DACIA SUPERNOVA 2004 Service Manual

ENGINE E7J-A-2/6010
10 - 17
ENGINE AND LOWER ENGINE UNITS
DISMOUNTING AND RE-MOUNTINGTHE CYLINDER HEAD
RECO VERY ENGINE
vnx.su

ENGINE E7J-A-2/6010
10 - 18
ENGINE AND LOWER ENGINE UNITS
DIS M OUNT ING
The oil and the cooling fluid are empties.
To be taken off:
-the electric connections;
-the alterna tor and its belt;
-the pulley of the crankshaft (in order to do that, t he flywheel is bl ocked with the
MOT 582 device)
-the protection cap of t he distri bution belt RE
CO VERY ENGINE
CYLINDER HEAD
vnx.su

ENGINE E7J-A-2/6010
10 - 19
ENGINE AND LOWER ENGINE UNITS
The e ngine i s brought to t he t uning point, by aligning t he line-up mark on the crankshaft
pinion L with the fi xed marks M (the L mark i s held with the cams upwards). The screw-nut of t he stretching runne r is undone, then the belt is taken off.
(1) The stretching dire ction of the stre tcher.
RE CO VERY ENGINE
vnx.su

ENGINE E7J-A-2/6010
10 - 20
ENGINE AND LOWER ENGINE UNITS
DIS M O UNT ING
The following are to take off:-the cylinder head cap;
-the intake and exhaust collectors;
-the cylinder head screws, except the
sc rew where the centring jack is; this one
is only loosened;
-the c ylinder head is re volved round
the screw which was left in place; -the cylinder he ad is taken off;
-t he j a c ke t -m a inta i ni ng de vi c e -
MOT.484 - is mounted.
.To be mounted:
-the rocker arm ramp:
-the oil-sealing of the cam-shaft;
-the flange of the cam-shaft ;
-the pi nion of the c am-shaft , which is
blocked with MOT 799 - 01 ;
-the cam-shaft;
-the stand of t he thermostat;
-the sparking plugs;
-the springs of the valves;
-the valves;
-the oil-seals of the valves, by using the
MOT. 1335 pincers.
The cylinder head is cleaned of the fit-
ting which is left stuck to it.
It is very important not to ge t the po-
sit io nin g surface of the fittings
s cratched.
Use Decapjoint to remove t he re mains
of fittings that are left stuck. The ab ove produc t is applied on the
cleaning are a; wait ca. 10 minutes, then
clean by means of a wooden spatula.
CYLINDER
HEAD
MOT. 484
RECO VERY ENGINE
vnx.su

ENGINE E7J-A-2/6010
10 - 21
ENGINE AND LOWER ENGINE UNITS
CAU T ION!
Avoid introducing foreign bodies
into the oil grooves and tubes; you may
risk blocking up the holes of the rocker
arms and rapidly deteriorating the
cams an d the gliding parts of the
rocker-arms.
The checking of the planeness of the
cylinder he ad i s to be done with a rul er
and a set of t hickness gauges
Maximum distortion allowed: 0.05 mm.
No rectification of t he combustion he ad
is authori zed.
R
E-MOUNTING
Oil all the parts.
Mount the valve oil-seal rings no. 2 by
means of a tubular-wrench of 11 size onto
the valve guides no. 3;
Mount in the fol lowing order:
-the washers no. 1 at the base of the
valve springs;
-the new valves no. 4.
-the springs no. 5 are identical for
both intake and exhaust; -caps no. 6;
Compress springs no. 5, then m ount the
s emi-cones no. 7, which are identical for
both intake and exhaust.
CYLI NDER HEAD
CAU T ION!
They must have the same line-up
marking (8) as the old ones in order
to avoid the destruction of the valve -
stool set.
RE CO VERY ENGINE
vnx.su

ENGINE E7J-A-2/6010
10 - 22
ENGINE AND LOWER ENGINE UNITS
To mount: -camshaft annular oil seal by
means of t he MOT 1127-01 device;
-the thermostat stand.
Fo r watertight sealing, use Loctite 518.
Gir dle H must be 0.6mm up t o 1 mm
thick; it is applied in keeping with the fol-
lowing schema:
-the pinion of the cam-shaft is fixed
w ith the MOT 799-01 device, then the
thread and the end of t he scre w are oiled
and the scre w is tightened at 4.5 daNm.
CYLINDER HEAD
R
E-MO UNT ING
Oil the cam-shaft .
Mount the cam-shaft and its flange.
Check the axial play, which has to be
within 0.06 mm and 0.15 mm; in case it
does not fi t, check the flange or the cam-
shaft.
RE CO VERY ENGINE
vnx.su

ENGINE E7J-A-2/6010
10 - 23
ENGINE AND LOWER ENGINE UNITS
THE CYLINDER CRANKCASE
RECO VERY ENGINE
vnx.su

ENGINE E7J-A-2/6010
10 - 24
ENGINE AND LOWER ENGINE UNITS
DIS M O UNT ING
The following are dismounting:-the water conduit and the oil-l evel-
gauge guide; their watert ight sealing is
done with rubbe r rings which must be re-
placed for every dismantlement; -the clutch;
-t he engine flywhe e l, bl oc ked by
means of MOT 582;
-the lower c rankcase;
-the pinion of the crankshaft;
-the stretching runner/ pulley;
-the water-pump;
-the oil-pump
Per f o r m co nn e cting rods caps
identification in regards t o connecting rod
body. To
be taken off:
-the caps of t he connecting rod a nd
the bushes;
-the jacket-maintaining device;
the jacket-piston-rod set; -the bearing caps and their bushing;
-the shaft and the axial play bushes;
-the bushes on the block.
The axes of the pistons are taken apart .
The piston is placed on i ts stand, after
positioning the piston bolt (a xis) with the
release hole (t wo lines T for position-find-
ing the centre of the hole will make align-
ment easier). The bol ts are taken off in a pressing-
machine by means of the E extraction
CAUTION!
Do not use punchers for line-
up m arking in order to avoid fis-
sures; use an indelible pen.
THE CYLINDER CRANKCASE
RE CO VERY ENGINE
vnx.su

ENGINE E7J-A-2/6010
10 - 25
ENGINE AND LOWER ENGINE UNITS
Re-Mounting
Cl e a n t he c ra nkc a se, e spe c ial ly t he
jacket-sealing part .
Preparation of the pi st o n- and-jacket set
The parts supplied in the collection are
matched. Do the line-up marking of the set, from
A to D, in orde r to keep the pa rts matched.
Remove completely the anti-rust fi lm;
never era se the parts.
These engines are equipped with rub-
ber rings for jacket watertight-sealing;
these rings ensure only watertight-seal-
ing condition. The jackets lean directly
against the cylinder cra nkcase; extra
height X is achieved by the manufac-
turer.
The checking-up of the jacket extra -
height is done in the fol lowing way: -the jackets a re pl ace din the block
without their sealing-ring;
-extra-h eight X is checked by
means of the MOT.251 and MOT.252-01
devices.
THE CYLINDER CRANKCASE
RE CO VERY ENGINE
vnx.su

ENGINE E7J-A-2/6010
10 - 26
ENGINE AND LOWER ENGINE UNITS
RE-MOUNT ING
The jackets are positioned such a way as:
-the difference be tween two succes-
sive jackets should be max. 0.05 mm; -the extra-height should be placed i n
ascending order between cylinder s 1 and 4.
-the extra-height X must be within
0.02 mm and 0.09 mm;
-in case there is an erroneous extra -
height, it is c hecked a gain by means of a
new set of jackets in orde r to see whether
the cause is the block or the jacket; if not,
check the theore tical values of both the
block and the jackets. The A, B, C, D set is done over with
the correct extra -height obtained, then the
jackets, the bolts and the pistons are num-
bered from 1 to 4 (no. 1 towards the fly-
w heel), so that t he concorda nce with t he
corresponding connecting rods is found.
The axes of the pistons a re m ounted by
means of the MOT 574-22 device.
The axes of the pistons are fixed in the
rod, and loose in the pistons.
Check i f the axes of t he pistons slide
freely in the new corre sponding pistons.
The axis of piston E is mounted on the
mounting axis A.
The C centring device is screwed up to
the end and then unscrewed a quart er of a
rotation.
THE CYLINDER CRANKCASE
In order to heat the connecting rods an
electric range of 1 500 W is used.
RECO VERY ENGINE
vnx.su