catalytic converter DACIA SUPERNOVA 2004 Repair Manual

ENGINE E7J-A-2/6010
10 - 2
ENGINE AND LOWER ENGINE UNITS
MOTOR-PROPELLING GROUP
Di smounting and re -mounting the motor-propelling group i s done at the upper pa rt of the
engine compart ment by means of a moving lift ing device. C
OUPLES FO R S
CRE W-FIXING (daNm)
Screws for fixing right-side stand on engine 6,2
Hydro- elastic buffer attachment nut 3,7
Screw-nut for left-side elastic buffer 6,2
Wheel sc rews 7,5
Screws for fixing motor-propelling group-battery stand 2,1
Screw-nut for fixing small connecting rod on steering traverse 6,2
Screw for fixing anti-swing connecting rod on gearbox case 10,5
Control bars attachment screw on gearbox connecting rods 2,7
Car is placed on a lift-stand with two columns;
The fol lowing are taken down: battery, air-
filter case, engine bonnet, front wheels; Oxygen probe connector is taken off;
Dismantle: therm ic protection screen, cata-
lytic convert er on the exhaust collector;
DIS M O UNT ING
The fol lowing are eva cuated:
-the cooling circuit at the bottom par t
of the radiator ;
-the oil in the gearbox ;
-the oil in the engine, if necessary.
The fol lowi ng are ta ken dow n: -engine shield;
-the screws that fasten the catalyti c
converter on the stand;
-the pipe-collar between the catalyti c
converter and the trigger ;
-the catalytic converter;
-the anti-swing auxiliary connectin g
rod.
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19 - 14
19
COOLING - EX HA U ST - FU EL TANK
DISMOUNTING - REMOUNTING EXHAUST
The catalytic converter, when in operation, reaches high tempera-
tures, and consequently m ust not co me in touch with flammable materials, which
would lead to self-combustion. The catalytic converter will be kept out of mechanic shocks.
D
IS M O UNT ING
In order to take apart t he noise-damper system 1, the following opera tions a re to be
performed: The screw-nuts 2 of the fixing collar, between holder 3 and noise-damper 1, are
loosened; The two elastic fixing stands of the damper are taken apart , at the back on the car
bodywork; The noise-da mper system is pulled and taken out.
In order to take apart the assembled holder 4, the following operations are to be performed:
Collar 4 is taken off and the assembled holder is disconnected from the catalytic
converter;
The elastic stands of the assembled holder are taken off;
The scre w-nuts of the fixing collar 2 are loosened and t he a ssembled holder is
taken out by gently rot ating, and pulling it towards the front.
In order to take apart the catalytic convert er system 6, the following opera tions are to
be performed:
The engine shield is taken apart ;
The two screw-nuts 7 for the fixation of the engine shield on the two stud-bolts on
the exhaust gallery flange;
The fixing screws of converter stand 5 are taken off;
The oxygen probe is taken apart;
Collar 4 is taken apart, and t he c atalytic converter assembled on the assembled
holder is disconnected; The catalytic convert er is taken out.
R
EMONTARE
The mounting opera tions are performed in the re verse order.
Make sure there perfect watertightness between the elements of the exhaust system,
by using the Wurth watert ightening paste, along the (i nner part of the) joining stretch,
between the gas expansion chamber and the catalytic convert er ( 0.014 kg), and between
the noise-da mper a nd the expansion chamber ( 0.013 kg);
The fittings of the oxygen probe will be replaced for each taking-apart operation;
The tightening couple between the damper and the holder: 3.5 daNm +/-0.5.
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