer for service.
Cooling System Notes
NOTE:
When the vehicle is stopped after a few miles/
kilometers of operation, you may observe vapor coming
from the front of the engine compartment. This is nor-
mally a result of moisture from rain, snow, or high
humidity accumulating on the radiator and being vapor-
ized when the thermostat opens, allowing hot engine
coolant (antifreeze) to enter the radiator.
If an examination of the engine compartment shows no
evidence of radiator or hose leaks, the vehicle may be
safely driven. The vapor will soon dissipate.
•
Do not overfill the coolant expansion bottle.
•
Check the coolant freeze point in the radiator and in
the coolant expansion bottle. If engine coolant
needs to be added, the contents of the coolant
expansion bottle must also be protected against
freezing.
•
If frequent engine coolant additions are required,
the cooling system should be pressure tested for
leaks.
•
Maintain coolant concentration at a minimum of
50% OAT coolant (conforming to MS.90032) and
deionized, or distilled water.
•
Use only high purity water such as deionized, or dis-
tilled water when mixing the water/coolant solution
for the engine, battery or high voltage electronics
cooling systems. The use of lower quality water will
reduce the amount of corrosion protection in the
cooling system.
280 SERVICING AND MAINTENANCE
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