Chrysler Town & Country/Voyager, Dodge Caravan, Plymouth Voyager. Manual - part 180
COOLING SYSTEM
CONTENTS
page
page
ACCESSORY DRIVE BELTS . . . . . . . . . . . . . . . . 23
ENGINE BLOCK HEATER . . . . . . . . . . . . . . . . . . 27
GENERAL INFORMATION
. . . . . . . . . . . . . . . . . . 1
SERVICE PROCEDURES
. . . . . . . . . . . . . . . . . . 10
SPECIFICATIONS
. . . . . . . . . . . . . . . . . . . . . . . 29
GENERAL INFORMATION
COOLING SYSTEM
Throughout this group, references may be made to a
particular vehicle by letter or number designation. A
chart showing the breakdown of these designations is
included in the Introduction Section at the front of this
service manual.
The cooling system has a radiator, coolant, electric
fan motor, shroud, pressure cap, thermostat, coolant
reserve system, transmission oil cooler, a water pump
to circulate the coolant, hoses, and clamps to complete
the circuit.
• When Engine is cold: Thermostat is closed, cooling
system has no flow through the radiator. The coolant
bypass flows through the engine only.
• When Engine is warm: Thermostat is open, cooling
system has bypass flow and coolant flow through
radiator.
Its primary purpose is to maintain engine tempera-
ture in a range that will provide satisfactory engine
performance and emission levels under all expected
driving conditions. It also provides hot water (coolant)
for heater performance and cooling for automatic
transmission oil. 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.
Coolant flow circuits for 2.5L engine equipped ve-
hicles is shown in Figure 1. Figure 2 shows 3.0L engine
coolant routing. Figure 4 shows 3.3L Engine Coolant
routing.
Excluding heated intake manifold hose routing (hose
is routed from waterbox directly to heater), all other
system functions are essentially the same as shown for
standard engines.
Fig. 1 Cooling System Operation 2.5L Engines
.
COOLING SYSTEM
7 - 1