Chrysler 300M Service Manual page 188

LH
COOLING
DESCRIPTION - ENGINE COOLING SYSTEM
OPERATION - ENGINE COOLING SYSTEM
DIAGNOSIS AND TESTING
DIAGNOSIS AND TESTING - COOLING
SYSTEM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
DIAGNOSIS AND TESTING - COOLING
SYSTEM LEAK . . . . . . . . . . . . . . . . . . . . . . . . 6
DIAGNOSIS AND TESTING - COOLING
SYSTEM AERATION . . . . . . . . . . . . . . . . . . . . 7
DIAGNOSIS AND TESTING - COOLING
SYSTEM DEAERATION . . . . . . . . . . . . . . . . . . 7
STANDARD PROCEDURE
STANDARD PROCEDURE - COOLANT
LEVEL CHECK . . . . . . . . . . . . . . . . . . . . . . . . 7
COOLING
DESCRIPTION - ENGINE COOLING SYSTEM
The engine cooling system consists of a cooling
module, pressure cap, coolant bottle, thermostat
(inlet type), coolant, plumbing, and a water pump to
circulate the coolant (Fig. 1). The engine cooling mod-
ule consist of a radiator, electric radiator fan motors,
shroud, internal transmission oil cooler, internal
engine oil cooler (if equipped), air conditioning con-
denser, and a auxiliary transmission oil cooler (if
equipped).
OPERATION - ENGINE COOLING SYSTEM
CAUTION: The cooling system is designed to func-
tion with a 50/50 mixture of Mopar Antifreeze/Cool-
ant, 5 Year/100,000 Mile Formula (MS-9769) or
equivalent, and distilled water. Higher concentra-
tions may result in poor cooling performance and
premature water pump seal failure. This antifreeze/
coolant may not be mixed or substituted with any
other type.
COOLING
TABLE OF CONTENTS
page
STANDARD PROCEDURE - COOLING
. . 1 SYSTEM DRAINING . . . . . . . . . . . . . . . . . . . . 8
. . . . 1 STANDARD PROCEDURE - COOLING
SYSTEM FILLING . . . . . . . . . . . . . . . . . . . . . . 8
STANDARD PROCEDURE - ADDING
ADDITIONAL COOLANT . . . . . . . . . . . . . . . . . 11
SPECIFICATIONS
TORQUE
SPECIAL TOOLS
COOLING
ACCESSORY DRIVE
ENGINE
TRANSMISSION
• When Engine is cold: Thermostat is closed, cool-
ing system has no flow through the radiator. The
coolant flows through the engine, heater core, coolant
bottle and an internal engine by-pass.
• When Engine is warm: Thermostat is open, cool-
ant flows through the radiator, heater core, coolant
bottle and by-pass.
The cooling systems primary purpose is to main-
tain engine temperature in a range that will provide
satisfactory engine performance and emission levels
under all expected driving conditions. It also provides
hot coolant for heater, and cooling for automatic
transmission fluid. It does this by transferring heat
from engine metal to coolant, moving this heated
coolant to the radiator, and then transferring this
heat to the ambient air.
The coolant flow circuit is shown in (Fig. 1).
COOLING 7 - 1
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. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
. . . . . . . . . . . . . . . . . . . . . . . . . 38
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