ESP RENAULT CLIO 1997 X57 / 1.G Petrol Engines Workshop Manual

ENGINE AND PERIPHERALS
S
pecifications10
VALVE CLEARANCES (in mm)
- Inlet0.10
- Exhaus
t0.25
Hei
ght of cylinder head
10032R
H = 113 ±
0.05 mm
Maximum deformation of
gasket face: 0.05 mm.
No re
grinding is permitted.
C
ylinder volume with valves
and s
park plugs:
26.25 ±
0,6 cm3
Spark plug tightening torque: 2.5 to 3 daN.m
VALVES
Diameter of the stem (mm) :
7
Port an
gle
- Inle
t120°- Exhaust90°
Head diameter (mm)
- Inlet37.5 ±
0,1
- Exhaust33.5 ±
0,1
WARNING: When valves are re
placed, it is essen-
tial to refit
(new) valves with the same part num-
ber
(1) as the previous ones, in order to prevent
an
y damage to the valve and seat.
10030R
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 the new valves with a different
markin
g do indeed correspond to the same part
number.
10-11
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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
10-38
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ENGINE AND PERIPHERALS
En
gine repair10
PREPARATION OF THE GUDGEON PINS
Check that the gudgeon pins are able to slide
freely in the corresponding new pistons.
Use centring device
C13 and mounting tools
A13
or
A13-01 for the shouldered gudgeon pins.
Mount the gudgeon pin (E) on the mounting tool
(A), tighten the centring device (C)
until contact is
made, then slacken b
y a quarter turn.
76716R PREPARATION OF THE CONNECTING RODS
Visually check:
- the condition of the connecting rod (twisting -
straightness),
- the bearing surface between the shells and the
connecting rod bodies (if necessary, remove
any burrs with a grinding wheel to obtain a co
r-
rect bearing surface).
Use a
1500 W heating plate.
Put the little ends on the heating plate.
Ensure that the whole surface of the little end is in
contact with the plate.
Put a piece of self-pickling tin solder with a mel-
ting point of about
250
° onto each little end at (a)
to act as a temperature check.
Heat the little end until the piece of self-pickling
solder melts.
DI1038
12367R
10-39
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ENGINE AND PERIPHERALS
En
gine repair10
There is an arrow painted on the back of the belt
showing the direction of rotation and two marks
for the setting.
Line up the marks (N) on the belt with those on
the sprockets (L) and the housings (M).
Respect the direction of mounting of the belt and
begin to position it on the crankshaft sprocket.
Fit the sensor of
Mot. 1273.
98708R
Turn the knurled wheel of the sensor until it re-
leases (three "clicks").
Tension the belt using tool
Mot. 1135-01 until
the display of the
Mot. 1273 shows the re-
commended fitting value
.
Belt tension (in SEEM units)
Fitting value: 30 U.S.
Lock the tension wheel, carry out a check and ad-
just the value.
Rotate the crankshaft at least
three turns.
Check that the tension value is within the fitting
tension tolerance (
±10 %), and if not readjust it.
NOTE : Never refit a belt which has been remo-
ved.
Tighten nut (O) of the tension wheel to 5 daN.m.
It is essential to tighten the tension wheel nut to
a tor
que value of 5 daN.m to prevent any risk of
working loose which might damage the engine.
WARNING: Certain camshaft s
prockets have five
marks, but onl
y the rectangular mark on the face
of a tooth shows the TDC. The other marks are
used for ad
justing the valve rockers.
10072S
Only the camshaft sprockets with marks will be
available in future from the Parts De
partment.
10-47
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