1979 Citroen CX engine

Downloaded from www.Manualslib.com manuals search engine CRANKSHAFT
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NOTE The Replacement Parts Department only supplies one class of crankshaft : AA
- Tight.ening torque for the balance-weight fixing screws : 7.2 to 8 da Nm (52 to 57 34 ft.Ib)

Downloaded from www.Manualslib.com manuals search engine Op. MA. 100-00 7
CRANKSHAFT BEARINGS AND RINGS
Crankshaft end-float . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .....
b.045 to 0.16 mm
+NOTE : On engines fitted with a torque converter gearbox,
the half-rings for adjusting the crankshaft end-float
have an additional lead-tin surface treatment.

Downloaded from www.Manualslib.com manuals search engine CRANKSHAFT- CONNECTING RODS - PISTONS
The Replacement Parts Department only supplies connecting rods in sets of 4 (class 1 ) End-float of connecting rods on crankshaft : .._....,....._._.___...............: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.037
to 0.247 mm
- Variation in the weight of the connecting rods on the same engine : . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 g max.

Downloaded from www.Manualslib.com manuals search engine OPERATION N” MA. 100-00 : (:hnractc,ri.stics arid specinl j(,atrlres o,/ the> cl,gi?lcJ. Op. MA. 100-00 1
9
4. Barrels and pistons :
a)
Barrels :
cast iron wet-type removable barrels.
b) Pistons :
-- autothermic pistons, in lead-coated alpax,
- correct fitting : the arrow must point towards the engine flywheel
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C ) Piston rings : PISTON IDENTIFICATION MARKS
Correct fitting of piston rings :
The mark (( TOP 1) or the manufacturer’s
mark must face the crown of the piston.
1. Compression ring ( no mark )
2. Oil scraper ring ( marked )
3. Scraper-collector ring ( marked ) 3 or 4
NOTE : Since February 1976, the scraper
ring (2 ) on I a85 cc engines is conical,
and not (( tooth-shaped )).

Downloaded from www.Manualslib.com manuals search engine BARRELS AND PISTONS c 1()8j cc nr/cl ?/‘i cc I
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Replacement Parts Department only supplies barrel piston, gudgeon pin and piston ring assemblies in sets of 4.
- Thickness of barrel base gasket ( uncompressed ) : ............................................................................ 0.1 i 0.015 mm - profusion of barrel (with gasket uncompressed ) : .............................................................................. 0.04 to 0.135
mm
- Variation in weight ( gudgeon pins, piston and piston rings ) on the same engine : ........................
5 g max.

Downloaded from www.Manualslib.com manuals search engine Op. MA. 100-00
BARRELS AND PISTONS (2350 cc 1
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The. Replacement Parts Department only supplies barrel, piston, gudgeon pin and piston ring assemblies in
sets of 4.
. Thickness of barrel base gasket ( uncompressed ) : . . . . . . . . . . . . . .._.._....................................................... 0.1 2 JO.O1O mm
protrusion of barrel ( with gasket uncompressed ) : _..._,_,...,._,............................................................ 0.045 to 0.115 mm
- Variation in weight (pistons, gudgeon pins, and gudgeon pin circlips ) on the same engine : . . . 5 g max.

Downloaded from www.Manualslib.com manuals search engine 5. Cylinder head :
Aluminium alloy, with hemispherical combustion chambers.
- Original height : . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ........................ 90 mm
- Overall flatness to within : . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...... 0.10 mm
- Flatness between fixing holes to within : . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.025 mm
a) Head gasket :
Round clinching (diameter = 92.5 mm ), the identification mark (( CEFILAC 1) or (( COOPERS )) towards the
cylinder head ( 1985 cc ).
Oval clinching; the identification mark (( CEFILAC 1) towards the cylinder head (2175 cc ).
Round clinching (diameter = 96.5 mm ), the identification mark (( CEFILAC )) towards the cylinder head (2350 cc).
TIGHTFNING SEQUENCE
Tiqhtening torques f cold)
Initial tightening . . . . . . . . . . 3 da Nm
( 21 3/‘4 ft.Ib)
Final tightening . . . . . . . . . . . . . 6 to 6.5 da Nm
(43 l/2 to 47ft.Ib)
b) Valve seats :
The valve seats are fitted by temperature
shrinking.
VALVE SEAT WIDTH
INLET
I I I I I I T
17 13 9 5 1 4 8 12 16
EXHAUST

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c) Valve guides and valves :
5
7 q+- j
-- - -
Y
NOTE : Inlet. and exhaust valves are fitted with oil-seals.