Chrysler New Yorker. Manual — part 40
COOLING
CONTENTS
page
page
GENERAL INFORMATION
ACCESSORY DRIVE BELTS . . . . . . . . . . . . . . . . 2
AUTOMATIC TRANSMISSION OIL COOLER . . . . 5
COOLANT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
COOLANT BOTTLE . . . . . . . . . . . . . . . . . . . . . . . 2
COOLANT PRESSURE BOTTLE CAP . . . . . . . . . 4
COOLING SYSTEM . . . . . . . . . . . . . . . . . . . . . . . 1
DUAL FAN MODULE . . . . . . . . . . . . . . . . . . . . . . 4
ENGINE BLOCK HEATER . . . . . . . . . . . . . . . . . . 5
ENGINE OIL COOLER—3.2L . . . . . . . . . . . . . . . 5
ENGINE THERMOSTAT . . . . . . . . . . . . . . . . . . . . 3
RADIATOR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
WATER PUMP . . . . . . . . . . . . . . . . . . . . . . . . . . 3
DESCRIPTION AND OPERATION
COOLANT PERFORMANCE . . . . . . . . . . . . . . . . . 6
ENGINE BLOCK HEATER . . . . . . . . . . . . . . . . . . 7
ENGINE THERMOSTAT . . . . . . . . . . . . . . . . . . . . 5
RADIATOR HOSES AND CLAMPS . . . . . . . . . . . 7
WATER PUMP . . . . . . . . . . . . . . . . . . . . . . . . . . 7
DIAGNOSIS AND TESTING
COOLING SYSTEM DIAGNOSIS . . . . . . . . . . . . . 8
DEAERATION . . . . . . . . . . . . . . . . . . . . . . . . . . 13
ELECTRIC FAN MOTOR . . . . . . . . . . . . . . . . . . 12
ENGINE BLOCK HEATER . . . . . . . . . . . . . . . . . 13
ENGINE THERMOSTAT . . . . . . . . . . . . . . . . . . . 12
LOW COOLANT LEVEL . . . . . . . . . . . . . . . . . . . 13
RADIATOR COOLANT FLOW . . . . . . . . . . . . . . 12
RADIATOR FAN CONTROL . . . . . . . . . . . . . . . . 12
TEMPERATURE GAUGE INDICATION . . . . . . . . 13
TESTING SYSTEM FOR LEAKS . . . . . . . . . . . . 12
WATER PUMP DIAGNOSIS . . . . . . . . . . . . . . . 12
SERVICE PROCEDURES
ADDING ADDITIONAL COOLANT . . . . . . . . . . . 13
COOLANT LEVEL CHECK . . . . . . . . . . . . . . . . . 13
COOLANT SERVICE . . . . . . . . . . . . . . . . . . . . . 13
COOLING SYSTEM—FILLING . . . . . . . . . . . . . 15
DRAINING COOLING SYSTEM . . . . . . . . . . . . . 14
REMOVAL AND INSTALLATION
ACCESSORY DRIVE BELT—2.7L . . . . . . . . . . . 24
ACCESSORY DRIVE BELT—3.2L . . . . . . . . . . . 24
AIR CONDITIONING BELT—2.7L . . . . . . . . . . . 22
AIR CONDITIONING BELT—3.2L ENGINE . . . . 24
COOLING FAN MODULE . . . . . . . . . . . . . . . . . . 21
ENGINE BLOCK HEATER . . . . . . . . . . . . . . . . . 22
RADIATOR . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
RADIATOR DRAINCOCK . . . . . . . . . . . . . . . . . . 21
THERMOSTAT—2.7L . . . . . . . . . . . . . . . . . . . . 19
THERMOSTAT—3.2L ENGINE . . . . . . . . . . . . . 19
WATER OUTLET CONNECTOR—2.7L . . . . . . . . 18
WATER PUMP—2.7L ENGINE . . . . . . . . . . . . . 17
WATER PUMP—3.2L ENGINE . . . . . . . . . . . . . 17
CLEANING AND INSPECTION
ACCESSORY DRIVE BELT . . . . . . . . . . . . . . . . . 25
CLEANING COOLING SYSTEM . . . . . . . . . . . . . 26
COOLANT BOTTLE PRESSURE CAP . . . . . . . . 26
REVERSE FLUSHING COOLING SYSTEM . . . . 26
WATER PUMP . . . . . . . . . . . . . . . . . . . . . . . . . 25
ADJUSTMENTS
BELT TENSION GAUGE METHOD . . . . . . . . . . . 27
SPECIFICATIONS
COOLING SYSTEM CAPACITY . . . . . . . . . . . . . 27
TORQUE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
SPECIAL TOOLS
COOLING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
GENERAL INFORMATION
COOLING SYSTEM
The cooling system consists of an engine cooling
module, pressure cap, coolant bottle, thermostat
(inlet), coolant, and a water pump to circulate the
coolant. The engine cooling module consist of a radi-
ator, electric fan motors, shroud, internal transmis-
sion oil cooler, internal engine oil cooler (if equipped),
air conditioning condenser, receiver drier, and a aux-
iliary transmission oil cooler (if equipped).
• 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.
300M
COOLING
7 - 1
• When Engine is warm: Thermostat is open, cool-
ant flows through the radiator, heater core, coolant
bottle and by-pass (no by-pass 2.7L).
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).
ACCESSORY DRIVE BELTS
The accessory drive system on 2.7L and 3.2L
engines utilizes two different belts. A conventional
V-belt drives the air conditioning compressor on 3.2L
engine; Poly-V belt on the 2.7L engine. The generator
and power steering pump on all engines are driven
by a Poly-V belt.
COOLANT BOTTLE
The coolant bottle consists of two chambers (Fig.
2). The pressure chamber keeps the coolant free of
trapped air, provides a volume for expansion and con-
traction, and provides a convenient and safe method
for checking and adjusting coolant level at atmo-
spheric pressure. It also provides some reserve cool-
ant to cover minor leaks, evaporation or boiling
losses. The overflow chamber allows coolant recovery
in case of an overheat. An overflow hose connects the
pressure chamber to the overflow chamber.
NOTE: Coolant will normally be in the pressure
chamber side of the coolant bottle. The overflow
chamber should normally be empty
Fig. 1 Cooling System Flow
Fig. 2 Coolant Pressure/Recovery Bottle
7 - 2
COOLING
LH
GENERAL INFORMATION (Continued)
Refer to Coolant Level Service, Pressure Cap sec-
tions for operation and service.
ENGINE THERMOSTAT
The thermostat on the 2.7L and 3.2L engines are
located on the lower left side of engine, near the
front (Fig. 3) and (Fig. 4). The thermostat on both
engines are on the inlet side of the water pump. The
thermostats have an air bleed located in the thermo-
stat flange.
WATER PUMP
WATER PUMP—2.7L ENGINE
The 2.7L pump has a die cast aluminum body and
a plastic swept vane impeller. It bolts directly to the
cylinder block, behind the timing chain cover (Fig. 5).
The water pump is driven by the back side of the
engine primary timing chain.
WATER PUMP—3.2L ENGINE
The 3.2L pump has a plastic swept vane impeller.
The housing bolts directly to the right rear timing
belt cover, using a O-ring gasket for pump to cover
sealing (Fig. 6). The pump is driven by the engine
timing belt.
COOLANT
CAUTION: Use of Propylene Glycol based coolants
is not recommended, as they provide less freeze
protection and less corrosion protection.
Fig. 3 Thermostat and Housing—2.7L Engine
Fig. 4 Thermostat and Housing—3.2L Engine
Fig. 5 Water Pump—2.7L Engine
Fig. 6 Water Pump—3.2L Engine
LH
COOLING
7 - 3
GENERAL INFORMATION (Continued)
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