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

12A-56
FUEL MIXTURE
Exhaust manifold: Removal - Refitting
K4M
12A
aRemove:
-the bulkhead heat shield bolts (2) ,
-the bulkhead heat shields.
aDisconnect the oxygen sensor connectors (3) .
aUnclip the oxygen sensor wiring at (4) .
132436132373
132378

12A-57
FUEL MIXTURE
Exhaust manifold: Removal - Refitting
K4M
12A
II - REMOVAL OPERATION
aRemove the exhaust manifold nuts.
aRemove:
-the bolts (5) from the « exhaust manifold - catalytic
converter » assembly,
-the « exhaust manifold - catalytic converter » as-
sembly,
-the seal from the « exhaust manifold - catalytic
converter » assembly.
132379
132392
132360

12A-58
FUEL MIXTURE
Exhaust manifold: Removal - Refitting
K4M
12A
If replacing the « exhaust manifold - catalytic
converter » assembly
aRemove:
-the upstream and downstream oxygen sensors (6)
,
-the heat shield (7) .
REFITTING
I - REMOVAL PREPARATION OPERATION
aUse SURFACE CLEANER (see Vehicle: Parts
and consumables for the repair) (04B, Consuma-
bles - Products) to clean and degrease:
-the exhaust manifold joint face if it is to be re-used,
-the cylinder head joint face.
aparts always to be replaced: exhaust manifold
seal.
aTorque tighten the exhaust manifold studs (9
N.m).If replacing the « exhaust manifold - catalytic
converter » assembly
aClean the threading of the upstream and down-
stream oxygen sensors using a wire brush.
aUse SURFACE CLEANER (see Vehicle: Parts
and consumables for the repair) (04B, Consuma-
bles - Products) to clean and degrease:
-the thread holes of the upstream and downstream
oxygen sensors on the exhaust manifold,
-the threading of the upstream and downstream ox-
ygen sensors.
aRefit the heat shield.
aTighten:
-to torque and in order the heat shield bolts (12
N.m),
-to torque the upstream and downstream oxygen
sensors ( 44 N.m).
aIf the strut mounting bolt on the cylinder block be-
comes loose, torque tighten the strut mounting
bolt on the cylinder block ( 75 N.m).
II - REFITTING OPERATION
aRefit:
-a new seal on the « exhaust manifold - catalytic
converter » assembly,
-the « exhaust manifold - catalytic converter » as-
sembly.
132441
Note:
If a stud loosens during removal, coat it with
HIGH RESISTANCE THREADLOCK (see Vehi-
cle: Parts and consumables for the repair)
(04B, Consumables - Products).
132441

12A-59
FUEL MIXTURE
Exhaust manifold: Removal - Refitting
K4M
12A
aPretighten the upstream strut bolt (initial torque)
(14 N.m) (8) .
aTorque tighten in order the exhaust manifold nuts
(26 N.m).aTorque tighten the upstream and downstream
(strut bolts44 N.m) (9) .
aTorque tighten the upstream strut bolts (44 N.m)
(10) .
III - FINAL OPERATION
aClip on the oxygen sensor wiring.
aConnect the oxygen sensor connectors.
aRefit:
-the bulkhead heat shields,
132360
132379132392
132360

12A-60
FUEL MIXTURE
Exhaust manifold: Removal - Refitting
K4M
12A
-the driveshaft relay bearing.
aTorque tighten the driveshaft relay bearing bolts
(21 N.m).
aRefit:
-the upstream expansion chamber (see 19B, Ex-
haust, Expansion chamber: Removal - Refit-
ting, page 19B-23) ,
-the lower engine tie-bar (see 19D, Engine mount-
ing, Lower engine tie-bar: Removal - Refitting,
page 19D-18) ,
-the front right-hand wheel driveshaft (see Front
right-hand driveshaft: Removal - Refitting)
(29A, Driveshafts).
aFill the gearbox (see Manual gearbox oils: Drain-
ing - Filling) (21A, Manual gearbox).
aRefit:
-the scoop under the scuttle panel grille (see Scoop
under the scuttle panel grille: Removal - Refit-
ting) (56A, Exterior equipment),
-the scuttle panel grille (see Scuttle panel grille:
Removal - Refitting) (56A, Exterior equipment),
-the windscreen wiper arms (see Windscreen wip-
er arm: Removal - Refitting) (85A, Wiping -
Washing),
-the front right-hand wheel (see Wheel: Removal -
Refitting) (35A, Wheels and tyres),
-the engine undertray.
aConnect the battery (see Battery: Removal - Refit-
ting) (80A, Battery).

12B-1
TURBOCHARGING
Turbocharging: Precautions for the repair
D4F or K9K
12B
I - TURBOCHARGER: GENERAL INSTRUCTIONS
For the turbocharging pressure regulator check (see
Fault finding - Tests) (Technical Note 3419A, 12B,
Turbocharging).
II - TURBOCHARGER CIRCUIT DIAGRAMIII - APPLICATION CONDITIONS OF
INSTRUCTIONS
The instructions below must be followed when repla-
cing a turbocharger due to mechanical damage:
-damage to the bearing system,
-broken shaft or turbine wheel,
-compressor wheel rubbing against the turbocharger
casing,
-broken or damaged compressor wheel,
-extensive clogging of the turbine wheel casing (hard
deposits).
FOR THE AIR CIRCUIT:
-Consequences:
•swarf or metal objects in the turbocharger inlet and
outlet pipes,
•oil in the air circuit (collected in the intercooler).
-Risks (after replacing the turbocharger):
•metal objects sucked in by the compressor wheel
(destruction of the turbocharger).
FOR THE LUBRICATION CIRCUIT:
-Consequences:
•swarf found in the engine oil circuit,
•circulation of swarf within the circuit.
-Risks (after replacing the turbocharger):
•premature wear on the bearing system (destruction
of turbocharger).
INSTRUCTIONS:
-Drain the engine oil (see 10A, Engine and cylinder
block assembly, Engine oil: Draining - Refilling,
page 10A-22)
-Replace the oil filter (see 10A, Engine and cylinder
block assembly, Oil filter: Removal - Refitting,
page 10A-29) .
-Replace the seals and fittings,
-Carry out the following only if the compressor wheel is
broken or rubbing against the turbocharger casing:
•Drain the intercooler, Equipment required
par ts washer
WARNING
The turbocharger pressure regulator rod must not
be adjusted.
112666
(1) Air filter unit
(2) Air flowmeter
(3) Compressor wheel
(4) Intercooler
(5) Inlet distributor
(6) Exhaust manifold
(7) Turbine wheel
(8) Bearing system (bearing +
wheel shaft)
(A) Air filter box air outlet pipe
(B) Turbocharger air outlet pipe
(C) Intercooler air outlet pipe
WARNING
Metal objects may enter the oil and air circuits as a
result of a broken turbocharger.
Failure to follow the INSTRUCTIONS listed will lead
to the turbocharger breaking again.

12B-2
TURBOCHARGING
Turbocharging: Precautions for the repair
D4F or K9K
12B
•Clean the turbocharger air pipes.
IV - AIR CIRCUIT*: INSTRUCTIONS FOLLOWING
MECHANICAL DAMAGE TO THE TURBOCHARGER
Remove the intercooler if fitted to the vehicle (see 12B,
Turbocharging, Intercooler: Removal - Refitting,
page 12B-18) .
Turn the intercooler over and allow the oil inside to
drain out.Check that there are no metal objects inside the air
flowmeter (2) .
Remove:
-the air pipe(between the air filter unit and the turbo-
charger) (A) ,
-the air pipe (B) (between the turbocharger and the in-
tercooler).
For air pipes comprising several components:
-mark (10) the fitting position of each component,
-separate all the components. Note:
When carrying out an oper ation on the air or lubri-
cation circuit, it is necessary to plug the open holes
to prevent any risk of foreign bodies entering the
system.
Note:
(*) These instructions for the air circuit are only to
be followed in the case of:
-broken compressor wheel,
-compressor wheel rubbing against the turbo-
charger casing.
110738
Note:
If the compressor wheel (9) is damaged, metal
objects are ejected inside the air pipes.
112772
112770

12B-3
TURBOCHARGING
Turbocharging: Precautions for the repair
D4F or K9K
12B
One by one, clean the pipes removed with the parts
washer :
-brush as much of the inside of the pipe as possible
(only use brushes with plastic bristles),
-wash plenty of cleaning product from the cleaning sta-
tion through the pipe,
-allow the cleaned pipe to drain by standing it upright,
-ensure the cleaning product has drained out com-
pletely (check areas where liquid may be retained,
e.g. gaiters, resonators etc.).
Dry the pipes one by one using a compressed air spray
gun.
For pipes comprising several components:
-assemble the components, taking note of their correct
fitting position (10) .
Refit:
-the air pipe(between the air filter unit and the turbo-
charger) (A) ,
-the air pipe (B) (between the turbocharger and the in-
tercooler).
Refit the intercooler, if fitted to the vehicle (see 12B,
Turbocharging, Intercooler: Removal - Refitting,
page 12B-18) .V - LUBRICATION CIRCUIT**: INSTRUCTIONS
FOLLOWING MECHANICAL DAMAGE TO THE
TURBOCHARGER
Drain the engine oil (see 10A, Engine and cylinder
block assembly, Engine oil: Draining - Refilling,
page 10A-22) .
Replace the oil filter (see 10A, Engine and cylinder
block assembly, Oil filter: Removal - Refitting, page
10A-29) .
Only fill the engine with a suitable oil type (see Engine
oil: Specifications) (Technical Note 6013A, 04A, Lu-
bricants).
VI - GENERAL INSTRUCTIONS TO BE FOLLOWED
WHEN REMOVING A TURBOCHARGER
Always replace:
-the oil supply pipe:
•if the pipe is blocked, even partially (due to scale,
carbonised oil etc.),
•if the pipe is fitted with self-retaining seals.
-the oil return pipe:
•if the pipe is blocked, even partially (due to scale,
carbonised oil etc.),
•if the pipe is fitted with self-retaining seals.
-all seals that have been removed,
-all fittings that have been removed.
When starting the engine:
-do not accelerate,
-allow the engine to run for 1 minute,the time taken for
the oil circuit pressure to increase (until the oil pres-
sure warning light on the instrument panel goes out),
-accelerate several times at no load,
-check the air circuit and the oil circuit for leaks.
112771
Note:
(**) These instructions relating to the lubrication cir-
cuit must always be followed in all cases of
mechanical damage as listed above.
WARNING
Failure to observe the following procedure may lead
to destr uction of the turbocharger.

12B-4
TURBOCHARGING
Turbocharger: Removal - Refitting
K9K
12B
REMOVAL
I - REMOVAL PREPARATION OPERATION
aPosition the vehicle on a two-post lift (see Vehicle:
Towing and lifting) (02A, Lifting equipment).
aDisconnect the battery (see ) (80A, Battery).
aRemove:
-the engine cover,
-the windscreen wiper arms (see Windscreen wip-
er arm: Removal - Refitting) (85A, Wiping -
Washing),
-the scuttle panel grille (see Scuttle panel grille:
Removal - Refitting) (56A, Exterior equipment),
-the scoop under the scuttle panel grille (see Scoop
under the scuttle panel grille: Removal - Refit-
ting) (56A, Exterior equipment),
-the air filter unit (see 12A, Fuel mixture, Air filter
unit: Removal - Refitting, page 12A-13) ,
-the EGR solenoid valve (see 14A, Antipollution,
Exhaust gas recirculation solenoid valve: Re-
moval - Refitting, page 14A-10) ,
-the lower engine tie-bar (see 19D, Engine mount-
ing, Lower engine tie-bar: Removal - Refitting,
page 19D-18) ,
-the catalytic converter (see 19B, Exhaust, Cata-
lytic converter: Removal - Refitting, page 19B-
12) .II - OPERATION FOR REMOVAL OF PART
CONCERNED
aLoosen the clip (1) of the air outlet pipe on the air fil-
ter unit.
aDisconnect the oil vapour rebreathing pipe (2) .
aRemove:
-the air outlet pipe of the air filter unit (3) ,
-the turbocharger oil pipes (see 12B, Turbocharg-
ing, Turbocharger oil pipe: Removal - Refitting,
page 12B-12) . Equipment required
cleaning trough
par ts washer
compressed air nozzle
Tightening torquesm
studs on the turbo-
charger9 N.m
turbocharger nuts28 N.m
121633

12B-5
TURBOCHARGING
Turbocharger: Removal - Refitting
K9K
12B
aPull the intercooler air inlet pipe clip (4) on the turbo-
charger side.
aDisconnect:
-the air-air intercooler air inlet pipe at the turbo-
charger end,
-the turbocharging pressure regulator pipe (5) .
aRemove:
-the turbocharger nuts (6) ,-the turbocharger,
-the turbocharger seal.
aLoosen the turbocharger air outlet pipe clip (7) from
the turbocharger.
aDisconnect the turbocharger air outlet pipe from the
turbocharger. K9K, and 718
141222
141223
K9K, and 740
121639