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2004 ENGINE
Engine Cooling - Endeavor
GENERAL DESCRIPTION The cooling system is designed to keep every part of the engine at appropriate
temperature in whatever condition the engine may be operated. The cooling method
is of the water-cooled, pressure forced circulation type in which the water pump
pressurizes coolant and circulates it throughout the engine. If the coolant
temperature exceeds the prescribed temperature, the thermostat opens to circulate
the coolant through the radiator as well so that the heat absorbed by the coolant may
be radiated into the air. The water pump is of the centrifugal type and is driven by
the drive belt from the crankshaft. The radiator is the corrugated fin, down flow
type. CONSTRUCTION DIAGRAM Fig. 1: Identifying Engine Cooling Construction Diagram
2004 Mitsubishi Endeavor Limited 2004 ENGINE Engine Cooling - Endeavor
2004 Mitsubishi Endeavor Limited 2004 ENGINE Engine Cooling - Endeavor
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Courtesy of MITSUBISHI MOTOR SALES OF AMERICA
.
SPECIAL TOOLS Fig. 2: Identifying Engine Cooling Special Tools
Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
ENGINE COOLING DIAGNOSIS INTRODUCTION The system cools the engine so that it does not over-heat and maintains the engine
at an optimum temperature. The system components are the radiator, water pump,
thermostat, condenser fan assembly. Possible faults include low coolant,
contamination, belt loosening and component damage. TROUBLESHOOTING STRATEG
Y
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Use these steps to plan your diagnostic strategy. If you follow them carefully, you
will be sure to find most of the engine cooling faults.
1. Gather information from the customer.
2. Verify that the condition described by the customer exists.
3. Find and repair the malfunction by following the SYMPTOM CHART.
4. Verify that the malfunction is eliminated. SYMPTOM CHART SYMPTOM INSPECTION PROCEDURE CHART SYMPTOM PROCEDURES INSPECTION PROCEDURE 1: Coolant Leak DIAGNOSIS
STEP 1. Check for coolant leaks
.
SYMPTOM
INSPECTION
PROCEDURE
REFERENCE PAGE
Coolant Leak
1
INSPECTION PROCEDURE 1:
Coolant Leak
Engine Overheating
2
INSPECTION PROCEDURE 2:
Engine Overheating
Radiator Fan and
Condenser Fan do not
Operate
3
INSPECTION PROCEDURE 3:
RADIATOR FAN AND
CONDENSER FAN DO NOT
OPERATE
Radiator Fan and
Condenser Fan do not
Change Speed or Stop
4
INSPECTION PROCEDURE 4:
RADIATOR FAN AND
CONDENSER FAN DO NOT CHANGE SPEED OR STOP
Radiator Fan does not
Operate
5
INSPECTION PROCEDURE 5: Radiator Fan does not Operate
Condenser Fan does
not Operate
6
INSPECTION PROCEDURE 6: Condenser Fan does not Operate
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Check that the coolant level is up to the filler neck. Install a radiator tester and
apply 160 kPa (23 psi) pressure, and then check for leakage from the radiator
hose or connections.
WARNING:When pressure testing the cooling system,
slowly release cooling system pressure to avoid
getting burned by hot coolant.
CAUTION:
Be sure to completely clean away any
moisture from the places checked. When the tester is removed, be careful not to
spill any coolant. When installing and removing the tester and
when testing, be careful not to deform the
filler neck of the radiator.
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Fig. 3: Checking For Leakage From Radiator Hose Or Connections
Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
Q: Is leakage present from the radiator hose or connections?
YES: Repair or replace the appropriate part, then go to Step 2.
NO: There is no action to be taken.
STEP 2. Retest the system.
Q: It there still coolant leakage?
YES: Return to Step 1 .
NO: The procedure is complete.
INSPECTION PROCEDURE 2: Engine Overheating
2004 Mitsubishi Endeavor Limited 2004 ENGINE Engine Cooling - Endeavor