1995 RENAULT MEGANE SCENIC check engine

TOP AND FRONT OF ENGINE
Cylinder head gasket
11F8Q ENGINE
REMOVAL
Put the vehicle on a 2 post lift.
Disconnect the battery.
Remove the engine undertray.
Drain the cooling circuit via the lower radiator
hose (radiator end).
SPECIAL TOOLING REQUIRED
TIGHTENING TORQUES (in daN.m)
Wheel bolt 9
Crankshaft pulley bolt 12
Suspended engine mounting cover bolt 6
Suspended engine mounting limiter bolt 4
Tensioner nut 5
EQUIPMENT REQUIRED
Star socket ST X 14 FACOM for example
Star socket EX 255 FACOM for example
Engine support tool DESVIL M300 for example
99174R
Mot. 251-01 Dial gauge mounting
Mot. 252-01 Pressure plate for measuring cylinder liner protrusion
Mot. 1311-06 Tool for removing fuel pipe
Mot. 591-02 Index
Mot. 591-04 Angular wrench for tightening the cylinder head
Mot. 1054
TDC pin
Mot. 1159 Tool for retaining the engine on the sub-frame
Mot. 1202 Hose clip pliers
Mot. 1273 Tool for checking belt tension
Mot. 1281-01 Oil filter wrench
Mot. 1289-03 Fork for centring suspended engine mounting limiter
Remove:
- the timing belt (see section 11 - timing belt),
- bolts (A) mounting the tensioner, together
with bolt (B) for the alternator drive belt ten-
sion strut mounting,
11-22

TOP AND FRONT OF ENGINE
Cylinder head gasket
11F8Q ENGINE
CHECKING THE GASKET FACE
Use a straight edge and a set of shims to check for
gasket face deformation.
Maximum bow 0.05 mm.
The cylinder head may not be re-ground.
99181S
DETERMINING THE THICKNESS OF THE GASKET
Checking piston protrusion
Clean the piston crowns to eliminate any deposits.
Turn the crankshaft in the normal operating direc-
tion by one turn to bring piston No. 1 close to
TDC.
Place tool Mot. 252-01 on the piston.
Fit tool Mot. 251-01 with a dial gauge to the pres-
sure plate Mot. 252-01. The pin of the dial gauge
should be touching the cylinder block; determine
the TDC for the piston.
NOTE : all measurements should be made in the
longitudinal axis of the engine to eliminate errors
due to piston tilt.
99173R
Measure the piston protrusion.
ONLY TAKE INTO ACCOUNT THE DIMENSION FOR
THE PISTON WITH THE MAXIMUM PROTRUSION
For a maximum piston protrusion :
- less than 0.868, use a gasket marked by a tab
with 2 holes,
- between 0.868 and 1.000, use a gasket marked by
a tab with 1 hole,
- greater than 1.000, use a gasket marked by a tab
with 3 holes.
11-26

FUEL MIXTURE
Throttle body
12
E7J engine
REMOVAL
Remove the air filter.
Disconnect:
- connectors (A) (B) and (C),
- the fuel supply pipes (1) and return pipes (2),
- the accelerator control cable (3).
Remove the mounting bolts (4) and remove the
throttle body.
94544R
REFITTING
Replace the seals between the manifold and the
throttle body.
Reconnect:
- the fuel supply and return pipes, ensuring the
connectors are correctly clipped back together,
- the accelerator control and refit the air filter.
AIR TEMPERATURE SENSOR
REMOVAL
Remove the air filter.
Disconnect the connector.
Remove bolt (1) and lift cover (2).
Release the wires from mounting (3).
Remove the connector (4) after releasing hooks
(5).
94541R
REFITTING
Check the connectors are correctly clipped in.
12-8

FUEL MIXTURE
Throttle body
12
E7J engine
INJECTOR
REMOVAL
Remove the air filter.
Remove the air temperature cover (see previous
page).
Remove the injector (6) from its housing.
94539R
REFITTING
Replace the O rings and lubricate them.
Fit the injector and cover so that they are correctly
aligned and mount the assembly.
REMOVING - REFITTING THE FUEL PRESSURE
REGULATOR
The fuel pressure regulator cannot be adjusted if
it is faulty. The upper section of the throttle body
must be renewed.
IDLE SPEED REGULATION MOTOR
REMOVAL
Remove the air filter.
The motor may be removed without having to
remove the throttle body. Access to the bolts is
made easier however by removing the mounting
bolts for the throttle body and releasing it
without disconnecting the fuel pipes.
Disconnect the motor connector.
Remove the mounting bolts and remove the
motor.
REFITTING
No adjustment may be made. However, ignition
on, if the low load switch bargraph on the XR25 is
not illuminated, fit a shim between the throttle
stop and the micromotor to obtain the no load
switch position.
Turn the ignition on then off; the micromotor
should position itself in the cold start position.
Repeat the operation without the shim, then
check the position of the throttle, ignition on,
engine not running, using the XR25 and #17.
94540S
12-9

FUEL MIXTURE
Throttle body
12
E7J engine
THROTTLE POTENTIOMETER
The throttle potentiometer is set in the factory
and cannot be repaired.
If there is a fault, renew the throttle body section.
REMOVAL
Remove the air filter and the complete
monopoint throttle body assembly (see previous
pages).
Remove the upper section of the throttle body
and the idle speed regulation motor.
94538S
REFITTING
Renew the seals.
Refit the throttle body peripherals.
Check:
- the connectors are correctly connected,
- on the
XR25 :
•the bargraphs are present for :
- low load,
- full load.
•the throttle position using the XR25 and
#17.
Refit the air filter.
12-10

FUEL SUPPLY
Pump flow
13
SPECIAL TOOLING REQUIRED
Mot. 1265 Pliers for removing quick release
unions
It is recommended to check the fuel pump flow
using the fuel return pipe connected to the sender
unit assembly.
97163R8
IMPORTANT
During this operation the following points must
be observed:
• Do not smoke and keep all heat sources away
from the working area.
• Take precautions to guard against fuel spray
due to the residual pressure in the pipes when
they are removed.
CHECKING THE PUMP FLOW
Lift the rear seat.
Remove the plastic cover.
Remove the clip (1).
Use tool Mot. 1265 to disconnect the fuel return
pipe (2) (marked by a red quick release union).
Connect an 8 mm semi-rigid pipe to the quick
release union and insert the other end of the pipe
into the 0-2000 ml measuring cylinder.
Shunt terminals (3) and (5) of the fuel pump relay
(located in the engine fuse box). In a period of
one minute the pump flow should be a minimum
of :
- 1.3 litres for F3R - K7M engines,
- 0.83 litres for E7J engines,
for a voltage of 12 Volts.
NOTE : when refitting, ensure the quick release
unions are correctly connected.
If the flow is low, check the feed voltage to the
pump (a drop of approximately 10% is caused for
a drop in voltage of 1 Volt).
EQUIPMENT REQUIRED
1 measuring cylinder 2000 ml
13-10

FUEL SUPPLY
Supply pressure
13
E7J engine
CHECKING THE FUEL SUPPLY PRESSURE
SPECIAL TOOLING REQUIRED
Mot. 1311-01 Fuel pressure test kit
Disconnect the fuel supply pipe (1) from the
throttle body and insert the0 - 10 bars pressure
gauge and the three way union from the test kit
Mot. 1311-01.
99089R
Shunt terminals (3) and (5) of the fuel pump relay
(B) in the engine connection unit (see diagram on
page 13-2).
98756R1
The pressure should be 1.06 bar.
Checking the pump safety valve
If the fuel pressure is correct, feed the fuel pump
and clamp the pipe with the two position valve
for a brief moment. The pressure should stabilise
at approximately 3 bars.
13-11

FUEL SUPPLY
Supply pressure
13
K7M engine
CHECKING THE FUEL SUPPLY PRESSURE
SPECIAL TOOLING REQUIRED
Mot. 1311-01 Fuel pressure test kit (with 0 ;+ 10 bars
pressure gauge included)
Mot. 1311-04 T piece (J union)
Mot. 1311-06 Tool for removing fuel pipes
Disconnect:
- the oil vapour rebreathing pipes and the fuel
vapour recirculation pipes,
99372S
- the fuel supply pipe using small section tool
Mot. 1311-06 (method described in section 13
"Fuel gallery").
99375R
Connect the T piece Mot. 1311-04 to the gallery,
then reconnect the fuel supply pipe to the T piece.
99376R
13-12