CITROËN ID 19 Repair Manual page 38

36 OPERATION No. ID 100-3 :
To overhaul the engine ID
19
11
16
17
23
24
25
26
27
29
31
32
33
34
35
36
37
PARTICULAR POINTS
Dismantling
When dismantling the crankshaft-connecting rod-piston assembly, ensure that the central main bearing cap is marked so that it can be refitted
correctly. If the crankshaft and bearings are to be
rewed,
make a reference mark on the central and rear bearing shells so that they
are not reversed on assembly.
Do not remove the small end bushes.
As the cylinder head is made of aluminium, the sparking plug wells and valve seatings cannot be replaced without special tools.
Valve guides can be replaced (see Op.ID 112-3).
If
a thread is damaged or stripped, it can be replaced by a "Heli-Coil" thread (see note MR-4279).
Assembly
Valve spring calibration:
Outer springs: L = 37 mm. under load of 24.200 i 1.350 kg and
L=28~5mm.underloadof52f2~800kg.
Inner springs: L = 25.5 mm. under load of 5.250 f 0.300 kg and
L= 16mm.underloadofII +0.6OOkg.
Do notjt the rubber sealing ring on the exhaust valves.
Check the oil pump on a test bench:
Pressure = 3.5 kg/cm2 (50 lbs/in2), oil SAE 20 st 6o"C, the pump outlet through a 2.8 mm. diameter jet at 1,000 r.p.m.
Replacing the starter gear ring: to jt, heat the bore of the starter gear ring to a temperature of 200 to 250°C. (straw colour), do not exceed this
temperature.
If
the clutch bearing face "a"
has been ground, remove the same amount from the bearing face "b" of the clutch casing (see Pl.42).
Checking crankshaft parts:
The tightening torsion of the bearing cap screws
is
58 ft.lbs (8m.kg), admissible clearance = O-06 mm. max. between crankshaft and bearings.
The tightening torsion of the connecting rod bearing cap screws is 36 ft.llbs (5 m.kg), admissible clearance = 0.06 mm. max. between the crank-
shaft and the connecting rod bearings.
Note the reference marks made when dismantling the bearings and caps.
Fitting the pistons: heat the pistons to a temperature of 60°C (oil bath or furnace) to jt the gudgeon pins;
note the order of assembly and do not
interchange the gudgeon pins, as they are weighed and selectively assembled with the pistons.
Tightening
torsion
of the connecting rod screws = 36 ft.llbs (5 m.kg). This torque is to be strictly adhered to.
Tightening torsion of the screws for the rear thrust plate of the camshaft = 7.5 ft.lbs (1 m.kg) (lockwashers).
Fitting cylinder barrels: no hetght adjustment, 1 paper gasket only fitted dry.
Cylinder head gasket: Smear it with boiled linseed oil, the crimping towards the barrels;
new type of gaskets ari fitted dry, the varnished surface
towards the cylinder head.
Fitting the cylinder head: 1st ttghtening torsion 21.75 ft.lbs (3 m.kg), 2nd tightening torsion 43.5 ft.lbs (6 m.kg). Observe the torque loading and the
tightening
sequence
of the screws indicated on PI. 7.
Check the cylinder bores: deformation
or
ovality = 0,03 mm. max., except for a distance of 20 mm. from the bottom of the bore: = 0.05 mm. max.
Oil seals: jt the crankshaft by placing a shim steel strtp (L = 200. 1 = 10, thickness = 0.1 mm.) around the oil thrower and tighten the bearing
screws. Remove the main bearing cap and withdraw the shim steel strip. Reassemble.
Tightening torsion of the main bearing cap screws = 72 ft.lbs (10 mkg).
Crankshaft end joat = 0.03 to 0.09 mm., adjusted by means of shims placed between the end of the bearing and the timing gear pinion.
-(
Timing gear: align the reference marks (punch marks): the line joining them must pass through the centre line of the pi&m.
Tightening torsion of nuts:
camshaft = 108 ft.lbs (15 m.kg) and crankshaft = 144 ft.lbs (20 mkg).