Mitsubishi Colt Ralliart. Manual - part 107

THERMOSTAT

ENGINE COOLING

14-10

THERMOSTAT

REMOVAL AND INSTALLATION

M1141002400732

<4A9>

Pre-removal Operation
• Engine Coolant Draining (Refer to 

P.14-4

).

• Alternator Assembly Removal (Refer to GROUP 16, 

Charging System 

− Alternator Assembly 

P.16-13

).

Post-installation Operation
• Alternator Assembly Installation (Refer to GROUP 16, 

Charging System 

− Alternator Assembly 

P.16-13

).

• Engine Coolant Refilling (Refer to 

P.14-4

).

AC402405AB

1

3

4

5

8.4 ± 0.6 N·m

2

N

Removal steps 

<<

A

>>

>>

B

<<

1.

Radiator lower hose connection

<<

A

>>

>>

B

<<

2.

Hose clip

3.

Control harness connection

4.

Cooling water inlet hose fitting

>>

A

<<

5.

Thermostat

Removal steps (Continued)

Main

Index

Group

TOC

THERMOSTAT

ENGINE COOLING

14-11

<4G1>

Pre-removal Operation
• Front Under Cover Panel Removal (Refer to GROUP 51, 

Front Bumper Assembly and Radiator Grille 

P.51-2

).

• Engine Coolant Draining (Refer to 

P.14-6

).

• Air Hose A Removal (Refer to GROUP 15, Intercooler 

P.15-8

).

Post-installation Operation
• Air Hose A Installation (Refer to GROUP 15, Intercooler 

P.15-8

).

• Engine Coolant Refilling (Refer to 

P.14-6

).

• Front Under Cover Panel Installation (Refer to GROUP 

51, Front Bumper Assembly and Radiator Grille 

P.51-2

).

AC402115AB

1

22 ± 4 N·m

4

3

2

N

Removal steps 

<<

A

>>

>>

B

<<

1.

Radiator lower hose connection

<<

A

>>

>>

B

<<

2.

Hose clip

3.

Cooling water inlet hose fitting

>>

A

<<

4.

Thermostat

Removal steps (Continued)

Main

Index

Group

TOC

THERMOSTAT

ENGINE COOLING

14-12

REMOVAL SERVICE POINT
<<A>> RADIATOR LOWER HOSE/HOSE 
CLIP DISCONNECTION

AC209237 AB

Hose clip

Claw (Tip)

Break off the tip of hose clip claw and spread out the 
hose clip, then disconnect the radiator lower hose.
NOTE: If there is a hose clip claw, the hose clip can-
not spread to capacity because the claw contacts the 
hose clip.

INSTALLATION SERVICE POINTS
>>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.

AC005977AB

Rubber ring

Jiggle valve

Install the thermostat so that the jiggle valve is facing 
straight up. Be careful not to fold or scratch the rub-
ber ring.

>>B<< HOSE CLIP/RADIATOR LOWER 
HOSE CONNECTION

CAUTION

Never reuse the hose clip whose claw is broken 
off to prevent the rusting.
1. Insert a new hose clip into the radiator lower hose.
2. Insert the radiator lower hose until the protrusion 

of the cooling water inlet fitting.

3. Remove the hose clip claw and shorten the hose 

clip, then install the radiator lower hose.

INSPECTION

M1141002500591

THERMOSTAT CHECK

ACX00400AB

1. Immerse the thermostat in water, and heat the 

water while stirring. Check the thermostat valve 
opening temperature.

Standard value: Valve opening temperature:

<4A9> 82 

± 2°C

<4G1> 82 

± 1.5°C

ACX00401AC

Valve lift

2. Check that the amount of valve lift is at the 

standard value when the water is at the 
full-opening temperature.
NOTE: Measure the valve height when the ther-
mostat is fully closed, and use this measurement 
to compare the valve height when the thermostat 
is fully open.

Standard value:

Full-opening temperature: 95

°C

Amount of valve lift:

<4A9> 8 mm or more
<4G1> 8.5 mm or more

Main

Index

Group

TOC

WATER PUMP

ENGINE COOLING

14-13

WATER PUMP

REMOVAL AND INSTALLATION <4A9>

M1141002700830

Pre-removal Operation
• Engine Coolant Draining (Refer to 

P.14-4

).

• Side Under Cover Panel (RH) Removal

• Splash Shield Removal (Refer to GROUP 42, Fender 

P.42-7

).

• Drive Belt Removal (Refer to GROUP 11A, Crankshaft 

Pulley 

P.11A-14

).

Post installation Operation
• Drive Belt Installation (Refer to GROUP 11A, Crankshaft 

Pulley 

P.11A-14

).

• Drive Belt Tension Check and Adjustment (Refer to 

GROUP 11A, On-vehicle Service 

− Drive Belt Tension 

Check and Adjustment 

P.11A-6

).

• Engine Coolant Refilling (Refer to 

P.14-4

).

• Splash Shield Installation (Refer to GROUP 42, Fender 

P.42-7

).

• Side Under Cover Panel (RH) Installation

AC402406AB

8.4 ± 0.6 N·m

8.4 ± 0.6 N·m

1

2

3

N

Removal steps 

1.

Water pump pulley

2.

Water pump

3.

O-ring

Removal steps (Continued)

Main

Index

Group

TOC