oil pressure Citroen CX 1974 1.G Workshop Manual

Downloaded from www.Manualslib.com manuals search engine Operation
number
VIA. 000
VIA. 00
VIA. 00-600
vlA. 00-655
VIA. 01
WA. 02
MA. 03
MA. 100-00
MA. 112-O
MA. 120-O
MA. 142-000
MA. 142-00
MA. 142-00 a
MA. 142-00 b
MA. 142-00 SI
MA. 142-O
MA. 142-O SD
MA. 144-00
MA. 144-O
MA. 173-O
MA. 210-00
MA. 210-00 a
MA. 210-O
MA. 210-O a
MA. 220-O
MA. 221-O
MA. 230-00
MA. 230-O
MA. 236-O
MA. 312-00
MA. 314-O
MA. 320-00
MA. 320-O LIST OF OPERATIONS
IN MANUAL 818-l
cc CX Petrol )) uehicles
DESCRIPTION GENERAL
General characteristics
Jacking and towing points
Exterior and interior dimensions
Fitting the rubbing rails
Protection of the electrical units
Working on the hydraulic system : fitting precautions
Recommended materials ENGINE - CA,RBURATlON - IGNITION - COOLING
+O 2
Characteristics and special features of the engine (M 20/616, M 22/ 617,
M 23/623 and M 23/622 )
Checking and adjusting the valve operation :
- Adjusting the rocker clearance
Checking the engine timing
General features of the carburation
Characteristics and special features of the carburettor (M 20/616 engine )
Characteristics and special features of the carburettor ( M 22/617 engine )
Characteristics and special features of the carburettor ( M 23/ 623 engine )
Characteristics and special features of the anti-pollution system
I SWEDISH Jlurket r,c~kicles )
Adjusting the carburettor - adjusting the idling speed
Checking and adjusting the anti-pollution system
(SIVI:‘DfSH Mdrkct rvhicles J
Characteristics and special features of the electronic fuel injection system
(L.~etKJnic )
Checking and adjusting the electronic fuel injection system (1..Jetrolzic)
Checking the petrol feed system
- Petrol pump, and petrol filter
Characteristics and special features of the ignition system
Characteristics and special features of the electronic ignition system
Checking and adjusting the ignition
Checkinq and adjusting the electronic ignition
Checking the oil pressure (on
the rvhicle )
Filling and adjusting the pneumatic oil gauge
Characteristics and special features of the cooling system
Working on the cooling system
Aligning the pulleys CLUTCH - TORQUE CONVERTER
*O 3
Characteristics and special features of the pedal-operated clutch
Checking and adjusting the pedal-operated clutch control
- Checking the clutch clearance
Characteristics and special features of the torque converter
- Characteristics
- Operating diagram of the torque converter
Checking and adjusting the gap of the contacts controlling the electro-valve
- Checking the pressure in the converter oil-feed system

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 2
OPERATION No MA. 02 : I!‘orki//g OI/ hyc/rt/t/lic s\,s/vN/.
5. PRECAUTIONS TO BE TAKEN BEFORE WORKING ON THE HYDRAULIC SYSTEM :
a) (.~rvJuI/)~ CIVOII the area of work, the unions and the unit to be removed
Disconnect the lead from the negative terminal of the battery
Only use petrol or lead-free petrol for cleaning.
b ) I~~J/VNSO
the /)twsure in the circuits
- Place the vehicle in the G /arc B
position. stop the engine.
- Slacken the Pressure Requlator release screw.
Wait until the front of the car has reached the low position 6, PRECAUTIONS TO BE TAKEN DURING REMOVAL :
a) t3lnuk o!! the w~~tnl pi/~es with plugs, and rubber tubes with round pins of the correct diameter
b)
t3lmk of/ //IV op,c,/li,lg.s of components with pluqs of the correct diameter
NOTE : Plugs and pins must be carefully cleaned before insertion. 7.. CHECK OR TEST OF HYDRAULIC UNITS :
- Use 3654-T t~sf hc~~c-h equipped and designed for use with LHM fluid
This bench is /)ciitltc’d ~IY’~‘~/ and its accessories are marked in green.
- Never use the bench with another fluid or for testing components operating with another fluid (units of a (( D ))
car using LHS2 for instance ).
NOTE The (< Le Bozec )) pump used on test benches for checking DIESEL injectors can be resorted to for
testing components operating with LHM mineral fluid provided that the bench is cleaned first. 8. PRECAUTIONS TO BE TAKEN DURING REFITTING :
E steel pipes must be blown through with compressed air,
5 rubber tubes and joints must be washed in petrol or white spirit and then dried with compressed air,
= hydraulic units must also be cleaned with petrol or white spirit and blown through with compressed air.
NOTE Renew all joints and seals during refittinq .
b
) 12rlbrijicntim :
- Follow the indications as stated in the operations in the Manual..
- Joints and internal parts must be liqhtly oiled hefore fitting ( use mineral fluid LHM only )
L If parts in contact with hydraulic units have to be qreased use a mineral grease only ( as employed for
Cardan shafts or bearings ).

Downloaded from www.Manualslib.com manuals search engine OPERATION No MA. 02 : I+ 4’ 0, “‘g 01, Ill<, l1\~c!).ollli(- s\‘sfell~. Op. MA. 02
I To connect a union proceed as follows :
- Position sleeve-seal (( a u lightly coated with
L,HM fluid; this sleeve seal must not reach the
extremity of pipe (( b )).
- Centre the pipe in the housinq by lininq it up
with the axis of the hole, avoidinq all stress.
( Ensure that the end u b )I of the pipe enters
into the smali bore C< c )> j.
Start screwing in the union nut by hand.
- Tiqhten nut moderately : excessive force could
cause a leak because of deformation of the pipe
NOTE Tiqhteninq torques :
3.5 -mm pipe t 5.8 to 6 6 ft lbs
4 5 mm pipe 5 8 to 0 mN ( 0.8 to.0 9 ‘1 kg )
6 6 to 8 0 ft.lbs
6. O-mm pipe
1
9 to 11 mN (0 9 to 1 1 m.kg ) c ) Fittilzg :
I Only use joints of a quality compatible with LHM mineral fluid.
The design of the various seals ensures that their sealing action increases with fluid pressure The oiltiqhtness e
is therefore not improved by greater tiqhtness of the unions
2 To connect a rubber tube a rubber rinq of suitabie diameter has to be positioned between thr, tube and the hose
:
E clip.
0
x
a
A 9, CHECKS ON COMPLETION OF WORK
On completion of work on hydraulic units or the system itself check the followinq :
h) ‘1’11~ C./CJ~~~IIC-C, I~c,lrt,c,c,rt I/J<
pipvs : pipes must not touch one another or any other component, nor may any other
unit, whether fixed or movable, exert any stress on them.

Downloaded from www.Manualslib.com manuals search engine Op. MA. 03 3
SEALING PASTES (continued)
USAGE
Sealing of porous
sections of casings
Sealing of the pipes
warning the inlet
manifold PRODUCT CHARACTERISTICS MANUFACTURERS
COMET
DEVCON F
Department D.A.V.A.
Aluminium based
METALIT DISEMPEX
METOLUX A Light metal based
METOLUX
SILASTIC 732 R.T.V. Remains supple after drying DOW CORNING S.A.R.L.
Refractory adhesive
paste Ref. 1500 Ets BARTHELEMY
(COLLAFEU ) . IV. PENETRATING OILS.
2 6 , USAGE PRODUCT CHARACTERISTICS MANUFACTURERS
7
a,
Rusty or corroded DEGRIPPANT Aerosol MOLYDAL
‘-
-6 components, or assemblies
: DEGRIPPANT MO Aerosol or 5 litre can SOFRALUS-BARDAHL
2- rusted in position V. GREASES AND LUBRICANTS.
USAGE PRODUCT CHARACTERISTICS MANUFACTURERS
RHONE-POULENC
Greasing of (< fluid-bloc )) S.I. 33 LAMBERT-RIVIERE
suspension bushes Silicone grease
GRAISSE 33
(MEDIUM ) DOW CORNING S.A.R.L.
GRAISSE 1495 Highly adhesive universal
MOLYDAL
grease
Greasing of drive-shafts MOLYKOTE
LONGTERM 2 Extreme pressure grease, good
DOW CORNING S.A.R.L.
adhesive, and is waterproof
TOTAL MULTIS MS Universal grease TOTAL C.F.R.
Lubricant for rubber and
plastic REDEX-SILICONE Aerosol REDEX - FRANCE
Aerosol lubricant; resists salt
Components operating
HI _ LUB - HTC
under difficult conditions and fresh water at high pressures COMET
and temperatures (Department D.A.V.A. )
Lubricant for spark-plug
threads NO-BIND Anti-locking lubricant ; resists
high temperatures CEFILAC
(Department Joint Curty )

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 OPERATION No MA. 100-00 : Characteristics and special features of the engine. Op. MA. 100.00 15
b) Timing chain :
- Clearance between the chain and the chain guide : . . . . . . . . . . . . . . . . . . . . . . . . . . 0.10 to 0.50 mm
c) Rockers :
- Length of push rods :
- Inlet : . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 189.10 ‘, Og’Q5 mm
- Exhaust : . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 213.35 + 0.3
- 0.75 mm
- Maximum out of true of pushrods : . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 mm
- Rocker clearance (engine cold) :
-Inlet : . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.15mm
- Exhaust : . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.20 mm
7. Flywheel :
2 - Distance between the clutch mechanism thrust face, and the 0 u clutch disc thrust face : . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.5 -is mm
7
co
G NOTE : It is essential to fit the diaphragm or flywheel mounting screws with LOCTITE FRENETANCH.
x
z - Correct fitting of starter ring : non machined face of the ring facing the flywheel shouldering.
s
2
E 8. Lubrication system :
5
z
6%
- Grade of oil . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . TOTAL ALTIGRADE GTS 20/W 50
2
- Capacity of sump :
- after dismantling : . . . . . . . .._................................................................. 5.800 litres ( IO.2 pts )
- after draining and changing the filter : : . . . . . . . . . . . . . . . l......................... 5.306 litres ( 9.3 pts )
- after draining : . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.650 litres ( 8.2 pts )
- Oil pressure :
(At a temperature of 100 +‘S’ C)
- at 2000 rpm : . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 .bar min. ( 43.5 psi )
- at 4000 rpm : . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 to 5 bar ( 58 to 72 l/2 psi )
- Calibration of pressure switch : . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 475 to 675 mbar ( 7 to 9.8 psi )
(warning lamp goes oat)
- Calibration of temperature switch (CX 2000 e Jan. 1975) : . . . . 1... 147’ to 150’ C
(warning lamp goes comes on)
(All CX vehicles Jan. 1975 -) : 135” to 138’ C
(warning lamp comes on )
- Calibration of relief valve spring :
- length of spring fully compressed : . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31 mm
- length of spring under load of 10.9 kg : . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42 mm
- Filter cartridge :
- calibration of (( by-pass )) valve : . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 550 mbar ( 8 psi )
NOTE : When changing the filter cartridge, check the cleanliness of the seal and’the contact area on the filter
housing.
- For removing and fitting the cartridge : . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Use Tool 6002-T

Downloaded from www.Manualslib.com manuals search engine 5. Air-flow sensor ( DIAGRAM 5 )
- Disconnect the E.C.U.
- Using an ohmmeter check the continuity of circuits (( 6 )a, H 7 )) (( 8 H and (( 9 )) linking the air-flow sensor to
the multiple terminal board. as well as the continuity between each of the terminals
- The air-flow meter does not require any maintenance. It is not necessary to oil the flop. It must work without
high spot or catching
When the air-flow sensor is removed blank off the ducts so OS to protect it from dust
- Check the air circuit for air-tightness.
6. Resistors and injectors :
- A dirty injector may cause o lock of power. or on unstable idling speed.
- It is possible to test the functioning of the injectors with the engine idling by disconnecting each injector
in turn the engine rpm should decrease each time.
- Disconnect the E C U
- The resistance of an injector is 2 to 3 II.
- Each supplementary resistance is 5 to 7 R
- The volume delivered by an injector ( kept constantly open and under the normal operating pressure ) is
approximately 200 cm3 /min ( 12 25 cu in/min )-
- If the rubber pipe on one of the injectors appears wet on the outside, the injector must be replaced.
- Using an ohmmeter, check the continuity of the circuits

Downloaded from www.Manualslib.com manuals search engine 28 OPERATION N” MA.IE. 144-O : Ch <,c ,ng n,,d nlfjusfiup Ihe u I.-~<~tro,,ir i) <~lrr/mr,ir k’
/,,,.I i,,jrr/io,, S~S,W1, ANNEXE : D - ADJUSTING THE IDLING SPEED AND THE EXHAUST EMISSION
CHECKING CONDITIONS
1.
Checking the idling speed must be carried out
on a clean engine on which the ignition and the
valve clearances are properly adjusted and
fitted with a clean air-filter.
2. Check that the throttle butterfly returns correctly
to its stop.
3. Do not load the alternator by switching an any
of the electrical components, except the iqnition
and the electric cooling fan (s) 4.
Run the engine to bring the oil temperature up
to 70 +o 80’ C ( wait for the electric cooling
fan is) to cut in ). IMPORTANT : Use exclusively (I high tension
tachometer ( do not damage the H.T. lead of
the ignition wiring harness ).
ADJUSTMENT
1. Check that the butterfly is not jammed in position
when it is resting against its stop.
2. Wait for the electric cooling fan (s) to cut in.
3. Use screw ( 1 ) to adjust the idling speed to 850
to 900 rpm.
4. Check the exhaust emission :
The resulting amount of CO - CO2 ( corrected CO
reading 1 must be beI& 4.5 %.
In case this reading cannot be obtained, check the
valve clearances, the ignition, the fuel pressure,
the air-tightness of the aircircuit, and the complete
fuel injection system.
5. On (I vehicle fitted with optional oirtonditioning
switch the compressor on, and adjust the idling
speed from 1000 to 1050
rpm, by adjusting the
screw on the auxiliary box located next to the
electro-vol”e.

Downloaded from www.Manualslib.com manuals search engine OPERATION No MA. 220-O : (.hrrkinfi Ih e oil pr~ssrrrc m the rehicle Op. MA. 220.0 1
CHECKING THE OIL PRESSURE ON THE VEHICLE
79-T 1. Remove spare
wheel.
2. Check oil level if necessary.
4. Preparing pressure checking apparatus
Connect pressure gauge 2279-T ( ,wdun/r~l
imn 0 /o IO hnrs 1 to union 6004-T.
Tiqhten union screw ( 3 )
6. Start engine With oil temperature at 100’ C pressure should
be :
a+ 2000 rpm 3 bars mini43.5 psi ) o+ 4000 rpm 4 to 5 bars (58 to 72.5psi)
7. Rrmave union 6004-T and pressure qouqe. Tightening torque : 30 to 35 m \ ( 3 to 3.5 m.kg)
( 21 l/2 to 25 l/2 ft.lb )
Connect supply lead
Replace spare wheel
NOTE This operation con also be carried out
with the aid of CI MULLER kit,reference 451.