RENAULT CLIO 1997 X57 / 1.G Petrol Engines Owner's Guide

ENGINE AND PERIPHERALS
En
gine repair10
- the camshaft seal,
- the camshaft flange,
92078R
10010S
- the camshaft,
- the fuel pump (if fitted),
- the distributor with the ignition wiring loom,
- the thermostat housing,
- the spark plugs,
- the camshaft sprocket, after immobilising i
t
with
Mot. 799-01.
Compress the valve springs (e.g. with
FACOM tool
U43L).
Remove the collets, the upper cups, the springs,
the valves, the valve seals using the pliers
Mot.
1335 and the lower cups. The wearing of gloves is recommended during
this operation.
Do not allow any product to drip on to paintwork.
We would like to stress that the utmost care
should be taken in carr
ying out this operation to
prevent foreign bodies from penetrating the
pipes feeding oil under pressure to the camshafts
(pipes located both in the cylinder block and in
the c
ylinder head) and in the oil return pipe.
Failure to follow this instruction would in fact ris
k
blocking the nozzles of the valve rockers and qui-
ckly causing damage to the rocker cams and fin-
gers. Cleanin
g
It is very important not to scratch the sealing
faces of aluminium parts.
Use the product Decapjoint to dissolve any part of
the seal which remains.
Apply the product to the part to be cleaned; wai
t
about ten minutes, then remove it by means of a
wooden spatula.
10-29
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ENGINE AND PERIPHERALS
En
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CHECKING THE GASKET FACE
Using a rule and a set of shims check whether
there is any deformation of the sealing face.
Maximum deformation:
0.05 mm
No re
grinding of the cylinder head is permitted.
10011S
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88988-1R
ENGINE AND PERIPHERALS
En
gine repair10
REGRINDING OF THE VALVE SEATS
Inlet
- seat width (mm) :
X = 1.7 ±
0.1
- angle :
α = 120°
The seat (1) is re-cut using
cutter 208, angle 31°.
Reduce the width of this seat at (2) with cutter
n
°
212 angle
75° until width (X) is obtained.
NOTE: Observe the position of the valve on its seat.Exhaust
- seat width (mm) :
X = 1.7 ±
0.1
- angle :
α = 90°
The seat (1) is re-cut using
cutter 204, angle 46°.
Reduce the width of this seat at (2) with cutter
n
°
273angle
60°until width (X) is obtained.
91880R2
10-31
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ENGINE AND PERIPHERALS
En
gine repair10
REFITTING THE CYLINDER HEAD
Lubricate all the parts.
Fit the valve spring seating washers (1).
Fit the seals (2) on the valve guides (3) using an 11
mm tubular socket wrench.
WARNING: When valves are bein
g replaced, it is
essential to refit
(new) valves having the same
markin
g (8) as the previous ones, in order to pre-
vent an
y damage to the valve and seat.
The same
part number can cover several mar-
kin
gs, and in this case the valves are fully inter-
chan
geable.
Sim
ply check that any new valves with a marking
different from the previous ones do indeed corre-
s
pond to the same part number.
10030R1
Refit in the following order:
- the new valves (4),
- the springs (5) (identical for the inlet and ex-
haust),
- the cups (6).
Compress the springs.
Fit the collets (7) (identical for the inlet and ex-
haust valves).
77678R3
10-32
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ENGINE AND PERIPHERALS
En
gine repair10
- the distributor with the wiring loom,
- the fuel pump (if fitted) with new seals,
- the thermostat support, making it tight with
Loctite 518.
The bead (H) should be
0.6 to 1 mm wide and
should be applied as shown in the diagram be-
low,
- the seal, using mounting bush
Mot. 1127-01;
this tool is designed to obtain an offset seat fo
r
the seal,
92102S92066R
Lubricate the camshaft.
Refit the camshaft and its flange.
Check:
- the end play which should be between
0.06 and
0.015 mm; if this is not the case, the flange o
r
the camshaft are to blame,
92102-1R
- the camshaft sprocket, immobilising it with tool
Mot. 799-01, and tighten the bolt to a torque
value of
4.5 daN.m (lubricate the thread an
d
underneath the bolt head).
10-33
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ENGINE AND PERIPHERALS
En
gine repair10
EXPLODED VIEW OF CYLINDER BLOCK
PRO10.2
10-34
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ENGINE AND PERIPHERALS
En
gine repair10
Remove:
- the coolant pipe and the dipstick guide (these
pipes are made water-tight by means of O-rings
which must be replaced after each removal
operation),
- the clutch mechanism and disc,
- the flywheel, immobilising it with the aid of
tool
Mot. 582-01,
- the sump,
- the crankshaft sprocket.
If necessary, use the locally manufactured tool
with the shaft protector end protector
Rou. 15-01.
NOTE :
The crankshaft sprocket can be fitted in one of
two ways:
- sprocket with keyway mounted on the cranks-
haf
t
- sprocket with keyway integral with it.
The two fittings are not interchangeable.
Remove:
- the crankshaft cover plate,
87069R
92311R
92171R
- the pulley, A 12 mm diameter, 1.75 mm thread pitch
B 1 hole, 13 mm diameter
C 2 holes, 6.5 mm diameter
D 12 mm diameter nut, 1.75 mm thread pitch,
welde
d
10-35
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ENGINE AND PERIPHERALS
En
gine repair10
- the water pump,
92312R
- the three bolts mounting the oil pump sprocket
on the hub, and remove the sprocket and chain
assembly,
- the oil pump.
Carry out the marking of the big end shells with
reference to their bodies.
WARNING: Do not use a scriber tool for the mar-
kin
g, in order to avoid starting any cracks in the
connectin
g rods .
Use an indelible
pencil instead.
Remove:
- the big end shells and the bearings,
- the liner clamps
(Mot. 588),
- the "liners - pistons - connecting rods" assem-
blies,
- the bearing shells with their bearings (mar
k
them),
- the crankshaft (recover the side clearance
shims),
- the crankshaft bearings in the cylinder block.
EXTRACTING THE GUDGEON PINS
Place the piston on the "V" of the support with
the pin lined up with the clearance hole (two
marks (T) showing the centre of the hole assist this
alignment).
Use the extraction mandrel (E) to remove the
gudgeon pin on the press.
76555R
10-36
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ENGINE AND PERIPHERALS
En
gine repair10
80437R ENGINE REFITTING
Clean the cylinder block, particularly the liner
supporting surface inside it.
Pre
paration of the "pistons-liners" assembly
The parts supplied in the set are matched.
Mark all the parts from A to D in order to retain
the matching.
Dissolve the rustproofing film completely.
Never scratch the
parts.
CYLINDER LINER PROTRUSION
These engines are equipped with liner base O-
rings.
The O-rings are only provided for sealing
purposes.
The liner rests directly on the cylinder block and
their protrusion (X) depends on thei
r
manufacturing dimensions.
75615R5
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ENGINE AND PERIPHERALS
En
gine repair10
The amount of protrusion (X) must be checked as
follows:
- place the cylinder liner,
without its O-ring (J), in
the cylinder block,
- check the protrusion with tools
Mot. 251-01
and
Mot. 252-01.
The protrusion (X) should be between
0.02 and
0.09 mm.
Position the liners so that:
- the difference in protrusion between two adja-
cent liners does not exceed
0.05 mm (within the
tolerance),
- the amount of protrusion reduces from cylin-
der No.
1 to cylinder No.
4 or vice-versa.
85404R1
92278S
When the correct protrusion has been obtained,
re-form assemblies
A, B, C and D, then number the
liners, the pistons and the gudgeon pins from
1 to
4 (No.1 on the flywheel side) in order to match up
with the corresponding connecting rod.
If the protrusion is incorrect, check with a set of
new liners in order to find out whether the faul
t
lies in the cylinder block or in the liners; other-
wise, check the theoretical dimensions (see
"Specifications" section).
FITTING THE GUDGEON PINS
The gudgeon pins are press fitted on the
connecting rods and are fully floating in the
pistons. Use tool
Mot. 574-2 supplied in a kit
containing:
- a piston support base (S),
- an extraction mandrel (M),
- piston support rings (B),
- mounting pins (A) with their centring devices
(C).
76554R2
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