CITROEN CX 1988 Service Manual

1682-T
2437-T Support for the dial-gauge used to check the TDC
Dial-lndlcator CHECKING THE
VALVE TiMlNG

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

I

l--
CHECKING THE
VALVE TIMING

- 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

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