air filter Citroen CX 1983 1.G Workshop Manual

Downloaded from www.Manualslib.com manuals search engine 1. HYDRAULIC FLUID :
\~ir/~rol 6jr/rol,/ir j111icl ( LHM ) is the only suitable type and must be used to the exclusion of all others in the
hydraulic system of the car.
This LHM fluid is gt~‘~,l
iv c-o/or/~ and similar to engine oil.
The use of nr!~’ oih~~- rc,otll$
twirl the rubber rinqs and seals in the system 2. RUBBER UNITS AND PARTS :
Suitable components are identified by their grcc’r/ colo/~r and may only be replaced by gc~rttri~ro wplor-c~t~~c~nf
col,,pollc,l/fs painted or marked in green.
All rubber components (joints, hoses, diaphragms, etc . . . ) are of a
spvcirfl qtrnlif), ior ~/.SCJ wifh idlfM (Iuid and are
identified by their white or green colour, 3. STORAGE :
ix Components must be stosed /11i1 o/ /Irlirl nr~tl blor~k~rl o!j: Like the piping they must be protected against shock
E and the inqress of dust
7 Rubber tubing and joints must be stored away from dust. air, light and heat.
al
co
0 LHM hydraulic fluid must be stored in its original containers carefully sealed We advise the use of litre ( for
: toppinq up ) or five litre containers ( for refillinq ) to avoid havinq to keep opened containers.
2
2 T-, 4. CHECKS BEFORE CARRYING OUT WORK :
Z +
c
E Before working on the hydraulic system in case of incorrect operation, ensure the following :
a
a a) T/FOI the c-r>ufrol.y or f/l<, rnc~ch~uir~~l livkrrgc~s o/ //I(’ uuits or f/lo gmltp o/ h\~d~c~u/i~ ~~~~it.s in(nln>d are HO/
lt?
sfi]/ it) o/~c,rnfiou.
b) and that the 111’ c-ire-/ii/ is ////(/(jr /~I.(Jss/II.(J. as follows :
With the engine at idling speed :
- Unscrew the pressure-release screw on the pressure requlator by one or one and one half turns : a sound
, of leakage should be heard from the requlator.
= Retighten the release screw : cut-out must occur which results in a reduction in the running noise
emitted by the H P pump.
If not check in the following sequence
- that there is sufficient fluid in the reservoir,
- that the reservoir filter is clean and in good condition,
= that the H.P pump is primed and there is no air leak on the suction side of the pump,
- that the release screw of the pressure requlator is correctly tightened

Downloaded from www.Manualslib.com manuals search engine I. CHARACTERISTICS
:
0
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5 Cooling system : Water cooled.
z
T cx 2000 cx 2200 CX 2400 and Prestige
CX 2400 GTI
- Type ( on engine p’late ) : _..._................... M 20/616 M 22/617 M 23/ 623
M 23/622
Cubic capacity : . . .._......_...............
1985 cc 2175 cc 2350 cc 2350 cc
Transversely mounted, inclined
300 towards the front
Number of cylinders : _........................... 4 (iI/ linr, J 4 Iin linr,)
4 (irr /iUP J 4 f in lin i’ ,
Bore : 86 mm 90 mm 93.5 mm 93.5 mm
- Stroke : .,.,,_,.,.,....____.,.. .._._.....................
85.5 mm 85.5 mm 85.5 mm
85.5 mm
Compression ratio :
9/I 9/l 8.7511 8.7511
Maximum power ( DIN ) : . . . .._................... 102 bhp at 5500 rpm 112 bhp at 5500 rpm 115 bhp ot 5500 rpm
128 bhp at 4800 rpm
Maximum torque (DIN)
: . . 15.5 m.kg (112 ft.Ib ) 17 m.kq (123 ft.Ib) 18.2 m.kg ( 132 ft.Ib)
20.1 mkq (145 ft.Ib)
at 3000 rpm at 3500 rpm at 3000 rpm
at 3600 rpm
Maximum engine rpm in 4th gear :
* 13/62 final drive rtrtio :
5600 rpm 5800 rpm 5900 rpm
*14/61 final drive ratio ( -1 1’175 J 4600 rpm
Maximum engine rpm in 5th gear
(
13,‘62 final drive ratio ) : ,._............,..,........,....,.,........,..,.,..... .._.........,................ .._..._...................
5600 rpm
* NOTE : For CX 2200 and CX 2400 vehicles fitted with a torque converter, the maximum rpm in 3rd gear is 5600 rpm.
: Lubrification :
i
Under pressure, supplied by o gear-type oil-pump driven by the camshaft.
2
External oil filter cartridge ( PURFLUX, LS 105 type ).
d
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;
i Fuel supply :
a
i a) Engines fitted u~ifh a rnrbuwffor
WEBER compound-type twin choke carburettor (s.ee Operations MA. 142-00, 142-00 a, 142-00 b far the type, and the identification marks )
Dry-type air filter, with filter cartridge.
Mechanical fuel pump, driven by on eccentric on the camshaft.
b) i?ugi,jes ji/f.rd II ith /LIP/ iniPr/ioo :
BOSCH L-Jetronic electronic fuel injection system
Grade of pet,ol to be used : > ._,,,,.,_.._,,,,,.,......... . .._...o....._............................................. K.
99 Orrani ralrrig (FRANCE : Super grade ) (U.K. : 4-star )
Ignition :
Distributor ( DUCELLIER or MARELLI ) driven by the camshaft.
NOTE : The M 23/622 engine with fuel injection is fitted with (I DUCELLIER distributor with a magnetic sensor, and an u AC-DELCO /a electronic module.
- Spark pluqs : .................................................................................................................................... shorf warh
Firing o&r : .................................................................................................................................... 1 - 3 - 4 - 2 f tbu cylinders ale INR&Cd 011 the roc6w COI rr,
Timing :
Side mounted camshaft located in crankcase.

Downloaded from www.Manualslib.com manuals search engine 2 OPERATION No MA. 142.000 : ~<,n<, rorhurn/io,i.
This kit also contains o set of plugs SOLEX carburettors :
a b
Q Protective plug for sunken mixture adjustment screw
b Protective cap for mixture adjustment screw with collar
C - ProtectiGe cap for throttle spindle stop screw
The Replacement Parts Department supplies cops in packets of 10, under the following refrence nos :
Protective cop for sunken mixture adjustment screw :
SOLEX carburettor 5 489 718 Y (white)
WEBER
carburettor 5 489 716 B ( block)
- Protective cap for mixture odiustment screw with collor :
SOLEX carburettor . 5 501 075 U (white )
- Protective cop for throttle spindle stop screw :
SOLEX carburettor 5 507 643 K (white )
IJTILIZATION
I. REMOVING AND FITTING A PROTECTIVE PLUG FOR SUNKEN MIXTURE ADJUSTMENT SCREW ON A
WEBER OR SOLEX CARBURETTOR (
plug ( a ) ).
NOTES :
1 On GS vehicles fitted with a WEBER carburettor, it is necessary to ~emcwe the air-filter to carry out this
operation.
2 On GS vehicles fitted with a twin-choke SOLEX carburettor, it is advisable to remove the throttle closing
dashpot.
3 - On all 2 CV vehicles, Mehari and 250/400 vans, it is necessary to ~emcwe the air filter to facilitate the
use of the tool.
4 - On CX vehicles fitted with a WEBER carburettor, lower the supporting clamp for the hose to allow the tool
to be aligned
REMOVAL.
1. Load gun A on tool 8.

Downloaded from www.Manualslib.com manuals search engine OPERATION ND MA. 142.000 : ( ,<,,,<~d ,rr,t,,rvc 0, ,,I<> rnrh,!ra/io?r.
Op. MA. 142.000
3
I I
”
. /.
I’,
A
D
A
2. Pierce plug ( Cl ) :
SO,.EX rarl,,,rrrtor :
Position tool C and hold it against gun A.
Position the gun and tool assembly against
plug ( a ) making sue that the nozzle of gun
A
is pro$erly centred against the plug, and that
the assembly is aligned (IS precisely as possible
in the axis of the plug.
-Actuate the gun, and remove it, leoving?oool C
on the carburettor.
Position and hold tool
D against gun A.
Position the gun and tool assembly against
plug ( CI ) moking sure that the nozzle of the
gun is properly centred against the plug, ond
that the assembly is aligned as precisely as
possible in the axis of the plug.
Actuate the gun, and screw the tool into the
plug (L.H. thread ).
- Remove the gun leaving tool
D on the carburettor.
3.
Remove plug ( Q ) :
Load gun A.
- screw tool C in,<, I/><, lmrk of gun A.
- Actuate the gun to remove the plug.
Screw tool
D i,,fr, th<, bnrk of gun A.
Actuate the gun to remove the plug.
4.
Adiust the level of pollution :
NOTE : If the air filter has been removed, f CS
nvd 2 (.v rchirlcs 1 refit it withoot s<,crrring il
so as to carry out the adjustment.

Downloaded from www.Manualslib.com manuals search engine 4 OPERATION No MA. 142.000 : ( ,C,,<.IN/ ,<,“/,,,l’ 0, I/T<’ < o,h,,rntio,,
1
FITTING.
5. Fit the tamper-proof protective plug ( a ) :
Loud gun A.
Screw tool E onto qun A.
Position plug ( a ) in its housing on the
carburettor. ",i n MEHIJK rnr-hrc//or make
SNI“ it is /ill<~ii /he rig/,/ t1 n, I-O!,iili ( S?C
dingrrr,* lx/<,,, I.
Actuate the gun until the plug is properly
located.
NOTE : If the air filter has been removed, refit
it and \(- i/ ~~rwm~r,/I\-.
a
II, REMOVING AND FITTING THE PROTECTIVE CAP FOR THE MIXTURE CONTROL SCREW WITH COLLAR
ON A SOLEX CARBURETTOR ( cap (
b) )
b
REMOVAL.
1. Break the head of cap (
b ) using tool F
If this value is not obtained, unscrew the mixture
control screw.

Downloaded from www.Manualslib.com manuals search engine OPERATION No MA. 142-000 : Gcnrrd 1.cnturcs 01. the cnrfxrr~tion. Op. MA. 142-000 7
In order to conform to current regulations, checking and adjustment the exhaust emission on u Petrol )) vehicles must
without fail be carried out after the following operations :
I. REPLACEMENT OF ENGINE.
II. REPLACEMENT OF CARBURETTOR.
Ill. WORKING ON THE CARBURATION
- Replacing the components of the carburettor
- Adjusting the carburettor
- Worki? - rri the carburettor controls
IV. WORKING ON THE INLET SYSTEM
Replacing or removing the following :
the inlet manifold,
- the air-filter,
- the crankcase gases recycling system.
V. WORKING ON THE ENGINE
Adjusting the rocker arms
Replacing or removing the following :
the cylinder head,
- the camshaft,
- the rockers,
- the valves,
_ the barrels and pistons.
VI. WORKING ON THE IGNITION
- Replacing or reconditioning the distributor ( partly or cpmpletely )
~ Adjusting or replacing the spark plugs
- Adjusting the ignition timing
VII. WORKING ON THE EXHAUST SYSTEM
Replacing or removing the following :
- the exhaust manifold,
- the exhaust pipe, or any other section of the exhaust system.
VIII. WORKING ON THE ANTI-POLLUTION SYSTEM
When the vehicle is fitted with special equipment C I c,hic-1~s /or SWIIllI:‘S. Al'S7'KAl.l~ll m;d JAI'A.\. /ot

Downloaded from www.Manualslib.com manuals search engine OPERATION No MA. 142-O : Adj,,s/iaji f/a<, rarhnrt,//or Op. MA. 142.0
1
ADJUSTING THE IDLING SPEED
To carry out this adjustment, the following is needed
A tachometer
A device lor checkinq idling speed adjustments on the carburettor ( or on approved gas analyser )
- A CDA 23 checking oppmotus or a workshop test bench ( equipment mentioned in the Equipment and Repair
Materials list, or in the Tools and Equipment notes green notes )
NOTE : WEBER Carburettors ref. No W 54-50, 55-50, 69-50, 74-50 fitted on 1977 models onwards ore fitted with a
fool-proof plug ( white ) on the mixture screw. To adjust the exhaust emission, this plug has to be
removed, and
replaced, after adjustment, with a a Repair PI plug ( black ). See Op. MA, 142-000 for removing and fitting the plug,
and the necessary tools.
ADJUSTMENT CONDITIONS
1.
The idling speed adjus!ment must be carried out on an engine on which the rocker clearances and the ignition
are correctly set. with a clean air filter and
with the engine in good order.
2. Check that the butterflies return fully to their stops.
3. 30 not let pnythinq except the ignition and the engine cooling fan ( or ions ) impose any load on the alternator.
4. Run the engine to bring the
oil temperature up to 70 to 80’ C ( wait for the electric cooling fan ( or fans 1 to cut
in 1.
I. M 20/616, M 22/617, M 23/623 ENGINES I i< ?I< (5 wi/hr ,111 /or<,,,< co,1, <,r,cr or air ro,,di/io,ii?,g I ,I ‘-/
1. Wait for the electric cooling fan ( or fans ) to cut in.
2. Adjust screw (3) controlling the first choke butterfly opening until the following result is obtained : an idling
speed of 850 to 900 rpm.
3. Slowly adjust mixture screw ( 2) to obtain the following result
1.5 to 2.5 “/ of CO
1 7h~se authoris<, 8.7
% or more of CO2 nmbiot~l I~mpcuatur~ 0i 1 Y to 30” C.
4. Adjust screws (3 ) and (2 ) so that both the idling speed and the quantity of CO and CO 2 me correct.
Make sure that mixture screw (2) is adjusted last

Downloaded from www.Manualslib.com manuals search engine 2
OPERATION No MA.IE. 144-00 : Chtiractcristics o/ the e 1,-Jc,tror,ic H clcctroltic
fire1 injc ctiwt systettt.
((L-JETRONIC,,
The H L-Jetronic 1) system is’an intermittent low-pressure injection system which injects petrol into the inlet
manifold.
The system measures the quantity of air drawn in by the engine. which is the main parameter for calculating
the amount of fuel. to be injected. The metering of the fuel is carried out by electro-magnetically triggered
injectors. These are under constant fuel pressure. The quantity of fuel injected is proportional to the duration
of injection. which in turn is optimally determined for any given engin& operating condition by an electronic
control unit ( E.C.U. ) from information supplied by several electric sensors.
One of the principal contributions of the H L-Jetronic H system is the reduction in the level of pollution of the
exhaust emissions.
The (( L-Jetronic v system is made up of the following components :
1
: Electric fuel pump
2 : Fuel filter
3 : Thermal switch
4 :, Double relay
5 : Electronic control unit ( E.C.U. )
6 : Supplementary air control
7 : Pressure regulator
8 : Injectors
9 : Cold-start injector
10. Idling speed adjustment screw
11 : Air-flow sensor ( with incorporated air temperature sensor )
12 : Switch on throttle butterfly spindle
13 : Additional resistors for the injectors (8)

Downloaded from www.Manualslib.com manuals search engine OPERATION No MA.IE. 144-00 : Chu~acte~istics of the (( L-Jetronic n electronic
fuel injectiari system Op. MA.IE. 144-00 5
-AIR INLET SYSTEM’
Air drawn in via air filter ( 1 ) passes through the air-flow sensor (2’), via butterfly ( 3) and arrives in the inlet
distribution chamber, each pipe of which (4) leads to a cylinder.
-
‘I
Each cylinder has an electro-magnetic injector which is located very close to the inlet valve in order to improve
engine performance.
The supplementary air control (6) is located in parallel with the butterfly, and supplies the supplementary air
required by the engine to run smoothly when cold.
_ Once the engine has reached its normal running temperature, the idling speed air-flow is provided by a by-pass
valve
$ ( 5) which by-passes the butterfly as well.
.
2
co
T
$ It is important that the system be air-tight downstream from the air-flow sensor, so that no (( secondary )) air can
I
2 be drawn in, which would falsify the air-volume reading.

Downloaded from www.Manualslib.com manuals search engine OPEdATlON N- MA.IE. 144-00 : C1 3aractcJristics o/ the e L-Jetro~ic n elcctrorlir Op. MA.IE. 144-00 9
fuel injectian systwn. E.C.U; ( ELECTRONIC CONTROL UNIT )
Apart from three integrated circuits ( I.C. ) forming the main part of the E.C.U., there are in addition only a few
semi-conducting components condensers, calibrating resistors and filters so as to avoid.any interference.
I
The function of the E.C.U. is ,to supply an impulse to the injectors, and to control their opening for a precisely
defined amount of time. The E.C.U. to this effect uses the information provided by all the engine sensors which
translate the operating conditions of the engine into electric impulses.
All the injectors are connected in parallel, and inject fuel simultaneously twice for each rotation of the camshaft
( therefore,twice for each engine cycle ), injecting half the quantity of fuel required each time With this system
it is not necessary for the camshaft angle to coincide with the beginning of injection point, which eliminates the
need for a generating switch incorporated in the distributor.
The injection impulse control is ensured by the distributor impulses. The distributor produces four impulses for
every operational cycle. Since injection only occurs twice in every cycle, the E.C.U. must divide the frequency
by 2.
The impulses coming from the distriLti, are transformated into square waves by the waveform shaper. Since
injection only occurs twice for each camshaft rotation, whereas the distributor provides 4 impulses in the same
amount of time, the frequency of the impulses must be divided by 2 in the frequency divider.
These signals are used to charge a condenser. The condenser discharge determines the beginning of injection
point; the position of the air-flow sensor flap ( which determines the quantity of air drawn in ) being the main
parameter for calculating the duration of injection.
At the multiplying stage of the E.C.U., various correction values ( full load and idling speed via throttle butterfly
spindle switch, engine temperature via the water temperature sensor, air temperature via the air-temperature sensor
located in the air-flow sensor ) are combined with the signals from the air-flow sensor and the injt,ztion frequency
in order to determine the injection duration which is transmitted to the injectors by way of impulses.
The time it takes for the injector needle to open and close depends on the battery voltage.
As the supply voltage increases, the injection duration increases.
The fact that the quantity of fuel injected depends
on the voltage is cancelled out by the fact that the injection duration is inversely proportional to the voltaqq,in the
E.C.U.
The final impulse determines the time during which the injectors are connected to earth ( injection duration ‘supplied
by the output stage ).