engine DACIA SUPERNOVA 2004 Service Manual

ENGINE E7J-A-2/6010
10 - 31
ENGINE AND LOWER ENGINE UNITS
CYLINDER HEAD RE-MOUNTING
.The following are to be mounted:
-the jack for c ylinder-head centri ng
on the block; -the new cylinder-head fitting;
-the cylinder-head (aft er the stand
has been taken apart ); the joining surface
cylinder c rankcase- cylinder-he ad is care-
fully cleaned; -the cylinder-he ad scre ws (whose
threads and scre w-ends are oiled).
THE METHOD OF TIGHTENINGT THE CYLINDER-HEAD
1. Pre-compressing the fitting -a l l the scre ws a re tight ened at 2
da Nm, then at 97o+/- 2o, in th e or d er below:
-wait for 3 minut es - the
stabilization delay.
2. Combustion-head tightening-screws 1 - 2 are loosened till they
are totally free;
-sc rews 1 -2 a re ti ghte ne d at 2
daNm, t hen at 97
o+/-2o;
Screws no. 2 are tightened at
2.3 daNm , but nor before oiling the
threads. -the cylinder-head cap, without tight-
ening it (in orde r to be a ble then to set/
tune the distri bution); -the pinion of the crankshaft.
-t he op e ra t i on of l o ose n i ng a n d
tightening is repeated for the scre w groups
3-4-5-6-, then for 7-8-9-10.
The cylinder head is not restricted.To be mounted subsequently:
-the rocker-arm ra mp, by position-
ing marki ng no. 1 on the axis towards the
distribution;
RE CO VERY ENGINE
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ENGINE E7J-A-2/6010
10 - 32
ENGINE AND LOWER ENGINE UNITS
DISTRIBUTION
RECO VERY ENGINE
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ENGINE E7J-A-2/6010
10 - 33
ENGINE AND LOWER ENGINE UNITS
On the back of the be lt there i s an arrow
indicating the direction of rotation, and two
tuning marks; -the L line-up marks on the crank-
shaf t pi nion are aligned with the fixed mark M;
(the mark on the
pinion of t he cam-shaft in
down)
CAU T ION!
The pinion of the cam-shaft
ca n have five line-up marks: it is only
th e rectangular-shaped mark on the
face of a cog that represents the Up-
per Ce ntre Point, all the others serv-
ing to adju st the rocker arms.
-the marks on the belt are aligned
w ith those on the pi nions, observing t he
direction of mounting and be ginning from
the pinion of the crankshaft;
-the captor of the MOT 1505 appa-
ratus is placed (held in the position indi-
cated in the schema) at 5-10 mm to t he
belt. Any of the two captors can be used on
condition the t wo of them should not be
placed simultaneously in front of the belt.
The distribution belt is set in vibration (the
m easurement is validated by a beep of the apparatus).
-the belt is stretched by opera ting t he
str etching runner/pulley, until a value within
210 and 275 Hz is obtained;
-the stretching device is blocked, and its
screw-nut is tightened at 3 daNm;
-the crankshaft is wound 5 1/2 rotations
(no. 2 cylinder in the position of rocker-arm
adjustment); -the screw-nut of t he runner/ pulley is
stretched until a value between 145 and 185
Hz is obtained.
CAU T ION!
If the value of 275 Hz is ex-
ceeded, the belt can no longer be used,
and it ha s to be changed.
-the 0 screw-nut of the runner/pulley is tight-
ened at 5 daNm.
If not, this may get dismounted, ri sking the
engine damaging.
G
ENERAL DIREC TIONS
The stretching of the belt should only be done
for th e co ld engine mode (i.e. ambient temperature);
-a belt which has been taken off must not be re-
mounted - it will have to be replaced by a new one.
DISTRIBUTION
RECO VERY ENGINE
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ENGINE E7J-A-2/6010
10 - 34
ENGINE AND LOWER ENGINE UNITS
It is done only for the cold engine mode.
The adjustment values are:-intake 0.10 mm
-exhaust 0.25 mm
1. Cam-Shaft pinion without line-up marks
a) The method called “in balance”
Th e cylinder valves in balance (end of
exhaust; start of intake)
1
3
4
2
The cylinder rocker-arms are adjusted
4
2
1
3
b) The method called “exhaust valve opened to the maximum”
The engine is wound (c lockwise, as seen from the distribution) t ill t he e xhaust va lve
of cylinder no. 1 reaches maximum opening, and t he play is adjusted for the intake
valve of c ylinder no. 3, and also for the exhaust valve of cylinder no. 4.
The same is done for the other cylinders, as in the chart :
Exh aust valve open to the
maximum
1
3
4
2
Intake valve to be adjusted
3
4
2
1
Exhaust valve to be adjusted
4
2
1
3
ADJUSTMENT OF ROCKER-ARMS
RECO VERY ENGINE
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ENGINE E7J-A-2/6010
10 - 35
ENGINE AND LOWER ENGINE UNITS
2. Cam-Shaft pinion with line-up marks:The engine is wound until it reaches the Upper center point (c ylinder no. 1 at
ignition), then furt her up to the first line-up mark.
-what is adjusted: exhaust 1
exhaust 3
-for the second mark:
-what is adjusted: intake 1
intake 3
-for the third mark:
-what is adjusted: exhaust 2
exhaust 4
-for the fourth mark:
-what is adjusted: intake 2
intake 4
ADJUSTMENT OF ROCKER-ARMS
RE CO VERY ENGINE
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ENGINE E7J-A-2/6010
10 - 36
ENGINE AND LOWER ENGINE UNITS
After the tu ning of the distri bution and the adjustment of the rocker-arms, the
following are further re-m ounted: -the cylinder-head cap, fitted with a new fitting; the screws are tightened at 1 daNm;
-the water-intake conduit and t he oil-level gauge guide (with new watert ight-
sealing ri ngs); -the cap of the distribution;
-the pulley of the crankshaft; the screw is first tightened at 2 daNm, then at 68
o+/-6o.
C
AUTION!
If the screw is not duly tightened, it c an come undone, which c an result in t he oi l-
pump not being operated and the distribution being disrupted, thus causing serious
damage to the engine.
-the intake and exhaust collectors: the screws are tightened at 2.5 daNm;
-the belt(s) of accessories: the same method as that for the distribution belt is used.
The stretching values are :
* alternator belt 263+/-10Hz
* Air-Comditioning (A.C) compressor belt 222+/-10Hz.
RECO VERY ENGINE
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ENGINE E7J-A-2/6010
10 - 37
ENGINE AND LOWER ENGINE UNITS
TIG H TENING CO UPL E S (daNm)
Screws for fixing at front of motor-propelling frame 6.2
Screws for fixing at back of motor-propelling fram 10.2
Lower crankcase screws 1
Screws for fixing steering wheel lower axis 1.4
Screws of wheel 7.5
Screw of the ball-and-socket joint 5.5
Screw-nut of the steering ball-and-socket joint 3.5
Screw for fixing anti-swing auxiliary connecting rod (on frame) 6.2
Screw for fixing anti-swing auxiliary connecting rod (on gearbox) 10.5
D
IS M O UNT ING
The c ar i s placed on a l ifting stand with
two columns; The battery i s disconnected;
The engine is emptied of oil;
The engine-shield is taken apart ;
To take apart :
-front wheels;
-screw-nut for fixing the lower steer-
ing wheel axis on the pinion of t he steer-
ing case; -the steering ball-and-socket joints
and the arm ball-and-socket joints; -side clearance devices;
-thermic protection screen;
-catalytic convert er;
-front bumper ba r;
-anti-swing auxiliary connecting rod.
The screws for fixing the motor-propelling
s et fra me are taken a part, and the frame is
lowered; The lower c rankcase is taken apart.
R
E-MOUNT ING
The lower c rankcase is cleaned.
A ca. 3 mm-thick girdl e of RHODERSEAL
5661 is applied, as in the adjoining drawing. Do not forget to replace the two cres-
cent-sha ped fitti ngs at the e nds of the
crankcase.
Mind that the relative displacement be-
tween the lower crankcase and the cylin-
d er crankcase, along the gearbox-assem-
b ly surface, should not exceed 0.3 mm.
LOWER CRANKCASE MOUNTED ON THE CAR
LOWER CRANKCASE
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ENGINE E7J-A-2/6010
10 - 38
ENGINE AND LOWER ENGINE UNITS
DIS M O UNT ING
The oil in the engine is emptied.
The following are taken apart: - Motor-Propelling set frame;
- lower crankcase.
The screws for fixing the oil-pump on the crankcase are taken apart;
The carrying chain is taken off the oil-pump pinion;
The cap of the oil-pump is taken apart.
The play of the pinions in the oil-pump is checked.
R
E-MOUNT ING
The dismantling operations are done in the re verse order.
Motor-oil filling-up i s done.
The pressure of the oil at 80
o is checked:
idle mode: 1 bar
4000 rot/minute 3 bar Sc
rews for fixing oil-pum p 2.5
Sc rews for fixing oil-pum p cap 1 T
IG H TENING CO UP
LES (daNm)
OIL-PUMP ON THE CAR OIL-PUMP
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ENGINE E7J-A-2/6010
10 - 39
ENGINE AND LOWER ENGINE UNITS
TIGHTENING COUPLES (daNm)
Screws for fixing combustion-head cap1
S crew-nut for stretching distribution belt runner/pulley 5
Screws and screw-nuts M 6 for water-pump 1
Screws and screw-nuts M 8 for water-pump 2.2
Screw of the crankshaft pulley 2+68
o+/-6o
Screw of cam-shaft pin 4.5
Screws of rocker-arm ramp 2.3
S crews of flywheel 5 - 5.5
Screws of oil-pump 2.5
Screws of oil-pump cap 1
Screws of bearing caps 2.5+43
o+/-6o
Screws of combustion-head 2+97o+/-2o
Screws of the exhaust gallery 2.5
Screws of the intake gallery 2.5
Sparking plugs 2.5 - 3
Screws of the oil-crankcase 1
Screws for rocker-arm adjustment 1.5
Emptying jack 2
S crews of the connecting rod caps 4.2
Oxygen probe 4.5
TIGHTENING COUPLES
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ENGINE E7J-A-2/6011
UPPER AND FRONT ENGINE UNITS
Tightening couples (daNm)
Screws of wheels7.5
Screw of the crankshaft pulley 2+68
o+/-6o
S crew-nut of stretching runner 5
Screws right-side stand 6.2
Screw-nut hydroelastic buffer 3.7
DISMONTING
The car is placed on a lifting stand.
The fore part of the engine is proppe d
on the frame using the MOT.545 device.
The following are taken apart: -front right-side wheel;
-the right-side pendular suspension;
11 - 1 -the alterna tor belt;

-the carrying belt of the compressor
(AC) ;
-the pulley of the crankshaft and its hub;
-the carryi ng pulley of the compressor;
-the distri bution crankcases.
DIS TRIBUTION BELT
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