Mitsubishi Evolution X. Manual — part 232

SPECIAL TOOLS

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ENGINE COOLING

14-15

MB991223

a: MB991219
b: MB991220
b: MB991221
d: MB991222

Harness set

a: Test harness
b: LED harness
c: LED harness adaptor
d: Probe

General service tools

Checking the continuity and
measuring the voltage at the
harness connector

MB992006
Extra fine probe

General service tool

Continuity check and
voltage measurement at
harness wire or connector
for loose, corroded or
damaged terminals, or
terminals pushed back in
the connector.

MB991871
LLC changer

General service tool

Coolant refilling

MB992042
Water temp sensor
wrench

MB992042-01

Engine coolant temperature
sensor removal and
installation

Tool

Tool number and name Supersession

Application

MB991223

a

d

c

b

DO NOT USE

BF

MB992006

AB

MB991871

MB992042

ON-VEHICLE SERVICE

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ENGINE COOLING

14-16

ON-VEHICLE SERVICE

ENGINE COOLANT LEAK CHECK

M1141001000849

WARNING

When pressure testing the cooling system, slowly
release cooling system pressure to avoid getting
burned by hot coolant.

CAUTION

• Be sure to completely clean away any moisture from

the places checked.

• When the tester is taken out, be careful not to spill any

coolant.

• Be careful when installing and removing the tester and

when testing not to deform the filler neck of the radia-
tor.

1. Check that the coolant level is up to the filler neck. Install a

radiator tester and apply 160 kPa (23 psi) pressure, and
then check for leakage from the radiator hose or
connections.

2. If there is leakage, repair or replace the appropriate part.

RADIATOR CAP OPENING PRESSURE CHECK

M1141001301003

NOTE: Be sure that the cap is clean before testing. Rust or
other foreign material on the cap seal will cause an improper
reading.

1. Use a cap adapter to attach the cap to the tester.
2. Increase the pressure until the indicator of the gauge stops

moving.

Minimum limit: 83 kPa (12 psi)
Standard value: 93

− 123 kPa (14 − 18 psi)

3. Replace the radiator cap if the reading does not remain at or

above the limit.

ACX01844AE

Cap adapter

Adapter

ACX01845

Cap adapter

AD

ON-VEHICLE SERVICE

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ENGINE COOLING

14-17

ENGINE COOLANT CHANGE

M1141001201459

Required Special Tool:

• MB991871: LLC changer

1. Remove the engine room under cover front A (RH). (Refer to

GROUP 51, Under Cover

P.51-16

)

WARNING

When removing the radiator cap, use care to avoid
contact with hot coolant or steam. Place a shop towel
over the cap and turn the cap counterclockwise a lit-
tle to let the pressure escape through the vinyl tube.
After relieving the steam pressure, remove the cap by
slowly turning it counterclockwise.

2. Drain the water from the radiator, heater core and engine

after unplugging the radiator drain plug and removing the
radiator cap.

3. Remove the engine room under cover front B. (Refer to

GROUP 51, Under Cover

P.51-16

)

4. Remove the air cleaner intake hose. (Refer to GROUP 15,

Air Cleaner

P.15-10

)

5. Remove the turbocharger compressor bracket. (Refer to

GROUP 15, Exhaust Manifold and Turbocharger Assembly

P.15-16

)

6. Disconnect the turbocharger water return hose and drain the

coolant in the water jacket.

7. Remove the radiator condenser tank and drain the coolant.
8. Drain the coolant then clean the path of the coolant by

injecting water into the radiator from the radiator cap area.

9. Connect the turbocharger water return hose.
10.Securely tighten the drain plug of the radiator.
11.Reinstall the radiator condenser tank.

CAUTION

Do not use alcohol or methanol anti-freeze or any engine
coolants mixed with alcohol or methanol anti-freeze. The
use of an improper anti-freeze can cause corrosion of the
aluminum components.
12.By referring to the section on coolant, select an appropriate

concentration for safe operating temperature within the
range of 30 to 60%. Use special tool MB991871 to refill the
engine coolant up to the top of the radiator port. A
convenient mixture is a 50% water and 50% antifreeze
solution [freezing point:

−31° C (−23.8 ° F)].

Recommended antifreeze: Long Life Antifreeze

Coolant or an equivalent

Quantity: 7.5 dm

3

(7.9 quarts)

NOTE: For how to use special tool (MB991871), refer to its
manufacturer’s instructions.

13.Tighten the radiator cap securely.
14.Remove the radiator condenser tank cap, and add the

engine coolant up to the "FULL" line.

AC706501AC

Turbo charger
air inlet fitting

Turbo charger
water return hose

AC705466AC

MB991871

Air hose

ON-VEHICLE SERVICE

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ENGINE COOLING

14-18

15.Turn the A/C switch to OFF position to start the engine and

warm up until the cooling fan operates.
NOTE: This step opens the thermostat fully.

16.Rev the engine several times and then stop it. Check that

there are no coolant leaks.

17.Remove the radiator cap with the engine cool, and then refill

the engine coolant up to the top of the radiator port.

18.Tighten the radiator cap securely.

CAUTION

Do not overfill the radiator condenser tank.
19.Remove the radiator condenser tank cap, and add the

engine coolant up to the "FULL" line.

20.Install the turbocharger compressor bracket. (Refer to

GROUP 15, Exhaust Manifold and Turbocharger Assembly

P.15-16

)

21.Install the air cleaner intake hose. (Refer to GROUP 15, Air

Cleaner

P.15-10

)

22.Remove the engine room under cover front B and engine

room under cover front A (RH). (Refer to GROUP 51, Under
Cover

P.51-16

)

WATER PUMP COOLANT LEAK CHECK

M1141008600080

If a residue of the coolant draining is found on the drain hole,
the vapor hole and the installation surface, check the water
pump leakage by following method.
1. Wipe off the residue of the coolant draining on the water

pump.

WARNING

Make sure that the coolant is cold when removing the
radiator cap.

2. Remove the radiator cap.

CAUTION

Do not pressures 100 kPa (15 psi) or more.
3. Install the radiator tester and pressures at 100 kPa (15 psi).
4. Hold the pressurized state for 20 minutes, and check that

the water leakage from the drain hole, the vapor hole or the
installation surface of the water pump.

5. Remove the radiator tester, and install the radiator cap.
6. Warm up the engine, let it idle for 20 minutes and stop it.
7. After stopping the engine, and check that the water leakage

from the drain hole, the vapor hole or the installation surface
of the water pump.

8. If the water leakage is found in step 4 or 7, replace the water

pump. (Refer to

P.14-25

.)

ENGINE COOLANT CONCENTRATION TEST

M1141001101009

Refer to GROUP 00

− Recommended Lubricants and Lubricant

Capacities Table

P.00-56

.

ACX01844AE

Cap adapter

Adapter