Mitsubishi Evolution X. Manual - part 235

WATER HOSE AND WATER PIPE

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ENGINE COOLING

14-27

Required Special Tool:

• MB992042: Water Temp Sensor Wrench

REMOVAL SERVICE POINTS

.

<<A>> RADIATOR UPPER HOSE DISCONNEC-
TION

Make mating marks on the radiator hose and the hose clamp. 
Disconnect the radiator hose.

.

<<B>> FUEL HIGH-PRESSURE HOSE 
DISCONNECTION

1. Follow the steps below to unlock the fuel high-pressure hose 

connector.

•

Turbocharger assembly (Refer to 
GROUP 15, Exhaust Manifold 
and Turbocharger Assembly 

P.15-16

)

18. Turbocharger water return hose
19. Water pump inlet pipe
20. Cooling water line gasket

>>C<<

21. O-ring

Engine coolant temperature 
sensor removal steps 

14. Fuel return hose connection

<<B>>

>>B<<

15. Fuel high-pressure hose 

connection

22. Emission control vacuum hose 

and pipe assembly mounting 
bolts

6.

Engine coolant temperature 
sensor connector

<<C>>

>>A<<

23. Engine coolant temperature 

sensor

Water pump inlet pipe removal 
steps (Continued)

AC200641AD

Mating marks

AC506790 AD

Fuel high-pressure
hose

Retainer

Fuel delivery pipe

WATER HOSE AND WATER PIPE

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ENGINE COOLING

14-28

(1) Insert a flat-tipped screwdriver [6 mm (0.24 inch) wide 

and 1 mm (0.04inch) thick] into the retainer of the fuel 
high-pressure hose connector.

CAUTION

When pushing up the retainer of the fuel high-pressure 
hose connector, pay attention to avoid damage to the 
retainer. 

(2) Turn the flat-tipped screwdriver inserted into the retainer 

by 90 degrees to push up the retainer and unlock the fuel 
high-pressure hose connector.

2. Remove the fuel high-pressure hose.

.

<<C>> ENGINE COOLANT TEMPERATURE 
SENSOR REMOVAL

Use special tool MB992042 to remove the engine coolant tem-
perature sensor.

INSTALLATION SERVICE POINTS

.

>>A<< ENGINE COOLANT TEMPERATURE SEN-
SOR INSTALLATION

1. Apply sealant to the engine coolant temperature sensor 

thread.

Specified sealant: Three bond 1324N or equivalent

AC407430AG

Retainer

Flat-tipped 
screwdriver

Fuel high-pressure
hose

Fuel delivery pipe

AC407429AF

Retainer

Fuel high-pressure
hose

Flat-tipped 
screwdriver

Fuel delivery pipe

AC705545

MB992042

AC

AC103399AD

WATER HOSE AND WATER PIPE

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ENGINE COOLING

14-29

2. Use special tool MB992042 to tighten the engine coolant 

temperature sensor to the specified torque.

Tightening torque: 30 

± 9 N⋅ m (22 ± 7 ft-lb)

.

>>B<< FUEL HIGH-PRESSURE HOSE 
CONNECTION

CAUTION

• When pushing in the retainer of the fuel high-pressure 

hose connector, pay attention to avoid damage to the 
retainer.

• After the installation of the fuel high-pressure hose, 

slightly pull the fuel high-pressure hose to check that it 
is connected securely. At this time, also check that 
there is approximately 1 mm (0.04inch) play.

1. Securely insert the fuel rail stopper into the fuel 

high-pressure hose connector groove to install the fuel 
high-pressure hose to the fuel rail.

2. Push in the retainer of the fuel high-pressure hose 

connector to lock the fuel high-pressure hose and fuel rail.

.

>>C<< O-RING INSTALLATION

CAUTION

Avoid adhesion of engine oil or grease to the O-ring.
Fit the O-ring in the water pump inlet pipe groove, wet the 
O-ring circumference or the pipe mounting area inner wall, and 
then insert the O-ring.

.

AC705545

MB992042

AC

AC506794AC

Fuel high-pressure
hose

Retainer

Stopper

Fuel delivery pipe

AC103007AF

Thermostat case

Water pump
inlet pipe

O-ring

WATER HOSE AND WATER PIPE

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ENGINE COOLING

14-30

>>D<< RADIATOR UPPER 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

M1141003400650

WATER PIPE AND HOSE CHECK

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

AC200642

Mating
marks

Projection

Water inlet 
fitting 

AX