Page 201 of 891
19
19 - 14
COOLING - EXHAUST - TANKAssembl exhaust
vnx.su
Page 202 of 891
19
19 - 15
COOLING - EXHAUST - TANKFuel tank
IMPORTANT:
During the int erventi on on the fuel tank
and on the fuel supply circuit, at t he working
place, do not smoke and do not bring near
an y incandescent parts.
Fuel tank draining i s not implying tank
dismountin g. The access is allowed through the
vehicle interior (trunk).
Dismo unt :
-tr unk carpet;
-v isitin g whole cover (by dismounting the
three attachment screws);
- disconnect the rapid coupling A;
- adjust to exit A, an enough long hose to
be introduced in a vessel outside the vehicle.
From the fuse box located inside the engine
compartment, remove the H relay of the petrol
pump and bridge across plugs 3 and 5 of the
relay connector, ensuring the petrol pump
working (12V).
Stop the pum p working when petrol
discontin uous draining s noticed.
Detach the plugs bridge.
Mount the petrol pump relay.
vnx.su
Page 203 of 891
19
19 - 16
COOLING - EXHAUST - TANK
FILLING CAP
Fuel tank
The fuel tank is having a filling cap, sealed-type, with key. The filling cap for unleaded fuel has
a filler whole incompatible with a c lassical filling gun (lead has a negative effect upon the de-
pollution system : oxygen sensor and catalyst).
In case of vehicle overturning, the anti-overturning valve is getting blocked, avoiding in this
wa y, the petrol leakage towards the carbon can.
vnx.su
Page 204 of 891

19
19 - 17
COOLING - EXHAUST - TANKFuel tank
DISMOUNTIN G
Drain the fuel tank ( 4)
Disconnect the battery.
Remove the trunk carpet.
Di smount the tank visiting cover from the
three attachment screws.
Di sconnect the e lectric connector f the fuel
pump assembly a nd detach from clips the
connection from the fuel supply pipe. Take out the spare wheel and release it
together with its support.
Remove the filling cap ( 2) and dismount the
two attachment screws of the upper filling cap.
Lift the vehicle on a two columns elevator.
Dismount the four-attachment screws (6) of
the fuel tank on the carriage body, then maintained
in tilted position, disconnect the rapid coupling
on the anti-overturning valve ( 7).
D etach from clips collar ( 3) of the aerating
pipe on the upper filling cap.
Release the fuel tank together with the aerating
connection. Dismount the thermal screen ( 5) off the three
maintaining clips. Dismount the attachment clip ( 1) of the filling
cap muff on the lower filling cap.
Dism ount t he fue l pum p a sse mbly by
dismounting the attachment nut by means of the
MOT 1397 device.
REMOUNTIN G
Perform the dismounting operatio ns in the
reverse order. The t ightening moment of t he fuel tank
attachment screws on the carriage body is of
2.1 daNm and the tightening moment for fuel
pump assembly attachment nut, is of minimal
7daNm .
REMARK :
Collar (1) is for single use only.
When remounting, use a new click collar
(1 ), for the attachmen t of the lower filling cap
connection on the fuel tank.
REMARK:
At remonting, for each 2 back screws
at t ac he ment fue l tank, ap l y 0.002 kg
FIXAMED M 28, for to realise security
moment.
vnx.su
Page 205 of 891

19
19 - 18
COOLING - EXHAUST - TANK
VEHICLES WI THOUT VISITING CAP
Fuel tank
TIGHTENING MOMENTS (daNm)
Fuel ta nk attachment screws 2.1
IMPORTANT :
Dur ing thi s operation it is
compulsory:
-not smoking and not approaching
with i ncandescent obj ects in t he working
area, -keep awa y from fue l spray i ng
when disc onn ectin g the fu el
connections, protect the sensitive area of
fuel leak.
Dismount :
- protection shield ( 3);
- filling cap attachment clip (5) on tank;
- fuel pump assembly (6).
REMOU NT I NG
Perform the di smounting opera tions in the
reverse order.
Tighten to the required moment the fuel tank
attachment screws (2.1 daNm); the thread of
the two rear attachmen t screws is to be lubricated
before mounting with Fixamed M28 (necessary
quantity – 2 grams).
Re p lace the single use clip ( 5) with a tightening
clip “CAILLAU” .
12
6
5 4
3
DISMOUNTIN G
Place the vehi c le on a t wo-c ol um n
elevator. Disconnect the battery (-) terminal.
Dismount the fuel tank cap.
Drain the fuel tank through the filling cap,
by means of a draining pneumatic or electric
pump. Dismount the a ttachments screws ( 1) of
the upper filling cap.
Lift the vehicle by means of the elevator.
Di smount the four attachment screws of
the fuel tank. Dismount the attachment clip ( 2) of the
aeration hose ( 4) on filling cap.
Carefully lower the tank and disconnect it:
- wiring connector;
- fuel supply pipe;
- petrol vapors re-aspiration pipe (for
petrol engines); - fuel return pipe (for Diesel engines);
Extract the aera tion hose on top of tank
crossbar and dismount the tank.
vnx.su
Page 206 of 891
19
19 - 19
COOLING - EXHAUST - TANK
TANK DIAGRAM
1. Aerating pip
2. Safety valve (over pressure, depression)
3. Anti-overturning valve
4. Pipe connection to carbon can
5. Restrictor
E. Air evacuation orifice during filling
F. Air volume enabling fuel dilatatio n.
R. Fuel cap.
V. Maximal admissible fuel volume.
5
4
E
Fuel tank
vnx.su
Page 207 of 891
19
19 - 20
COOLING - EXHAUST - TANK
FUEL CIRCUIT DIAGRAM
1. Supply pipe
2. Carbon can
3. Piping attachmen t clip
4. Vapor re-aspiration pipe.
5. Fuel tank.
Fuel tank
vnx.su
Page 208 of 891
19
19 - 21
COOLING - EXHAUST - TANK
Safety valve ( over pressure, depression)
In case recyclin g circuit of the petrol vapors is clogged, this valve is avoiding the over-pressure
(inflated tank) or the depression (by fuel consumption- the tank is flattening).
Restrictor
Does not allow leaded fuel filling in the tank.
Anti-overturning valve
In case of vehicle overturning, this is avoiding the fuel leakage through the pipe leading to the
carbon can.
Fuel tank
Va l v es function
vnx.su