Page 550 of 652

19A-40
COOLING
Water chamber: Removal - Refitting
D4F, and 772 – D7F
19A
PARTS AND CONSUMABLES FOR THE
REPAIR WORK
aPart always to be replaced:
-water chamber seal.
REMOVAL
I - REMOVAL PREPARATION OPERATION
aPosition the vehicle on a two-post lift ( (see Vehicle:
Towing and lifting) ).
aRemove the air filter box (see 12A, Fuel mixture,
Air filter unit: Removal - Refitting, page 12A-13) .
aDrain the cooling system (see 19A, Cooling, Cool-
ing system: Draining - Refilling, page 19A-9) .
II - OPERATION FOR REMOVAL OF PART
CONCERNED
aMove the water chamber hose clips to one side us-
ing the (Mot. 1448) or (Mot. 1202-01) or (Mot. 1202-
02).
aDisconnect the water chamber hoses.aRemove:
-the water chamber bolts (1) ,
-the water chamber.
REFITTING
I - REFITTING PREPARATIONS OPERATION
aClean the gasket faces.
II - REFITTING OPERATION FOR PART
CONCERNED
aRefit:
-the water chamber with a new seal,
-the water chamber bolts.
aTorque tighten the water chamber bolts (10 Nm).
aConnect the water chamber hoses.
aFit the water chamber hose clips using the (Mot.
1448) or (Mot. 1202-01) or (Mot. 1202-02). Special tooling required
Mot. 1448Remote operation pliers for
hose clips .
Mot. 1202-01Clip pliers for hose clips
(large size).
Mot. 1202-02Clip pliers for hose clips
(small size)
Tightening torquesm
water chamber bolts10 Nm
D4F
113372
WARNING
The joint faces must be clean, dr y and free from
grease (avoid finger marks).
Page 552 of 652

19A-42
COOLING
Water chamber: Removal - Refitting
K9K
19A
REMOVAL
I - REMOVAL PREPARATION OPERATION
aPosition the vehicle on a two-post lift (see Vehicle:
Towing and lifting) (02A, Lifting equipment).
aRemove the front engine cover. Special tooling required
Mot. 1448Remote operation pliers for
hose clips .
Tightening torquesm
water chamber bolts10 N.m
intercooler air outlet
pipe clip at the damper
valve end5.5 N.m
IMPORTANT
When working in the engine compartment, take
care as the radiator fan(s) may start up unexpect-
edly (risk of being cut).
To avoid any risk of serious burns when the engine
is hot:
-do not open the expansion bottle cap,
-do not drain the cooling system,
-do not open the bleed screw(s).
WARNING
Before the operation, protect the electrical accesso-
ries to prevent any risk of shor t circuiting and pro-
tect the belts to avoid damaging them.
WARNING
When carr ying out a repair that requires a complete
change, it is essential to flush the circuit with clean
water, blast compressed air through the circuit to
drive out the water, fill and bleed the circuit and
then measure the effective protection.
The cr iteria to be met are:
-protection down to -25˚C ±± ± ±
2 for cold and temper-
ate countries,
-protection down to -40˚C ±± ± ±
2 for "extreme cold"
countries.
WARNING
The coolant helps to keep the engine running prop-
erly (heat exchange).
The system does not operate using pure water.
WARNING
Take care not to damage the bearing faces to pre-
vent any risk of coolant leaks.
Page 554 of 652

19A-44
COOLING
Water chamber: Removal - Refitting
K9K
19A
aDrain the cooling system (see 19A, Cooling, Cool-
ing system: Draining - Refilling, page 19A-9) .
aUnclip the cooling hose of the coolant-oil heat ex-
changer at (11) .
aMove aside the cooling hose of the coolant-oil heat
exchanger.
aSeparate the clips of the water chamber cooling hos-
es (12) using the (Mot. 1448).
aDisconnect:
-the water chamber cooling hoses (12) ,
-the coolant temperature sensor connector.II - OPERATION FOR REMOVAL OF PART
CONCERNED
aRemove:
-the water chamber bolts (13) ,
-the water chamber,
-the water chamber seal.
aTurn the thermostat one quarter of a turn.
aRemove the thermostat from the water chamber.
REFITTING
I - REFITTING PREPARATION OPERATION
aUse SURFACE CLEANER (see Vehicle: Parts
and consumables for the repair) (04B, Consum-
ables - Products) to clean and degrease.
aparts always to be replaced: Cylinder head cool-
ant outlet unit seal
141218
121416121416
WARNING
Do not scrape the joint faces of the aluminium,
any damage caused to the joint face will result in
a risk of leaks.
WARNING
To ensure proper sealing, the gasket surfaces
must be clean, dry and not greasy (avoid any fin-
ger mar ks).
Page 555 of 652

19A-45
COOLING
Water chamber: Removal - Refitting
K9K
19A
II - REFITTING OPERATION FOR PART
CONCERNED
aRefit the thermostat to the water chamber.
aRefit:
-a new water chamber seal,
-the water chamber.
aTorque tighten the water chamber bolts (10 N.m).
III - FINAL OPERATION
aConnect the cooling hoses on the water chamber.
aPosition the cooling hose clips on the water chamber
using the tool (Mot. 1448).
aClip on the cooling hose of the coolant-oil heat ex-
changer.
aConnect the intercooler air outlet pipe on the side of
the damper valve.
aTorque tighten the intercooler air outlet pipe clip
at the damper valve end (5.5 N.m).
aConnect the brake servo vacuum pipe.
aClip:
-the turbocharging pressure regulator vacuum pipe,
-the vacuum pipe from the brake servo.
aConnect the turbocharging pressure regulator vacu-
um pipe.
aRefit the nuts of the air hoses on the lifting eye.
aConnect the intercooler air inlet pipe at the turbo-
charger end.
aClip on the intercooler air inlet pipe clip at the turbo-
charger end.
aFill the cooling system (see 19A, Cooling, Cooling
system: Draining - Refilling, page 19A-9) .
aRefit the engine cover. K9K, and 718
Page 556 of 652

19A-46
COOLING
Water chamber: Removal - Refitting
D4F, and 780 or 782
19A
REMOVAL - REFITTING
I - REMOVAL PREPARATION OPERATION
aPosition the vehicle on a two-post lift (see Vehicle:
Towing and lifting) (MR 411, 02A, Lifting equip-
ment).
aDrain the cooling system (see 19A, Cooling, Cool-
ing system: Draining - Refilling, page 19A-9) .
II - OPERATION FOR REMOVAL OF PART
CONCERNED
aDetach the turbocharger cooling pipe from the cylin-
der head.
aRemove the water chamber hose clips using the
(Mot. 1448).
aDisconnect the water chamber hoses.
aRemove the pipe from the heater matrix under the
water chamber.aRemove:
-the water chamber bolts (1) ,
-the water chamber (2) ,
-the water chamber seal.
REFITTING
I - REFITTING PREPARATION OPERATION
aAlways replace the water chamber seal.
II - REFITTING OPERATION FOR PART
CONCERNED
aPosition the water chamber with a new seal.
aScrew on the water chamber bolts without tightening
them.
aTorque tighten the water chamber bolts (10 N.m).
aConnect the water chamber hoses.
aFit the heater matrix pipe under the water chamber.
aRefit the water chamber hose clips using the (Mot.
1448).
aClip the turbocharger cooling pipe onto the cylinder
head. Special tooling required
Mot. 1448Remote operation pliers for
hose clips .
Tightening torquesm
water chamber bolts10 N.m
Note:
Use a cloth to protect the TDC sensor to prevent
any coolant entering the opening on the gearbox.
113372
WARNING
The joint faces must be clean, dr y and free from
grease (avoid finger marks).
Page 558 of 652

19A-48
COOLING
Water chamber: Removal - Refitting
K4M
19A
REMOVAL
I - REMOVAL PREPARATION OPERATION
aPosition the vehicle on a two-post lift (see Vehicle:
Towing and lifting) (02A, Lifting equipment).
aRemove:
-the air filter unit (see 12A, Fuel mixture, Air filter
unit: Removal - Refitting, page 12A-13) ,
-the engine undertray.
aDrain the cooling system (see 19A, Cooling, Cool-
ing system: Draining - Refilling, page 19A-9) . Special tooling required
Mot. 1448Remote operation pliers for
hose clips .
Mot. 1202-01Clip pliers for hose clips
(large size).
Mot. 1202-02Clip pliers for hose clips
(small size)
Tightening torquesm
water chamber bolts
(initial torque)4 N.m
water chamber bolts12 N.m
heater matrix hose
bracket bolt10 N.m
IMPORTANT
When working in the engine compartment, take
care as the radiator fan(s) may start up unexpect-
edly (risk of being cut).
To avoid any risk of serious burns when the engine
is hot:
-do not open the expansion bottle cap,
-do not drain the cooling system,
-do not open the bleed screw(s).
WARNING
When carr ying out a repair that requires a complete
change, it is essential to flush the circuit with clean
water, blast compressed air through the circuit to
drive out the water, fill and bleed the circuit and
then measure the effective protection.
The cr iteria to be met are:
-protection down to -25˚C ±± ± ±
2 for cold and temper-
ate countries,
-protection down to -40˚C ±± ± ±
2 for "extreme cold"
countries.
WARNING
Before the operation, protect the electrical accesso-
ries to prevent any risk of shor t circuiting and pro-
tect the belts to avoid damaging them.
Page 560 of 652

19A-50
COOLING
Water chamber: Removal - Refitting
K4M
19A
II - REFITTING OPERATION
aRefit the coolant outlet unit with a new seal.
aPretighten in order and to torque the water cham-
ber bolts (initial torque) (4 N.m).
aTorque tighten in order the water chamber bolts
(12 N.m).
III - FINAL OPERATION
aClip the wiring onto the water chamber.
aFit the engine wiring channel.
aRefit:
-the coolant temperature sensor (see 19A, Cool-
ing, Coolant temperature sensor: Removal - Re-
fitting, page 19A-66) ,
-the heater matrix hose bracket.
aTorque tighten the heater matrix hose bracket bolt
(10 N.m).
aConnect to the coolant outlet unit:
-the heater matrix hose,
-the cooling radiator top hose.
aUsing the (Mot. 1448) or (Mot. 1202-01) or (Mot.
1202-02) fit:
-the heater matrix hose clip,
-the cooling radiator top hose clip.
aRefit the air filter unit (see 12A, Fuel mixture, Air fil-
ter unit: Removal - Refitting, page 12A-13) .aFill and bleed the cooling system (see 19A, Cool-
ing, Cooling system: Draining - Refilling, page
19A-9) .
aRefit the engine undertray.
128456
Page 564 of 652

19A-54
COOLING
Engine cooling fan assembly: Removal - Refitting
D4F, and 780 or 782
19A
REMOVAL
I - REMOVAL PREPARATION OPERATION
aPosition the vehicle on a two-post lift (see Vehicle:
Towing and lifting) (MR 411, 02A, Lifting equip-
ment).
aDisconnect the battery (see ) (MR 411, 80A, Bat-
tery).
aRemove:
-the front wheels (see Wheel: Removal - Refitting)
(MR 411, 35A, Wheels and tyres),
-the front wheel arch liners (see Front wheel arch
liner: Removal - Refitting) (MR 412, 55A, Exterior
protection),
-the front bumper (see Front bumper: Removal -
Refitting) (MR 412, 55A, Exterior protection).
aDisconnect the air filter unit air inlet pipe (1) from the
air filter unit cover.
aRemove:
-the air filter unit air inlet pipe bolt (2) from the cross
member,
-the air filter unit air inlet pipe.
aDrain the cooling system (see 19A, Cooling, Cool-
ing system: Draining - Refilling, page 19A-9) .aRemove using the (Mot. 1448) :
-the radiator top hose clip,
-the radiator degassing hose clip.
aDisconnect:
-the radiator top hose,
-the radiator degassing hose.
aUnclip:
-the lower hose from the engine cooling fan assem-
bly,
-the wiring harness from the engine cooling fan as-
sembly.
aDisconnect the engine cooling fan assembly con-
nectors.
II - REMOVAL OPERATION FOR PART
CONCERNED
a
aRemove:
-the radiator mounting cross member (see Radiator
mounting cross member: Removal - Refitting)
(MR 412, 41A, Front lower structure),
-the « radiator / engine cooling fan assembly » unit. Special tooling required
Mot. 1448Remote operation pliers for
hose clips .
122833
Note:
Hold the radiator during the removal of the radia-
tor lo wer cross member.