1995 RENAULT MEGANE SCENIC engine

FUEL MIXTURE
Inlet manifold
12
K7M engine
Unscrew the steel pipe (11) which goes to the
manifold from the EGR solenoid valve mounting
(release the clip first).
All engine types
Remove the two bolts from under the manifold
which mount the wiring retaining bracket.
99460R
From the manifold, disconnect:
- the pipe (12) connected to the absolute
pressure sensor,
- the pipe (13) connected to the brake servo,
- the fuel supply and return pipes.
Disconnect the two hoses from the canister bleed
solenoid valve (14).
Remove the four lower mounting nuts then the
five upper mounting bolts.
99371R
Remove the manifold.
REFITTING
Renew all gaskets and seals which have been
removed.
Refitting is the reverse of removal.
Remember to reclip the clip mounting the EGR
pipe.
12-17

FUEL MIXTURE
Exhaust manifold
12
E7J engine
Manifold nuts 2
TIGHTENING TORQUES (in daN.m)
REMOVAL
After removing the heat shield from the manifold,
remove the mountings.
99093R
99092S
REFITTING
Renew the gasket systematically.
12-18

FUEL MIXTURE
Exhaust manifold
12
K7M engine
Manifold mounting nut 2
EGR steel pipe bolt 1
TIGHTENING TORQUES (in daN.m)
REMOVAL
Remove the heat shield.
99355R
Remove:
- the two nuts (1) connecting the exhaust
manifold to the exhaust downpipe,
- nut (2) for the steel pipe connecting the EGR
solenoid valve and the manifold; first remove
clips (3) (K7M 703),
- the seven nuts mounting the manifold.
99356R
Remove the exhaust manifold.
REFITTING
Renew the manifold gasket.
Refitting is the reverse of removal.
12-19

FUEL MIXTURE
Manifolds
12
F3R engine
Throttle body mounting bolt
on manifold 2
Manifold mounting nut on cylinder head 2
Manifold mounting stud on cylinder head 1
Strengthening bracket mounting
bolt on exhaust manifold 4
TIGHTENING TORQUES (in daN.m)
NOTE : the fuel gallery must be removed
beforehand (refer to section 13 "Fuel gallery").
The inlet manifold may be removed by itself, but
removing the exhaust manifold requires the inlet
manifold to be removed.
If the manifold gasket is renewed, both manifolds
must be removed.
99229-2R
From below the vehicle:
Use rope to attach the exhaust chamber to the
body.
Remove:
- the 2 mounting bolts (2) securing the
downpipe to the exhaust manifold,
- bolt (3) securing the exhaust manifold to the
strengthening bracket.
99228R
REMOVAL
Put the vehicle on a 2 post lift.
From above the vehicle:
Remove the upper and lower mounting nuts (1)
for the inlet manifold (the 2 nuts (B) at each end
only secure the exhaust manifold).
Remove the inlet manifold.
12-20

FUEL MIXTURE
Manifolds
12
Remove the exhaust manifold. From above the vehicle:
Remove the 2 bolts (B).
DI1207
F3R engine
REFITTING
The manifold gasket should be fitted with the
metal side against the manifold (crimped side
against the cylinder head).
Refitting is the reverse of removal.
12-21

FUEL SUPPLY
Fuel cut-out on impact
13
AIM
The aim of this function is to avoid a fire after an
accident due to a fuel leak. To accomplish this, all
components which pump fuel from the fuel tank
are stopped during and after the impact. They
may only be started again by a mechanical action
performed by the driver or repair mechanic.
DESCRIPTION
The system comprises an inertia switch which may
be reset, which:
- detects the impact (1),
- cuts the electrical circuit.
99511R
It is mounted:
• For petrol engines, between track 1 of the
pump relay (236) and the + feed.• For diesel engines, between the + feed and
the fuel shut off (or the coded solenoid valve
if the vehicle is fitted with an engine
immobiliser).
OPERATION
During the impact, the inertia switch ball leaves its
seat and breaks the electrical current.
For petrol engines, the + feed to the pump relay
control circuit (236) is cut. The pump and the
injectors are thus no longer fed electrically.
The fuel in the fuel tank is therefore isolated.
For diesel engines, the + feed to the fuel shut off
or the coded solenoid valve is cut.
The pump can no longer take up fuel, there is no
high pressure any more. Any risk of fire due to
high pressure diesel spray over the engine is
removed.
RESETTING THE SWITCH AND SWITCH
OPERATION
To reset the inertia switch, press the top to
reposition the ball in its seat.
IMPORTANT:
• for petrol engines, after resetting the switch,
the computer memory
MUST be erased using
the XR25. The injection computer will
memorise a pump relay fault when the system
is triggered.
• for diesel engines, after resetting the switch,
the passenger compartment connection unit
memory
MUST be erased using the XR25. This
unit will memorise a break in feed to the
coded solenoid valve.
13-1

FUEL SUPPLY
Fuel gallery
13
K7M engine
Fuel gallery mounting bolt on manifold 0.8
TIGHTENING TORQUES (in daN.m)
REMOVAL
Disconnect the battery.
Remove the acoustic tie bar.
Disconnect:
- the oil vapour rebreathing pipes (1) and the
fuel vapour recirculation pipes (2),
- the connectors for the injectors (3) and the
canister bleed solenoid valve (4),
- on the manifold, the pipe (5) connecting the
pressure regulator to the manifold vacuum,
99372R
- the fuel supply pipes (6) and return pipes (7)
using the small section tool Mot. 1311-06 (the
fuel supply pipe uses a removal tool
connected to the union fitted on the vehicle).
99375R
SPECIAL TOOLING REQUIRED
Mot. 1311-06 Tool for removing fuel pipe
unions
99370R
13-3

FUEL SUPPLY
Fuel gallery
13
K7M engine
To remove the unions, fit toolMot. 1311-06
between the two parts (A) and (B).
Press on the tool to lift the two retaining claws
then pull the union.
99461R1
Remove the three gallery mounting bolts then
remove the gallery.
99369R
To remove an injector, remove clips (8) then pull
the injectors.
99373R
REFITTING
Renew the O rings at the base of the injectors (if
the injector has been removed, also renew the
seal at the head of the injector).
The fuel supply and return unions should click
when they are correctly connected.
Refitting is then the reverse of removal.
13-4