Chrysler Stratus LHD 1997, Интерактивное электронное руководство по эксплуатации

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The thermostat is operated by a wax filled con-
tainer (pellet) which is sealed so that when heated to
a predetermined temperature. The wax expands
enough to overcome the closing spring and water
pump pressure, which forces the valve to open. Cool-
ant leakage into the pellet will cause a thermostat to
fail open. Do not attempt to free up a thermostat
with a screwdriver.
COOLANT PERFORMANCE
Performance is measurable. For heat transfer pure
water absorbs 1 btu for each degree of temperature
rise for each pound of water. This formula is altered
when necessary additives to control boiling, freezing,
and corrosion are added as follows:
•
Pure Water (1 btu) boils at 100°C (212°F) and
freezes at 0°C (32°F).
•
100 Percent ethylene glycol (.7 btu) can cause an
engine to run hot, cause detonation, and will freeze
at -22°C (-8°F).
•
50/50 Ethylene Glycol and Distilled Water (.82
btu) is the recommended combination that provides a
freeze point of -37°C (-35°F). The radiator, water
pump, engine water jacket, radiator pressure cap,
thermostat, temperature gauge, coolant sensor and
heater are all designed for 50/50 ethylene glycol.
Where required, a 56 percent glycol and 44 percent
water mixture will provide a freeze point of -46°C
(-50°F).
NOTE: Richer mixtures cannot be measured with
field equipment and can lead to problems associ-
ated with 100 percent glycol. If there is doubt that
the coolant mixture is to rich for field equipment to
measure, put a sample in a clean container. Add
exactly the same amount of water and retest. If the
coolant in the vehicle is 100% antifreeze, the diluted
sample will read 50%. If the coolant in the vehicle
was 70% antifreeze and 30% water, the diluted sam-
ple will read as 35%, etc.
SELECTION AND ADDITIVES
The use of aluminum cylinder heads, intake mani-
folds, and water pumps requires special corrosion
protection. Mopar Antifreeze or their equivalent are
recommended for best engine cooling without corro-
sion. When mixed only to a freeze point of -37°C
(-35°F) to -59°C (-50°F). If it looses color or becomes
contaminated, drain, flush, and replace with fresh
properly mixed solution.
CAUTION: Do not use well water, or suspected
water supply in cooling system. A 50/50 ethylene
glycol and distilled water mix is recommended.
COOLING SYSTEM PRESSURE CAP
The cooling system is equipped with a pressure cap
that releases built up pressure, maintaining a range
of 97-124 kPa (14-18 psi).
The cooling system will operate at higher than
atmospheric pressure. The higher pressure raises the
coolant boiling point thus, allowing increased radia-
tor cooling capacity.
There is also a vent valve in the center of the cap.
This valve also opens when coolant is cooling and
contracting allowing coolant to return to radiator
from coolant reserve system tank by vacuum through
connecting hose. If valve is stuck shut, the radia-
tor hoses will be collapsed on cool down. Clean
the vent valve (Fig. 15) to ensure proper sealing
when boiling point is reached.
The gasket in the cap seals the filler neck, so that
vacuum can be maintained, allowing coolant to be
drawn back into the radiator from the reserve tank.
RADIATOR HOSES AND CLAMPS
WARNING: IF VEHICLE HAS BEEN RUN
RECENTLY, WAIT 15 MINUTES BEFORE WORKING
ON VEHICLE. RELIEVE PRESSURE BY PLACING A
SHOP TOWEL OVER THE CAP AND WITHOUT
PUSHING DOWN ROTATE IT COUNTERCLOCKWISE
TO THE FIRST STOP. ALLOW FLUIDS TO ESCAPE
THROUGH THE OVERFLOW TUBE AND WHEN THE
SYSTEM STOPS PUSHING OUT COOLANT AND
STEAM AND THE PRESSURE DROPS CONTINUE
SERVICE.
WARNING: CONSTANT TENSION HOSE CLAMPS
ARE USED ON MOST COOLING SYSTEM HOSES.
WHEN REMOVING OR INSTALLING, USE ONLY
TOOLS DESIGNED FOR SERVICING THIS TYPE OF
CLAM. ALWAYS WEAR SAFETY GLASSES WHEN
SERVICING CONSTANT TENSION CLAMPS.
Fig. 15 Cooling System Pressure Cap
OVERFLOW NIPPLE MAIN SPRING GASKET RETAINER STAINLESS-STEEL SWIVEL TOP RUBBER SEALS VENT VALVE THERMOSTAT HOUSING/ENGINE OUTLET CONNEC- TOR FILLER NECK
7 - 8 COOLING SYSTEM
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DESCRIPTION AND OPERATION (Continued)