Mitsubishi Lancer. Manual — part 265

THERMOSTAT

ENGINE COOLING

14-26

>>B<< RADIATOR LOWER HOSE
CONNECTION

AC200642

Mating marks

Projection

Cooling water inlet
hose fitting

AH

1. Insert radiator lower hose as far as the projection

of the Cooling water inlet hose fitting.

2. Align the mating marks on the radiator lower hose

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

INSPECTION

M1141002500427

THERMOSTAT CHECK

ACX00400AB

1. Immerse the thermostat in water, and heat the

water while stirring. Check the thermostat valve
opening temperature.

Standard value:

88

± 1.5° C <4G1>

82

± 1.5° C <4G6>

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:

100

° C <4G1>

95

° C <4G6>

Amount of valve lift: 8.5 mm or more

WATER PUMP

ENGINE COOLING

14-27

WATER PUMP

REMOVAL AND INSTALLATION <4G1>

M1141002700421

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

P.14-21

).

• Valve Timing Belt Removal and Installation (Refer to

GROUP 11A

P.11A-33

).

AC303372

24 ± 3 N·m

23 ± 2 N·m

14 ± 1 N·m

1

2

Bolt specifications

Screw diameter × length mm

8 × 50

8 × 30

8 × 25

AB

2

2

Sealant: Mitsubishi Genuine Part
No. MD970389 or equivalent

Removal steps

1.

Alternator adjusting brace

>>

A

<<

2.

Water pump assembly

INSTALLATION SERVICE POINT
>>A<< WATER PUMP ASSEMBLY
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 water pump
assembly. Do not apply the sealant in an area
more than the required.

WATER PUMP

ENGINE COOLING

14-28

REMOVAL AND INSTALLATION <4G6>

M1141002700432

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

P.14-21

).

• Valve Timing Belt and Balancer Timing Belt Removal and

Installation (Refer to GROUP 11C

P.11C-35

).

AC301467

22 ± 4 N·m

23 ± 3 N·m

14 ± 1 N·m

1

2

3

4

N

N

Bolt specifications

Screw diameter × length mm

8 × 70

8 × 22

8 × 14

8 × 22

8 × 25

2

AB

Removal steps

1.

Alternator adjusting brace

2.

Water pump assembly

3.

Water pump gasket

>>

A

<<

4.

Cooling water line O-ring

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

AC103005

Water pump assembly

Cooling water
line O-ring

Water pump inlet pipe

AF

Fit the cooling water line O-ring to the groove in the
water pump inlet pipe. Then lubricate the cooling
water line O-ring and the inside of the water pump
assembly with water, and then insert the water pump
inlet pipe to the water pump assembly.

WATER HOSE AND WATER PIPE

ENGINE COOLING

14-29

WATER HOSE AND WATER PIPE

REMOVAL AND INSTALLATION <4G1>

M1141003300415

Pre-removal and Post-installation Operation
• Under Cover Removal and Installation

• 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

).

AC203411

1

2

3

4

5

6

7

8

10

9

13 ± 2 N·m

23 ± 4 N·m

13 ± 2 N·m

N

N

AC

11

12

13

N

Removal steps

1.

Water temperature sensor unit
connector

2.

Water temperature gauge unit
connector

3.

Control wiring harness and harness
bracket

<<

A

>>

>>

B

<<

4.

Radiator upper hose connection

5.

Throttle body water feed hose

6.

Thermostat case assembly

7.

Thermostat case gasket

>>

A

<<

8.

Cooling water line O-ring

9.

Control wiring harness clamp

10. Throttle body water return hose
11. Heater water hose connection
12. Water pump inlet pipe

>>

A

<<

13. Cooling water line O-ring

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.