Chrysler Dodge Caravan 2002 Manual page 266

RS
ENGINE (Continued)
CONDITION
HEAT ODOR
POOR DRIVEABILITY
(THERMOSTAT POSSIBLY STUCK
OPEN). GAUGE MAY BE READING
LOW.
STEAM IS COMING FROM FRONT
OF VEHICLE NEAR GRILL AREA
WHEN WEATHER IS WET,
ENGINE WARMED UP AND
RUNNING WITH VEHICLE
STATIONARY, OR JUST SHUT
OFF. TEMPERATURE GAUGE IS
NORMAL.
POSSIBLE CAUSES
3. Obstructions in heater hose
fitting at engine or at heater core.
4. Heater hose kinked.
5. Water pump is not pumping
coolant to heater core.
6. Air trapped in heater core.
1. Various heat shields are used at
certain driveline components. One
or more of these shields may be
missing.
2. Temperature gauge reading
above the normal range.
3. Radiator fan operating
incorrectly.
4. Undercoating been applied to an
unnecessary component.
5. Engine may be running rich,
causing the catalytic converter to
overheat
1. The engine thermostat must be
operating correctly for proper
driveability, clean vehicle emissions,
and the prevention of sludge
buildup in the engine oil. Check for
a diagnostic trouble code.
1. During wet weather, moisture
(snow, ice, rain, or condensation)
on the radiator will evaporate when
the thermostat opens. The
thermostat opening allows heated
coolant into the radiator. When the
moisture contacts the hot radiator,
steam may be emitted. This usually
occurs in cold weather with no fan
or air flow to blow it away.
ENGINE
CORRECTION
3. Remove heater hoses at both
ends and check for obstructions.
Repair as necessary.
4. Locate kinked area and repair as
necessary.
5. When the engine is fully warmed
up, both heater hoses should be hot
to the touch. If only one of the
hoses is hot, the water pump may
not be operating correctly. Replace
components as necessary.
6. (Refer to 7 - COOLING -
DIAGNOSIS AND TESTING -
COOLING SYSTEM DEAERATION)
1. Locate missing shields and
replace or repair as necessary.
2. Refer to Gauge Is Reading High
in Temperature Gauge Indicatication
Diagnosis Chart.
3. (Refer to 7 - COOLING/ENGINE/
RADIATOR FAN - OPERATION)
Repair as necessary.
4. Clean undercoating as necessary.
5. (Refer to Appropriate Diagnostic
Information) Repair as necessary.
1. (Refer to Appropriate Diagnostic
Information) Replace thermostat, if
necessary.
1. Occasional steam emitting from
this area is normal. No repair is
necessary.
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