Mitsubishi Lancer. Manual - part 266

WATER HOSE AND WATER PIPE

ENGINE COOLING

14-30

INSTALLATION SERVICE POINTS
>>A<< COOLING WATER LINE O-RING 
INSTALLATION

AC200644 AD

Cooling water
line O-ring

Water pump inlet pipe

Water pump or thermostat case

CAUTION

Do not allow engine oil or other grease to adhere 
to the O-ring
Insert the cooling water line O-ring to the water pump 
inlet pipe, and coat the outer portion of the cooling 
water line O-ring with water or engine coolant.

>>B<< RADIATOR UPPER HOSE 
CONNECTION

AC200642

Mating marks

Projection

Thermostat case assembly

AI

Radiator upper
hose

1. Insert radiator upper hose as far as the projection 

of the thermostat case assembly.

2. Align the mating marks on the radiator upper hose 

and hose clamp, and then connect the radiator 
upper hose.

WATER HOSE AND WATER PIPE

ENGINE COOLING

14-31

REMOVAL AND INSTALLATION <4G6>

M1141003300426

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

P.14-21

).

• Air Cleaner Assembly Removal and Installation (Refer to 

GROUP 15 

P.15-3

).

• Thermostat Removal and Installation (Refer to 

P.14-24

).

AC303471

1

2

3

4

5

6

7

8

9

9

13 ± 2 N·m

23 ± 4 N·m

13 ± 2 N·m

N

N

AB

2

Sealant: Mitsubishi Genuine Part No. MD970389 or equivalent

Ø3 mm

Ø3 mm

5

Removal steps 

<<

A

>>

>>

C

<<

1.

Radiator upper hose connection

>>

B

<<

2.

Cooling water outlet hose fitting

3.

Throttle body water return hose

4.

Throttle body water feed hose

>>

B

<<

5.

Thermostat case assembly

6.

Heater water hose connection

7.

Control wiring harness clamp

8.

Water pump inlet pipe

>>

A

<<

9.

Cooling water line O-ring

Removal steps (Continued)

WATER HOSE AND WATER PIPE

ENGINE COOLING

14-32

REMOVAL SERVICE POINT
<<A>> RADIATOR UPPER HOSE DISCON-
NECTION

AC200641AC

Mating marks

After making mating marks on the radiator upper 
hose and hose clamp, disconnect the radiator upper 
hose.

INSTALLATION SERVICE POINTS
>>A<< COOLING WATER LINE O-RING 
INSTALLATION

AC200644 AC

O-ring

Water inlet pipe

Water pump or thermostat case

CAUTION

Do not allow engine oil or other grease to adhere 
to the cooling water line O-ring
Insert the cooling water line O-ring to the water pump 
water inlet pipe, and coat the outer portion of the 
cooling water line O-ring with water or engine cool-
ant.

>>B<< THERMOSTAT CASE 
ASSEMBLY/COOLING WATER OUTLET 
HOSE FITTING INSTALLATION

1. Use a gasket scraper or wire brush to completely 

eliminate all gasket material on the gasket 
mounting surface.

2. Apply a bead of the specified sealant.

Specified Sealant: MITSUBISHI GENUINE 
PART No.MD970389 or equivalent

3. With the sealant still wet (within 15 minutes after 

the sealant is applied), install the thermostat case 
assembly or cooling water outlet hose fitting. Do 
not apply the sealant in an area more than the 
required.

>>C<< RADIATOR UPPER HOSE 
CONNECTION

AC200642

Mating marks

Projection

Cooling water outlet
hose fitting

AJ

Radiator upper
hose

1. Insert radiator upper hose as far as the projection 

of the cooling water outlet hose fitting.

2. Align the mating marks on the radiator upper hose 

and hose clamp, and then connect the radiator 
upper hose.

INSPECTION

M1141003400296

WATER PUMP INLET PIPE AND 
THROTTLE BODY WATER HOSES 
CHECK

Check the water pipe and hoses for cracks, damage 
and clogs. Replace them if necessary.

RADIATOR

ENGINE COOLING

14-33

RADIATOR

REMOVAL AND INSTALLATION <4G1>

M1141001501160

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

P.14-21

).

• Air Cleaner Assembly Removal and Installation (Refer to 

GROUP 15 

P.15-3

).

AC303472

18

17

15

20

12

9

13

5

2

9

3

4

1

10

6

10

AC

12 ± 2 N·m

12 ± 2 N·m

7

<Vehicles without A/C>