oil Citroen CX 1974 1.G Owner's Manual

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 OPERATION No MA. 100-00 : Characteristics and special jeafruvs oj the cvlghv.
Op. MA. 100-00 17
9..Tightening torque :
a) Engine suspension :
4-.spc~~d manrlal gearbox :
7 Torque bar (( Nylstop )) fixing nuts : .............................................................. 8.2 da Nm ( 59 ft.Ib )
- Securing screws for the flexible bearer on the subframe ; ........................ 3 da Nm ( 22 ft.lb)
- Flexible bearer assembly screws :
..................................................... .
........ 10 da Nm (72 ft.lb)
S-sp~~tl n1m11ra1 gca~box. and forq~~c cour,c~rtrr gc~arkos
- Torque bar (( Nylstop )) fixing nuts : . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 da Nm (72 ft.lb)
- R:H. flexible mountinq assembly screws : . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 da Nm ( 72 ‘ft.lb )
- L.H. flexible bearer assembly screws : . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 to 17 da Nm ( 116 to 123 ft.lb )
b) Crankcase :
Screws and nuts securing the timing cover : . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.4 to 1.9 da Nm (10 to 14 ft.lb)
c) Timing :
- Screw on the camshaft thrust bearing : . . . . . . . . . . . .._............................................ 1 .4 to 1 .9 da Nm ( 10 to 14 ft.lb )
- Timing chain guide securing screw : . . . . . . . . . . . ..__................................ . . . . . . . . . . . . . . .
1.4 to 1.9 da Nm ( 10 to 14 ft.lb)
- Timing chain tensioner securing screw : . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.9 to 1 .I da Nm (6.5 to 8 ft.lb )
d) Lubrication system :
- Oil filter mounting ( LOCTITE FRENETANCH ) : ......................................
1 to 1 .5 da Nm ( 7 to 11 ft.lb )
- Oil temperature switch : .................................................................................. 3 to 3.5 da Nm ( 22 to 25 ft.lb )
- Union screw for cylinder head lubrication passage : ..................................
1 to 1 .2 da Nm ( 7 to 9 ft.lb )
- Oil filter cartridge ( SPV
wnrt/r]nctc/rer‘s rmte ) : ............................................ 1 .l to 1 .5 da Nm ( 8 to 11 ft.lb )
- Engine oil drain plug ( lo~!,c,r s/t~/p
co/‘cr) : .................................................. 3.5 to 4.5 da Nm (25 to 32.5 ft.lb)

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. 142.0 SD : (./ )I c ,,,s m,d nd;,,s/is~~ /A? Ni/li-/Joll,lli,,ill I \/i’V, b’
/ Sll l:l~/sl1 lI.\KKI:I v1:/1/c l.JT I,
CHECKING THE IDLING SPEED AND THE CO READING I (.. JXO J
On cr vehicle fitted with the following :
-distributor : DUCELLIER 4510 B
Dwell ratio 61 7: + 3 ‘Y
Dwell angle 550 + 2”
Static advance 6”
Strobe timinq
6” at 850 rpm
Centrifuqal cuwe IA 2
- carburettor : WEBER 34 DMTR 30/200 Identification mark W 63-00
spark plugs: AC 42 FS
- engine, with the following rocker clearances : Inlet = 0.15 mm, Exhaust = 0.20 mm
Checking and adjusting the CO is carried out in the following conditions
1. Disconnect from the air-supply valve ( 3) the pipe from the valve to the exhaust manifold
2. Bring the engine oil up to a temperature of 85 ? 5’ C
3. Wait for the cooling ion ( 01
ims J to cut in.
4. Adjust screw ( 3) for opening of first choke butterfly in order to obtain on idling speed of 850 to 900 rpm
5. Slowly adjust the mixture screw (2) so (IS to obtain a CO reading of 2 to 3 “L for a temperature of 15” to 30 C
6. Adjust the mixture screw (2 ) lost
7. Connect to the air-supply valve (3 ) the pipe from the valve to the exhaust manifold.

Downloaded from www.Manualslib.com manuals search engine Op. MA.IE. 144-O 1 I - PRECAUTIONS TO BE TAKEN WHEN WORKII;(G ON A VEHICLE FITTED WITH THE (t L-JETRONIC n
SYSTEM.
1.
Do not run the engine if the battery leads are improperly secured
2. Do not use a quick-start charging trolley for starting the engine
3. Never disconnect the battery with the engine running
4. When charging the battery, disconnect the leads
5. Before checking the injection system, check the ignition : (advance, advance curve, proper grade of plugs 1
6. Remove the E C U before putting the vehicle through a paint-stoving oven
7. Check the conditions of the various connections
8. Never disconnect the E,C U. while the ignition is on
9. When checking compression, disconnect the positive terminal of the coil (in order to stop the injection signal). 10.
When carrying out a check requiring an ohmmeter, use exclusively a battery-powered ohmmeter. II. FAULT-FINDING.
1. THE ENGINE DOES NOT START, OR IS DIFFICULT TO START . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 2
2. THE ENGINE STARTS, THEN STOPS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 3
3. UNSTABLE OR INCORRECT IDLING SPEED, EXCESSIVE FUEL CONSUMPTION ........................ P:5
-4. ENGINE MISFIRES AT .ALL SPEEDS ........................................................................................................
P. 7
5. LACK OF POWER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ................ P. 9

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 7. Water temperature sensor : ( DIAGRAM 7 )
- Disconnecting ‘the water temperature sensor should cause the engine to stall. when hot.
- Disconnect the E.C U
Using the ohmmeter, test the continuity of the circuit. and measure directly the resisitance using the sensor
cc - 10’ C )) R = 7 to 12 kR
cc + 20” C )t R = 2 to 3 kQ
cc t 80” C H R -. 250 to 400 Q
e
2
ii 8. Air temperature sensor : ( DIAGRAM 8 )
E
-E
?
U-J
- Disconnect the E.C.U. -
Using an ohmmeter, test the continuity of the circuit. and measure the resistance of the sensor between
terminals (( 6 )) and (( 27 ))
(c-10’ CH. R-8toIlkQ
N t 20” C 1) R = 2 to 3 kQ
tt + 50” C n R x 750 to 900 !J

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 2 OPERATION No MA. 210-00 :~~‘hornc:cris:ics mri special /~~nttrrc,.s o,/ /he ig/litiorl Spark plug gap .,...._.......,...,. ,..._. ,...... ., ,, ,,
Q.6 to 0.7 mm
1 iqhtenrng torque ( cylinder head cold ) .._..._._........._.......... .20 to 25 mN ( 2 to 2.5 m.kg)
f Smear the thread with e NO-BIND n ) - ( 14 l/2 to 18 ft.Ib ) IGNITION COIL
External resistor type
I Manufacturer
I DUCELLIER
I SEV MARCHAL
I MARELLI
Reference N” 2777 C E 44 910 312 BZR 206 A
Primary circuit resistance ( at 20” C ) 0.68 i 0.02 n 1.1 to 1.2 Q 0.8+ 10 .: ,R
Resistance of outer resistor (at 20” C ) 1.32 + 5 ‘; R 1.5 to 1.6 R 1.35 i 4 . . R
Secondary circuit resistance (at 20” C ) 7500 2 1000 n
6000 -!I 5 Cl 7500 + 10 !’ Q H.T. LEADS
Length in mm Resistance of leads ( at 20” C )
Manufacturer. .................. .......................................................... ..................................................... ELECTRIFIL
Reference ..................... ............. ........... ....... ....... ... ........................ ............ ......... Bougicord 400 RTF 33
All rY?biclas ( - I/’ 1975 1
Description of leads
Coil to distributor ............................ ...........
Distributor to No 1 cylinder ... . ..................
Distributor to No 2 cylinder .......................
Distributor to N” 3 cylinder ........................
Distributor to N” 4 cylinder ........................ 570 to 580 625 to 1025 !J
400 to 410 420 to 645 11
520 to 530 555 to 850 11
540 to 550 580 to 880 Q
710 to 720 770 to 1165 Q
I I I
Description of leads Length in mm
I Resistance of leads ( at 20” C )
Coil to distributor ......................................... 820 to83O- 10 1 75 -859 to 860
Distributor to No 1 cylinder ..................... 360 to 370
Distributor to N” 2 cylinder ........................ 520 to 530
Distributor to NC 3 cylinder ....................... 540 to 550
Distributor to N” 4 cylinder
...................... 710 to 720 920 to 1400 - 10 175 -93.3 to 1450
400 to 570 n
555 to 850 R
580 to 880 Q
770 to 1165 Q
I I 1

Downloaded from www.Manualslib.com manuals search engine OPERATION No MA. 210-W 0 : Ch araclcrislics ~3rd spcial /W~~NWS 0j thr d~~fmt~i~ Op. MA. 210-00 a 1
ipith syslwn.
I
M 23/622 ENGINE
TRANSISTORISED IGNITION WITH ELECTROMAGNETICALLY CREATED IMPULSES
$ OPERATING PRINCIPLE
?
:
I
,D The electronic ignition comprises a coil ( 1 1. (I transistorised module ( 2) which includes among other components.
-
.f a power transistor working as a contact breaker.
and a distributor (3 1 with a magnetic pick-up ( impulse generator )
and an H.T. rotor.
;
ii
:
F The primary current from the coil goes through a switching transistor situated in the module ( the earthing is carried
“7
out via the fixing bracket for the coil mrd module assembly ).
As an impulse is created by the sensor in the distributor. it switches off the transistor and thus cuts off the flow
of current in the coil primhry circuit. which causes a (< High Tension 1) current in the coil secondary circuit.
The module is located in the distributor..replocinq the contact breaker unit in a conventional ignition system. It
comprises a sensor (4) and a 4-point star ( 5 ).
The,sensor has a permanent moqnet inside a winding. This windinq is connected electrically to the module
I
/
The 4-point star is made of metal. and has one star per cylinder. It is fitted in place of the rotor mm cam in (I
conventional ignition system.