1988 CITROEN CX engine

Raise ihe vei-~cle front end
Shift in the i-\~yi-\est gear. Move the crankshaft using
t!le R.H. road wheel.
Remove, Fig. I:
- inlet pipes (I 1,
- tilt: cyllnderlleati CoveI,
- the sparkIng plugs
o. 4 piston to TDC
(with the valves in the “rocking” position).
Place tool 1682-T fitted with a dial indicator In
cylinder No. 1, Fig. II.
Firlti ihe TDC.
Adjust cylinder No. 1 lrllel valve (2) clearance to
1.10 mm, Fig. II.
Rotate the cl-ankshaft through a complete turn In the
normal direction of engine rotation.
Record the clearance of cylirlder No. 1 inlet valve:
the figure should be comprised between :
0.05 and 0.25 mm eck and adlust ihe valve locker clearances.
Inlet = 0.15 mm
Exhaust = 0.20 mm
Refit:
- the cylinderhead cover,
the inlet pipes,
- the spark plugs (tightening torque: 2.5 mdaN),
Lower the vehicle to the ground

- the road wheel,
- the wheelarch lining,
the belt protection covers,
- the engine oil filler plug.
Position:
- the valves of cylinder No. 1 in the “rocking” postion
(look Into the oil filler neck),
- the flywlleel, with marks + + aligned, Fig. I. t/hat mark 1s opposite screw 121,
- ttlat the:ie ar-e 35 pitches between marks and
passing al-ounc tensioner roller- (I 1.
Refit:
- the filler plug,
- the timing belt covers,
- the wheelarch lining,
- the wheel
Reconnect the battery negative cable

Toothed sector for locking the engine flywheel REMOVING/REFITTING THE TIMING
BUT, ON THE VEHICLE
---____ .-

loosen, Fig II,
- valve rocket adjustrnr:nt screws (4) so as to reduce
the stresses irl the camshaft.
Fit: Fig. 111,
- tool 6012-T, once the engine flywheel protective
plate has been rernoved
Remove, Fig. IV:
- the HH wheelarch rubber sealing strtp,
- the al&l-nator belt and housing,
- crankshaft pulley (5),
- timing belt casing 161,
- tool
6012-T, Fig. III
Slacken, Fig. IV,
- the two XI-ews (7) and 18) securing the autornatlc
tensioner by a half turn,
Compress the tensioner spring and retighterl screws
(71 and 18).
Remove:
the timing belt. Crarlkshaft rotation, two pnss~ble rrrothotls
a) i-rlgage the irighest gear and tul n the clank-
shaft by means oi the road wheel OI the wheel i-tub
b) Rotate ti-le crankstlaft 1i1 the normal direction
of eqne rotation using the crankshaft pulley fixing
screw fitted with a ciistsnce piece
Position:
- the pistons at mid-point of their stroke
ith the crankshaft key placed horizontally).
djust the valve clearance
Inlet = 0.10 mm
Exhaust = 0.25 mm

- crankshaft key horrrontally (with mark “c” stagge-
rred by 5’ upwards),
- mark “a” or “d” on camshaft,
- mark “b” on the rntermedrate shaft.
- Each timing mark on the belt must line up with the
tooth wheel marks.
Fit the belt (avoid contact with oil or grease).
Release, Fig. I and 111,
- tensioner roller screws (I 1 and 12) (let the spring act)
then tighten the screws.
Turn:
- the crankshaft 180’ clockwise.
Do not turn backwards
Release:
- the tensioner roller fixing screws then retrghten
starting with the upper screw (I ), Fig. I and Ill.
Turn:
- the crankshaft a further two turns clockwise.
Slacken, Fig. I and Ill:
- tensioner roller screws (1) and (21, (let the spring
react),
- then retighten starting with screw (I 1.
Fit:
- tool 6012-T., Fig. II. Install, Fig. lb:
the trming belt casing,
crankshaft pulley 13),
trghten screw (4)
to 8 mdaN on engine --r-829.A5
to 12.5 mdaN on engrne -+J6T.A5QQ
- the alternator belt and cover,
- the wheelarch rubber sealing strip.
Remove, Fig. II,
- tool 6012-T.
Fit:
- the cylinder head cover and gasket
ttightenrng torque: 0.6 mdaN).
Recouple:
- the accelerator control rod,
- the flexible hose,
- the cold start flap control cable.
Refit:
- the wheel,
Lower the vehicle to the ground.
NOTE:
- Camshaft toothed pulleys of engines 829.A5 and
J6T.A500 are identical but the fitment is different,
Fig. I.
- If, after carrying out the belt tensioning operation,
the timing belt is noisy when the engine is hot,
retension the belt with the engine hot.

emove:
the I-oati Wi-l~~d,
- the wheelarch lrnrrng,
- the belt protectron covets
Position: Fig. I and II
the valves of cylrnder No. 1 rn the “rocking” ~OSI-
tion (look Into the engine 011 filler),
the flywheel wrth mar-ks- -alrgned,
- camsfraft gear wheel mark A opposite screw 12)
Loosen:
the nuts of the tensioners and compress the spring
of eacir tensloner. Hetighten the nuts.
Remove:
- injection pump belt,
- the trmrng belt
REFITTING
Fit, Fig. II:
the timrng belt- marks t-+-) and i-e-1 on the belt
should face the marks A and B on pinrons (there
are 35 pitches between A and B, passing around
the tensloner roller (I 1).
Loosen the nuts of the tensioner roller.
Install, Fig. III:
- tool 6Q28-T.K. on the roller
- the tool weight over the mark 2 of the rod, Fig 1V. Fitting the injection pump belt:
Run the engrne by 1 turn err the drrectrorr of rotation
until marks--- +- /Ino up, Fig. I
(wrth cylinder No 1 at the rnrtral trmrng
point)
Setting the pump to the injection point:
refer to Op @ MA. 146-011
Fit the InJectron purnf, drrvrng belt with the srde oppo-
site the roller, trght.
Slacken the roller nut. Let the roller- spring react
Tighten the rnut to 2 mdaN.
Rotate the engine by 2 turns in the direction of nor-
rnal rotation and check the pump timrng.
Remove the tools
Start the engine Warrn it up until the electric cooling
fans operate.
Retension the belt while the engine is hot, Fig. IV
Refit:
- the protectron covers,
- the wheelarch lining,
the road wheel

Engine Inlet Exhaust @
2 I. did 2 2 L Pet1
Fig. I
0 IO rnrr 0.25 rrirr
2.5 l- Petr.
Fig. II
0.15 mm 0.20 mm
Possible methods
1 “I
%“I
Valves
fully
open
64 1
@3
ciD4
69%
Adjust
3 694
4 692
2
@ 1
1 ‘83
Valves in
the r-ocklng
position Adjust If the valve rockers arc? sl~l! noIs\; after adystment,
proceec as follows
Screw out lhe three carmshaft bearing houslng
attachment screws iiocared beii/no’ rhe
carnshfl
pu//e)/i
Retighten
the beal-ing housing screws
Tension the belt.
Adjust the valve clearances.

CHECKING AND ADJUSTING
THE ENGINE SUPPORT BRACKETS
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