Mitsubishi Galant. Manual - part 335

THERMOSTAT

TSB Revision

ENGINE COOLING

14-18

TH ER M O STAT

REMOVAL AND INSTALLATION

M1141002400066

REMOVAL SERVICE POINT

<<A>> RADIATOR LOWER HOSE DISCONNECTION
Place mating marks on the radiator lower hose and hose clamp 
before disconnection.

INSTALLATION SERVICE POINTS

>>A<< THERMOSTAT INSTALLATION

CAUTION

Make absolutely sure that no oil adheres to the rubber ring 
of the thermostat. Also be careful not to fold over or 
scratch the rubber ring when inserting.
Install the thermostat so that the jiggle valve is facing straight 
up, while being careful not to fold over 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.

Pre-removal and Post-installation Operation

•

Engine Coolant Draining and Supplying [Refer to GROUP 
00, Maintenance Service - Engine Coolant (Change)

P.00-

50

.]

•

Air Cleaner Removal and Installation (Refer to GROUP 
15, Air Cleaner

P.15-4

.)

AC000278

2

3

1

17 – 20 N·m
13 – 15 ft-lb

12 N·m
106 in-lb

1

2

3

AB

<2.4L ENGINE>

<3.0L ENGINE>

REMOVAL STEPS

<<A>>

>>B<<

1.

RADIATOR LOWER HOSE 
CONNECTION

2.

WATER INLET FITTING

>>A<<

3.

THERMOSTAT

REMOVAL STEPS (Continued)

AC000279

JIGGLE VALVE

RUBBER RING

AB

THERMOSTAT

TSB Revision

ENGINE COOLING

14-19

INSPECTION

M1141002500063

THERMOSTAT CHECK

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

stirring. Check the thermostat valve opening temperature.

Standard value: 88 

±±±±

 1.5 

°°°°

C (190 

±±±±

 3 

°°°°

F)

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 thermostat is 
fully closed, and use this measurement to calculate the 
valve height when the thermostat is fully open.

Standard value:

ITEMS

2.4L ENGINE

3.0L ENGINE

Full-opening 
temperature 

°

C (

°

F)

100 (212)

100 (212)

Amount of valve lift mm 
(in)

5.0 

−

 7.0 (0.20 

−

 0.28) or more

9.0 (0.35) 
or more

ACX00400

ACX00401AB

VALVE LIFT

WATER PUMP

TSB Revision

ENGINE COOLING

14-20

WATER  PU M P

REMOVAL AND INSTALLATION 

M1141002700078

<2.4L ENGINE>

Pre-removal and Post-installation Operation

•

Engine Coolant Draining and Supplying [Refer to GROUP 
00, Maintenance Service - Engine Coolant (Change)

P.00-

50

.]

•

Timing Belt Tensioner Pulley Removal and Installation 
(Refer to GROUP 11A, Timing Belt

P.11A-30

.)

AC001549

20 – 25 N·m
15 – 18 ft-lb

23 N·m
17 ft-lb

13 N·m
115 in-lb

1

2

3

4

N

N

AC

REMOVAL STEPS

1.

GENERATOR BRACE

>>B<<

2.

WATER PUMP ASSEMBLY

3.

WATER PUMP GASKET

>>A<<

4.

O-RING

REMOVAL STEPS (Continued)

WATER PUMP

TSB Revision

ENGINE COOLING

14-21

 <3.0L ENGINE>

INSTALLATION SERVICE POINTS

>>A<< O-RING INSTALLATION

CAUTION

•

Care must be taken not to permit engine oil or other 
grease to adhere to the O-ring.

•

When inserting the pipe, check to be sure that there is 
no sand, dirt, etc. on its inner surface.

Rinse the mounting location of O-ring and water pipe with 
water, and install the O-ring and water pipe.

Pre-removal and Post-installation Operation

•

Engine Coolant Draining and Supplying [Refer to GROUP 
00, Maintenance Service - Engine Coolant (Change)

P.00-

50

.]

•

Timing Belt Removal and Installation (Refer to GROUP 
11C, Timing Belt

P.11C-29

.)

AC000280

1

2

3

23 N·m
17 ft-lb

23 N·m
17 ft-lb

40 N·m
30 ft-lb

AC

N

N

4

REMOVAL STEPS

•

THERMOSTAT (REFER TO 

P.14-

18

.)

1.

BRACKET

>>B<<

2.

WATER PUMP ASSEMBLY

3.

WATER PUMP GASKET

>>A<<

4.

O-RING

REMOVAL STEPS (Continued)

ACX00402

O-RING

WATER PIPE

AD