engine RENAULT TWINGO RS 2009 2.G Engine And Peripherals Workshop Manual

13A-5
FUEL SUPPLY
Fuel filter: Removal - Refitting
K9K
13A
II - OPERATION FOR REMOVAL OF PART
CONCERNED
aRemove:
-the fuel filter mounting nut (3) ,
-the fuel filter from its mounting.
aDetach the water detection sensor offset connector
on the fuel filter mounting (if fitted).
REFITTING
I - REFITTING OPERATION FOR PART
CONCERNED
aaAttach the water detection sensor offset connector
to the fuel filter mounting (if fitted).
aRefit the fuel filter to its mounting.
aFit the fuel filter mounting nut.
II - FINAL OPERATION.
aPosition the fuel pipes.
aConnect to the fuel filter:
-the manual priming pump outlet pipe,
-the high pressure pump inlet pipe.
aOpen the bleed screw on top of the fuel filter.
aPrime the fuel circuit using a manual priming pump
until the disconnected pipes are filled with fuel.
aClose the bleed screw on top of the fuel filter.
aCheck that there are no fuel leaks.
aStart the engine.
aCheck that there are no fuel leaks.
aSwitch off the engine.
aRefit the engine cover.
BLEEDING
aRemove the fuel filter mounting nut.
aDetach the manual priming pump.
aRemove the fuel filter without pulling on the water
detection sensor wiring harness in the diesel fuel.
aPosition a container under the fuel filter which has
been removed from its mounting.
aTurn the bleed cap or the water detection sensor in
the diesel fuel (depending on equipment) by no
more than one turn.
aAllow it to flow until diesel fuel appears.
aClose the bleed cap or the water detection sensor
(depending on equipment).
121441
Note:
If the fuel filter is to be reused, fit blanking plugs
to the fuel supply pipes and fuel filter openings,
using the appropriate blanking plug kit, depend-
ing on the engine (see 13B, Diesel injection,
Diesel injection: Precautions for the repair,
page 13B-1) .
WARNING
Do not remove the blanking plugs from each
component until the last moment.
Also, do not remove the components from their
packaging until they are to be fitted to the vehi-
cle.
Note:
Chec k that the fuel filter is correctly positioned
and secure on its mounting by shaking it: the fil-
ter must not move.
WARNING
Prepare for the flow of fluid, and protect the sur-
rounding components.

13A-7
FUEL SUPPLY
Electric diesel fuel heater: Removal - Refitting
C44, and K9K
13A
REMOVAL
I - OPERATION FOR REMOVAL OF PART
CONCERNED
aPosition the vehicle on a two-post lift ( (see Vehicle:
Towing and lifting) ).
II - OPERATION FOR REMOVAL OF PART
CONCERNED
aDisconnect the electric diesel fuel heater electrical
connector (1) .
aRemove the nut (2) from the electric diesel fuel heat-
er mounting on the body.
aDisconnect the inlet and outlet fuel supply pipes (3)
from the electric diesel fuel heater.
aRemove the electric diesel fuel heater and its mount-
ing from the vehicle.
aSeparate the electric diesel fuel heater from its
mounting, letting it flow.
REFITTING
I - REFITTING OPERATION FOR PART
CONCERNED
aFit then lock the electric diesel fuel heater to its
mounting.
aFit the electric diesel fuel heater and its mounting to
the vehicle.
aConnect the electric diesel fuel heater inlet and out-
let fuel supply pipes.
aRefit the electric diesel fuel heater mounting nut on
the body.
aTighten the diesel heater mounting nut on the body.
aConnect the electric diesel fuel heater electrical con-
nector.
aPrime the diesel circuit using the manual priming
pump (4) .
aStart the engine then let it run for a few minutes to
check that it starts properly and to check that there
are no leaks.
II - FINAL OPERATION.
aDeal with possible fuel leaks.
120049
Note:
Make preparations for fuel outfl ow.
120045

13A-8
FUEL SUPPLY
Fuel circuit: Operating diagram
D4F or D7F or K4M
13A
Operating diagram of the fuel supply circuit ( « pump - sender - fuel filter » assembly)
The fuel supply circuit does not have a return.
The fuel pressure does not vary with engine load.
The circuit comprises:
-a rail (1) without a return pipe union and without a
supply pressure regulator,
-a single pipe (2) coming from the tank,
-a « pump - sender - fuel filter » supply assembly fitted
with a pressure regulator (3) , fuel pump (4) and fuel
filter (5) (all located in the tank),
-a fuel vapour recirculation tank (6) .
109471

13A-11
FUEL SUPPLY
Fuel pressure: Check
D4F or D7F
13A
aConnect:
-the pipe fitted with a pressure checking gauge with
the “T” union of the tool (Mot. 1311-08),
-the “T” union to the rail,
-the petrol inlet duct to the “T” union.
aStart the engine.
aDetermine the pressure:
-the pressure must be a constant 3.5 bar,
-It may take a few seconds to obtain a correct injec-
tor rail pressure reading.
aSwitch off the engine.
III - FINAL OPERATION
aRemove the “T” union (Mot. 1311-08).
aRemove:
-the oil filler neck,-the “T” union (Mot. 1311-08).
aConnect the fuel supply union.
aRefit the oil filler neck. D7F
121822
D7F
D4F
D4F

13A-13
FUEL SUPPLY
Fuel pressure: Check
K4M
13A
-the injector rail fuel supply union to the "T" union
(Mot. 1311-08).
aStart the engine.
aRecord the pressure; this should be constant at 3.5
bar.
aSwitch off the engine.
III - FINAL OPERATION
aDisconnect the "T" union (Mot. 1311-08) from the in-
jector rail.
aConnect the fuel supply pipe union on the injector
rail.Note:
It may take a few seconds to obtain a correct
injector rail pressure reading.

13A-15
FUEL SUPPLY
Fuel flow: Check
D4F or D7F
13A
aFit a “T” union to the fuel supply union (Mot. 1311-
08).
aFit a pipe which is long enough to drain the pump
into a container to the “T” outlet union.aFit a “T” union to the fuel supply union (Mot. 1311-
08).
aFit a pipe which is long enough to drain the pump
into a container to the “T” outlet union.
II - CHECK
aImmerse the pipe into a graduated measuring cyl-
inder (2000 ml).
aRemove the cover from the engine compartment
connection unit. D4F, and 780 or 782
121729
D7F
121779

13A-16
FUEL SUPPLY
Fuel flow: Check
D4F or D7F
13A
aRemove the relay (1) .
aShunt the relay to supply the electric fuel pump.
III - FINAL OPERATION
aRefit:
-the fuel pump relay,
-the cover of the engine compartment connection
unit.
aRemove the “T” union (Mot. 1311-08).
aConnect the fuel supply union.
aRefit the oil filler neck.
119373
Note:
The flow reading should be 80 to 120 l/h.
D4F

13A-17
FUEL SUPPLY
Fuel flow: Check
K4M
13A
I - PREPARATION OPERATION FOR CHECK
aEnsure you have a checking tool (Mot. 1311-01) and
a “T” union (Mot. 1311-08).
aAssemble the long hose of the test tool (Mot. 1311-
01) and the "T" union (Mot. 1311-08).
aDisconnect the fuel supply union on the injector rail.aConnect:
-the "T" union (Mot. 1311-08) on the injector rail,
-the fuel supply union to the "T" union (Mot. 1311-
08).
II - FUEL FLOW CHECK
aImmerse the hose in a 2000 ml graduated measur-
ing cylinder.
aRemove the cover from the engine compartment
connection unit. Special tooling required
Mot. 1311-01Pressure gauges and petrol
pressure measur ing unions.
Mot. 1311-08Union for taking fuel pres-
sure measurements .
Equipment required
graduated measuring cylinder
IMPORTANT
During this oper ation, be sure to:
-refrain from smoking or bringing red hot objects
close to the working area,
-be careful of fuel splashes when disconnecting the
union.
IMPORTANT
Wear leaktight gloves (Nitrile type) for this opera-
tion.
IMPORTANT
Wear goggles with side protectors for this opera-
tion.
WARNING
To avoid any corrosion or damage, protect the
areas on which fuel is likely to run.
132334

13A-18
FUEL SUPPLY
Fuel flow: Check
K4M
13A
aRemove the relay (1) .
aShunt the relay in order to supply the electric fuel
pump.
III - FINAL OPERATION
aRefit:
-the relay,
-the engine compartment connection unit cover.
aDisconnect:
-the fuel supply union on the "T" union (Mot. 1311-
08),
-the "T" union (Mot. 1311-08) from the injector rail.
aConnect the fuel supply union on the injector rail.
aSeparate the test tool (Mot. 1311-01) from the "T"
union (Mot. 1311-08).
119373
Note:
The flow reading should be 80 to 120 l/h.

13B-1
DIESEL INJECTION
Diesel injection: Precautions for the repair
K9K
13B
I - RISKS RELATING TO CONTAMINATION
The high-pressure direct injection system is highly sen-
sitive to contamination. The risks caused by contami-
nation are:
-damage to or destruction of the high pressure injec-
tion system,
-a component seizing,
-a component not being properly sealed.
All After-Sales operations must be performed under
very clean conditions. Having carried out an operation
in good conditions means that no impurities (particles a
few microns in size) have penetrated the system during
dismantling.
The cleanliness principle must be applied from the filter
to the injectors.
What are the sources of contamination?
-metal or plastic swarf,
-paint,
-fibres:
•cardboard,
•brushes,
•paper,
•clothing,
•cloth,
-foreign bodies such as hair,
-ambient air,
-etc.
1 - Cleaning cloths
Use lint-free cleaning cloths (see Vehicle: Parts and
consumables for the repair) (04B, Consumables -
Products).
It is prohibited to use cloths or ordinary paper towels:
these produce lint and lose fibres, which then contami-
nate the fuel circuit.
Each cloth must only be used once.2 - Blanking plugs
The blanking plugs are used to cap the fuel circuit once
it is opened and to therefore prevent contaminants
from entering.
A set of blanking plugs should be used once only and
used plugs must be discarded after use: once used,
the plugs are soiled and cleaning them is not sufficient
to make them reusable.
Unused plugs must also be discarded and must not be
used when carrying out work on an injection system.
Part number for set of blanking plugs: (see Vehicle:
Parts and consumables for the repair) (04B, Con-
sumables - Products).
3 - Protective bags
Use hermetically-resealable plastic bags, using adhe-
sive tape, for example, to store components which will
be refitted and reused. Stored parts will therefore be
less subject to the risk of contamination.
These are single-use bags: after use they must be dis-
carded.
4 - Cleaning products
Two cleaning products can be used:
-an injector cleaner (see Vehicle: Parts and consum-
ables for the repair) (04B, Consumables - Products),
-an aerosol spray brake cleaner (see Vehicle: Parts
and consumables for the repair) (04B, Consum-
ables - Products).
To use the injector cleaner, be sure to have a clean
brush in good condition (the brush must not lose any
bristles) as well as a clean container which has no im-
purities in it. WARNING
Do not clean the engine with a high pressure
cleaner to prevent damaging the connections.
Note:
There is no specific set of blanking plugs for S9U
and S9W engines. In order to comply with the
cleanliness recommendations, use plugs that are
compatible with the blanking plug sets for F9Q,
G9U, G9T or ZD3 engines.
Note:
Use a new injector cleaner each time work is car-
ried out (a used cleaning agent will contain impuri-
ties).