General Information - Chrysler 1998 Voyager Service Manual

7 - 2 COOLING SYSTEM
GENERAL INFORMATION (Continued)
COOLING SYSTEM
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, cool-
ing 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 radia-
tor.
Fig. 1 Cooling System Operation 2.4L and 3.3/3.8L Engines
Fig. 2 Cooling System Operation 3.0L Engine
Its primary purpose is to maintain engine temper-
ature in a range that will provide satisfactory engine
performance and emission levels under all expected
driving conditions. It also provides hot water (cool-
ant) 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 2.4L and 3.3/3.8L engines
are shown in (Fig. 1), and 3.0L engine coolant rout-
ing is shown in (Fig. 2)
NS