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SERVICING AND MAINTENANCE 393
COOLING SYSTEM
Coolant Checks
Check the engine, battery (if equipped), intercooler
(if equipped), and Motor Generator Unit (MGU) (if
equipped) coolant (antifreeze) protection every
12 months (before the onset of freezing weather,
where applicable). If the engine, battery (if
equipped), intercooler (if equipped), and MGU (if
equipped) coolant is dirty or rusty in appearance,
the system should be drained, flushed and refilled
with fresh OAT coolant (conforming to MS.90032)
by an authorized dealer. Check the front of the A/C
condenser (if equipped) or radiator for any
accumulation of bugs, leaves, etc. If dirty, clean by
gently spraying water from a garden hose vertically
down the face of the A/C condenser (if equipped)
or the back of the radiator core.
Check the engine, battery (if equipped), intercooler
(if equipped), and MGU (if equipped) cooling
system hoses for brittle rubber, cracking, tears,
cuts, and tightness of the connection at the
coolant recovery bottle and radiator. Inspect the
entire system for leaks. DO NOT REMOVE THE
COOLANT PRESSURE CAP WHEN THE COOLING
SYSTEM IS HOT.
Cooling System — Drain, Flush And Refill
NOTE:
Some vehicles require special tools to add coolant
properly. Failure to fill these systems properly
could lead to severe internal engine damage. If any
coolant is needed to be added to the system
please contact an authorized dealer.
If the engine coolant (antifreeze) is dirty or
contains visible sediment, have an authorized
dealer clean and flush with OAT coolant
(conforming to MS.90032).
For the proper maintenance intervals, see
Ú page 368 for gasoline engines or Ú page 373
for diesel engines.
Selection Of Coolant
For further information Ú page 449.
NOTE:
Mixing of engine coolant (antifreeze) other than
specified Organic Additive Technology (OAT)
engine coolant, may result in engine damage
and may decrease corrosion protection. OAT
engine coolant is different and should not be
mixed with Hybrid Organic Additive Technology
(HOAT) engine coolant or any “globally compat-
ible” coolant. If a non-OAT engine coolant is
introduced into the cooling system in an emer-
gency, the cooling system will need to be
drained, flushed, and refilled with fresh OAT
coolant (conforming to MS.90032), by an autho-
rized dealer as soon as possible.
Do not use water alone or alcohol-based engine
coolant (antifreeze) products. Do not use addi-
tional rust inhibitors or anti-rust products, as
they may not be compatible with the radiator
engine coolant and may plug the radiator.
This vehicle has not been designed for use with
propylene glycol-based engine coolant. Use of
propylene glycol-based engine coolant is not
recommended.
WARNING!
You or others can be badly burned by hot
engine coolant (antifreeze) or steam from your
radiator. If you see or hear steam coming from
under the hood, do not open the hood until the
radiator has had time to cool. Never open a
cooling system pressure cap when the radi-
ator or coolant bottle is hot.
Keep hands, tools, clothing, and jewelry away
from the radiator cooling fan when the hood is
raised. The fan starts automatically and may
start at any time, whether the engine is
running or not.
When working near the radiator cooling fan,
disconnect the fan motor lead or turn the igni-
tion to the OFF mode. The fan is temperature
controlled and can start at any time the igni-
tion is in the ON mode.
8
22_JL_OM_EN_USC_t.book Page 393
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