fuel type Citroen CX 1985 1.G Workshop Manual

Downloaded from www.Manualslib.com manuals search engine OPERATIONS
The sequence of operations has been devised in order to obtain the best standard of work in the
shortest possible time.
The numbering of the operations is made up as follows
a) The code letter for the car (/ MA 3) for all CX vehicles except CX vehicles with ,c Fuel Injection )I.
b ) A number made up of three figures denoting the unit or its component.
c ) A figure code designating the type of repair
- the figures 0 0 0 indicate the characteristics of the car
the figures 0 0 indicate the characteristics of the unit
- the figure 0 indicates checks and adjustments
the figures 1 4. 7 indicate removal or fitting
- the figures 2. 5. 8 indicate dismantling or reassembly and
the figures 3 6 9 indicate reconditioning
The thumb-indexing which corresponds to the list of operations enables the particular operation
to be found without difficulty. TOOLING
Special tooling is denoted in the text by a number followed by the letter ‘I
The part-numbers inferior to the 6000 series concern tools aiready in use and common to vehicles
previously introduced and to CX vehicles.
The 6000 series refers to tools specially designed for CX vehicles
Additional tools of local manufacture are indicated in the text by a number preceded by the index
MR manufacturing drawings for these tools appear at the end of the particular volume filed in
numerical order. TIGHTENING TORQUES :
Torques are expressed in the following units
either in metres Newton ( m.N ) the legal unit for measuring torque. with the corresponding
amount in metre-kilogrammes ( m.kg )
or in decanewtonmetres ( da Nm ) 9.8i Nm 1 m.kg ci.981 daNm
The numbers corresponding to the torques are (t rounded off 1)
Examples 2 m.N 0.2
m..kg 60 m.N 6
m.kg
IMPORTANT When a tightening torque figure is followed by the words 11 torque wrench 11 the
operution must without fail be carried out with a torque wrench.
IMPORTANT WlTHOUT FAIL after each operation or group of operations there is a chapter
headed (, TIGHTENING TORQUES ,,; the screws nuts or studs which are underlined
indicate
that they are of a special grade ,c SECURITY HARDWARE 1). When refitting it is ESSENTIAL
to use this type of HARDWARE TO THE EXCLUSION OF ANY OTHER. ADVISORY SERVICE
For a!1 technical information concerning these vehicles please contact
The Service Department,
Citroen Cars Ltd..,
Mill St.,
Slough Berks. GE. Tel. Slough 23808
or DEPARTEMENT TECHNIQUE APRES-VENTE
ASSISTANCE TECHNIQUE -
92000 NANTERRE - FRANCE - Tel. 204 40 00 :
.- ---

Downloaded from www.Manualslib.com manuals search engine OPERATION No MA. 000 : General characteristics
CX 2400
GTI SALOON Op. MA. 000
( Vehicles fitted with the M 23/622 - 2350 cc fuel injection engine )
13
I
I. GENERAL CHARACTERISTICS
- Commercial symbol .................................................................................................................. CX 2400 GTI - Official symbol ..........................................................................................................................
MA
series ME
- Factory symbol (
Wdrranty symbol J ......................................................................................... ME
_ Introduction date ....................................................................................................................... May i977
- French fiscal rating ................................................................................................................
13 hp
- Number of seats .....................................................................................................................
5
Wheels and tyres :
- Wheelrims ..,.__......_..._............................._.........._.._.,_____......................
MICHELIN 5 l/2 J x 14 FHA 5.49 D
Tyres :
- Tyres ( tubeless
- Pressure in bars Front
Rear
1 . 185 HR 14 XVS
( psi ) . . . . . . . . . . . .
2.1 ( 30.5 )
*
Authorised Alternative :
Spare
,
- Tyres ( special, equipment ) . . . . . . . . . . . . . . . . 185 R 14 X(M+S) 185 R 14 X (M+S ) 185 HR14 X (M+S)
- Pressure in bars ( psi ) . . . . ..__................. 2.1 ( 30.5 ) 2.2
( 32
1 2.4
( 35 1
,
NOTE : - Vehicles are fitted with TUBELESS tyres as standard equipment. They can be fitted with tyres with
inner tubes of the same type, the pressures remaining the same.
- Tyre pressures are indicated on a label located on the panel at the front of the door (on the driver’s
s id,e ) .
II. GENERAL DIMENSIONS :
- Front track ............................................................................................................. . ..
- Rear track ..............................................................................................................
- Wheelbase ..............................................................................................................
- Overall length
.............................................. . ...............................................................
- Front overhang ........................................................................................................
- Rear overhang ... . ............................................................. . .......................................
- Overall width ......................................................................................................
-Height of vehicle I in normal dtiuing position ) ......................................................
- Ground clearance ( in normal dtiuing position ) ....................................................... 1.474 m
( 4 ft. 10 ins )
1.360m(4ft.S 1/2ins)
2.845 m ( 9 ft. 4
ins )
4.670 m ( 15ft. 3 3/4 ins)
1.057 m ( 3 ft. 5 l/2 ins )
0.764 m ( 2 ft. 6 ins )
1.734 m ( 5 ft. 8 l/4 ins )
1.366 in ( 4.ff. 5 .1/2 ins )
Q.155m ( O.ft. 6.1 ins ) .
. 8 1

Downloaded from www.Manualslib.com manuals search engine I. CHARACTERISTICS
:
0
u
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
z
;
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 ADJUSTMENTS
DESCRIPTION
1st choke
2nd choke MAIN ADJUSTMENT
Venturi bores
...................................................................................
d 23
27
Main jets ................. ...........................
... ................. ... ....... ...............
cl5 115 130
Air correction jets ..............................................................
d 225 190
Emulsion tubes
...............................................................
......
N’ F 21
F 25 IDLING SPEED CONTROLS
Petrol jets
.......................................................................................
d
50 50
Air jets .....................................................................................
(3
100 70
Anti-spill hole ............... ..............................................
....... ........
d 100
Leakage rate past the butterfly under a pressure of 450 mm of mercury
kg; h 2
$2 PROGRESSIVENESS
Staggered holes 3
2 ...............................................................................
u By-pass )) jets (
/irst stnrtiug /row the ho ttott/ J
100 ............................ 1 / 100 cb 80
( SC~COII~ slnrlirrg I.0Nf the bottom )
...................... l/ 1OOd 110 100
( third stnrfiug [row the bottov~ )
........................... l/100($
100 ACCELERATION PUMP
Pump control cam N”
14 850 094 14 850 094 ...............................................................................
Injector ( upper non-weighted type ) ............................................
d 45
Volume of pump - total
cm3 120 -t 0.2
.......................................................................
- partial ( /or r(‘/vre)~Co /~IIr/wS(‘S ) ................... ...........
cm3 0.5 0.7
Outlet tube
200 ................................................. ....... ...........
............... ... d COLD START DEVICE
Return spring for the anti-flooding membrane; 550 g” or 850 g*‘i;
Pressure calibrator for membrane control ...........................................
(1, 40
Return
spring for the clutch flap
180 g ...............................................
Ni 47 600 140
Positive opening’of butterfly under operation of coldstart device
.... d 1.25 2 0.05
Cam for cold-start device
N” 45 200 051
..............................................................
Opening of strangler flap (mensllrcd dt the loIc,cr c,dgc’ ur/dcJT 0 /lI’(‘.sSlI)‘C * 3.5 i 0.25
() j 4(j(J tr ,),, (J ,,, (Jr(-[,q Pin (b
““4 -t 0.25
..... ... .....................................................
... ...... IDLING SPEED CUT-OUT
Electrically operated NG 43840013 ............................................................................. GENERAL FUEL SUPPLY
Float needle
d 1.35
..................................................................................
Two plastic floats 13 F 0.5 ...................................
............... .............................
g.
7 t 0.25
Pre-adjustment setting with float and gasket ...............................
....... mm
Calibration of fuel return to tank .................................
......................... mm 0.8 to 0.9
1
*
W 74-00 only
* + W 69-50 and W 74-50 .

Downloaded from www.Manualslib.com manuals search engine ELECTRIC PETROL PUMP
The petrol pump is of the multi roller-vane type, driven by an electric motor which is energized as long as the
ignition is switched on. The rotor, which is fitted eccentrically in the pump housing, has metal roller vanes in
grooves around t.he periphery which, when they are forced outwards under the action of the centrifugal force, ensure
the system-is sealed.
Fuel is drawn into the cavities which,appear in between the roller-vanes, and is then forced into the injection
piping.
The electric motor is submerged’ in fuel. However, there .is no fire risk, since there is never any combustible
mixture in the pump housing. The pump supplies more fuel than the engine consumes under full load, so that
there is always sufficient pressure in the fuel system, whatever the engine speed. Excess fuel flows back to
the tank.
Once the ignition is on, the pump operates at the same time as the starter motor. Once the engine is running, the
airflow sensor energizes the pump.
Thanks to this type of.system, if an injector is faulty ( leaks ) the cylinder in question cannot be flooded if one
has ommitted to switch the ignition off. PETROL FILTER (1) :
A fuel filter, fitted between the pump and the injectors, prevents any impurities from reaching the injectors. PETROL PRESSURE REGULATOR ( 2 ) :
The fuel pressure is maintained constant by the pressure regulator. It comprises a metal housing
is a diaphragm., One side of the dipphragm.is subjected to the fuel under pressure, and the other 2
to the action of a calibrated spring. inside which
side is subjected
When the fuel pressure is in excess of 2 bars ( 29 psi ), the diaphragm lifts and allows fuel to flow back to the
tank.
The pressure provided by the regulator is pre-adjusted at the factory. The chamber on the side of the spring is
connected via a flexible pipe to the inlet manifold. Therefore, the difference between the pressure in the inlet
manifold and that of the fuel is maintained constant.
For any engine load, the drop in pressure at the injectors is therefore the same.