1995 RENAULT MEGANE SCENIC engine

TOP AND FRONT OF ENGINE
Cylinder head gasket
11 F3R ENGINE
Remove:
- the timing belt (see section 11-Timing belt),
- the spark plug caps.
98899R
98900S
Disconnect:
- the pinking sensor,
- the cylinder reference sensor,
- the absolute pressure sensor and its pipe,
- the idle speed valve,
- the air and coolant sensors,
- the throttle potentiometer,
- the injectors,
- the canister solenoid valve pipe,
- the oil vapour rebreathing pipe,
- the brake servo pipe,
- the accelerator cable,
- the fuel supply and return pipes (gallery end),
- the coolant temperature sensor (9).
Remove:
- the air filter,
- hoses 3, 4, 5, 6, 7, 8,
99222R
11-17

TOP AND FRONT OF ENGINE
Cylinder head gasket
11 F3R ENGINE
96529R1
Lift the engine slightly.
Fit tool Mot. 1159 under the oil pump.
Note : cut the base of tool Mot. 1159 to 30 mm.
99023R2
- the earth strap,
- the timing belt tensioner (10),
- the two bolts (11) mounting the upper inner ti-
ming cover,
- the exhaust downpipe,
- the exhaust strut,
- mounting bolt (12) for the water hose.
99025R
99024R2
11-18

TOP AND FRONT OF ENGINE
Cylinder head gasket
11 F3R ENGINE
99028R
Remove:
- the throttle body,
- the fuel gallery.
Note : ensure that seals (13) do not fall off when
removing the pump, Diagram for drilling tool Mot. 1159 for use with
BA0X (diameter 10.5 mm).
Fit the bracket of tool Mot. 1159 under the water
pump.
99310R
99215R
Remove the engine support tool DESVIL M300 for
example.- the cylinder head bolts, using a 10 mm, long allen
key,
FACOM ST10L for example.
- the cylinder head.
11-19

TOP AND FRONT OF ENGINE
Cylinder head gasket
11 F3R ENGINE
CLEANING
It is very important not to scratch the gasket faces
of parts in aluminium.
Use Décapjoint to dissolve any gasket remaining
on the metal.
Apply the product to the area to be cleaned; wait
approximately ten minutes then remove using a
wooden spatula.
Gloves should be worn during this operation.
Remember that this operation should be carried
out with extreme care to avoid the risk of foreign
bodies being introduced into the oilways bringing
oil under pressure to the camshaft (oilways are
located in both the cylinder head and the cylinder
block).
If this recommendation is not observed there is a
risk that the rocker jets may become blocked and
damage may occur rapidly to the rocker cams and
tappets.
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.
87474S
11-20

TOP AND FRONT OF ENGINE
Cylinder head gasket
11 F3R ENGINE
ADJUSTING THE LONGITUDINAL MOVEMENT
LIMITER
Slacken limiter bolts (E).
Insert the limiter centring fork Mot. 1289-03 into
the openings in the suspended mounting cover.
REFITTING(special notes)
The cylinder head is centred by two dowels.
99026R
Tighten the cylinder head (see section tightening
the cylinder head).
Refitting is the reverse of removal.
Fit the limiter assembly plus the suspended engine
mounting cover.
99166-1R
Tighten the 2 bolts (E) to a torque of 5 to
6.5 daN.m.
Fill and bleed the cooling circuit (see section 19).
Adjust the accelerator cable.
11-21

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
- the exhaust flange at the manifold outlet,
- the air filter,
- the earth strap,
- the fuel return union on the injection pump,
together with the mounting bracket on the
manifold,
- the mounting bolts for the inner timing cover
on the engine block.
95658-4R
Remove the oil filter.
Release the wiring from the alternator and move
the wiring to one side. Fit tool Mot. 1159 under the oil pump.
Note : cut the base of tool Mot. 1159 to 30 mm.
99023R2
99024R2
11-23

TOP AND FRONT OF ENGINE
Cylinder head gasket
11F8Q ENGINE
99028R
Diagram for drilling tool Mot. 1159 (diameter 10.5
mm).
Fit the bracket of tool Mot. 1159 under the water
pump.
99310R
98904S
Disconnect:
- the thermostat hoses,
- the connectors for the sensors,- the brake servo pipe,
- the 2 oil vapour rebreathing hoses on the decan-
ter,
- the accelerator cable,
- the preheater plug connector,
- the injection pump connectors,
- the solenoid valve pipes,
- the fuel supply pipe to the diesel fuel filter using
tool Mot. 1311-06
99461R
Remove the cylinder head bolts using the star
socket 55 toolEX 255
FACOM for example.
11-24