CITROËN ID 19 Repair Manual page 65

ID
19
t
OPERATION No. ID 112-4
: Work on the cylinder head
Op. ID 112-4
63
I
PARTICULAR POINTS
Replacement of an inlet rockershaft assembly.
Removal
1
Drain the radiator and the crankcase.
7
8 Place the shaft in position with the rear bracket (with the lubrication holes directed towards the bottom and tozzards the valves).
10
Tighten the screws$xing the cylinder head: 1st tightening - 21.75
ft.
lbs (3 m.kg), 2nd tightening - 43.5 ft.lbs (6 mkg) (do not exceed the tightening
21
27
28
32-33
Remove the bracket
of
the last exhaust rockershaft assembly to permit release
of
the last fixing screw
of
the inlet rockershaft and cylinder head. Re-
move the 4th exhaust rockershaft assembly, t
n
e first five screws fixing the inlet rockershaft and their caps, the washer and
spring
of
the first inlet rocker, in order to disengage the inlet rockershaft with its rear bracket).
Assembly
torsion and observe the order
of
tightening indicated on P1.7).
Adjust the valve rocker clearances: Inlet - 0.008" (0.20 mm), Exhaust - 0.010" (0.25 mm) (see Op.ID 112-O).
Replacement of an exhaust valve rocker assembly.
Place the shaft in position with the lubrication holes directed towards the bottom.
Replacement of an inlet valve sealing ring.
-
Removal
Raise the rocker assembly and remove the rocker pushrod
of
the valve
in
question.
With the piston
of
the valve in question at T.D.C., release the rocker at the side, place the collar MR.4244 in position and compress the valve springs
(see Pl.5).
Assembly
Unscrew the cylinder headfixing screws (right side). Tighten the screws (both sides): 1st tightening - 21.75 ft.lbs (3 m.kg), 2nd tightening - 43.5 ft.lbs
(6 m.kg) (do not exceed the tightening torsion and observe the order
of
tightening indicated on IY.7)
Replacement of a valve spring.
This operation is only an emergency repair.
If
the engine
has
been running
for
some time with a broken spring, the valve will have to be
refaced.
Cleaning a cylinder head filter.
This operation should be carried out after every 3,700 miles (6,000 kms). Wash the jilter element in petrol, immerse in engine oil and refit.