Mitsubishi Montero (2004+). Manual - part 1148

COOLING FAN

TSB Revision

ENGINE COOLING

14-11

REMOVAL SERVICE POINT

.

<<A>> DRIVE BELT REMOVAL
The following operations will be needed due to the introduction 
of the serpentine drive system with the drive belt auto ten-
sioner.
1. Insert a 12.7 mm (1/2 inch) breaker bar into the square hole 

on the drive belt auto tensioner, and rotate it clockwise until 
the tensioner touches the stopper. 

2. Align hole B with hole A, and insert a 5.0 mm (0.20 inch) 

Allen wrench to hold the tensioner. Then loosen the drive 
belt, and then remove the drive belt auto tensioner. 

INSTALLATION SERVICE POINTS

.

>>A<< DRIVE BELT INSTALLATION
1. Install the drive belt auto tensioner with the Allen wrench 

inserted. 

2. After the drive belt has been installed, remove the Allen 

wrench while holding the drive belt auto tensioner with a 
socket wrench drive. Then release the drive belt auto 
tensioner slowly.

3. Check for proper tension. (Refer to GROUP 

00-Maintenance Service 

P.00-40

.)

.

ACX01424AB

HOLE A

HOLE B

SQUARE 

HOLE

CLOCKWISE

ALLEN WRENCH

ACX01376AB

ALLEN WRENCH

COOLING FAN

TSB Revision

ENGINE COOLING

14-12

>>B<< RADIATOR SHROUD UPPER COVER 
INSTALLATION
1. Install the covers securely until the click can be heard from 

the four fixing points.

2. Two lugs around the circumference of the covers should be 

seen on the outside of the shroud.

3. After installation, check that the covers are fixed securely.

INSPECTION

M1141002200103

.

Cooling Fan Check

• Check the blades for damage and cracks.

• Check for cracks and damage around bolt holes in the fan 

hub.

• If any portion of the fan is damaged or cracked, replace the 

cooling fan.

.

Fan Clutch Check

• Check to ensure that fluid in the fan clutch is not leaking at 

the case joint and seals. If fluid quantity decreases due to 
leakage, the fan speed will decrease and engine overheat-
ing might result.

• When the fan attached to the engine is turned by hand, it 

should have some resistance. If the fan turns lightly or 
freely with no resistance, it is faulty.

• Check the bimetal strip for damage.

ACX00404 AC

THERMOSTAT

TSB Revision

ENGINE COOLING

14-13

THERMOSTAT

REMOVAL AND INSTALLATION

M1141002400312

REMOVAL SERVICE POINT

.

<<A>> RADIATOR LOWER HOSE DISCONNECTION
Make mating marks on the radiator hose and the hose clamp. 
Disconnect the radiator hose.

Pre-removal and Post-installation Operation
• Engine Coolant Draining and Refilling (Refer to  

P.14-6

.)

• Intake Air Duct Removal and Installation (Refer to 

GROUP 15, Air Cleaner 

P.15-6

.)

AC204072

12 ± 1 N·m
102 ± 13 in-lb

1

2

3

AB

REMOVAL STEPS

<<A>> >>B<<

1.

RADIATOR LOWER HOSE 
CONNECTION

2.

WATER INLET FITTING

>>A<<

3.

THERMOSTAT

REMOVAL STEPS (Continued)

AC200641AB

MATING MARKS

THERMOSTAT

TSB Revision

ENGINE COOLING

14-14

INSTALLATION SERVICE POINT

.

>>A<< THERMOSTAT INSTALLATION

CAUTION

Make absolutely sure that no oil adheres to the rubber ring 
of the thermostat. Also do not fold or scratch the rubber 
ring during installation.
Install the thermostat so that the jiggle valve is facing straight 
up. Be careful not to fold or scratch the rubber ring.

.

>>B<< RADIATOR LOWER HOSE CONNECTION
1. Insert each hose as far as the projection of the water inlet 

fitting.

2. Align the mating marks on the radiator hose and hose 

clamp, and then connect the radiator hose.

INSPECTION

M1141002500308

.

Thermostat Check
1. Immerse the thermostat in water, and heat the water while 

stirring. Check the thermostat valve opening temperature.

Standard value:
Valve opening temperature: 82 

± 2°C (180 ± 36°F)

AC000279

JIGGLE VALVE

RUBBER RING

AB

AC200642

MATING
MARKS

PROJECTION

WATER OUTLET
FITTING

AB

ACX00400