CITROËN ID 19 Repair Manual page 63

ID 19
OPERATION No. ID 112
-
3
: Overhauling a cylinder head Op.ID 112-3
61
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8
To assemble cylinder head:
Exhaust valve seat:
For the valve seat face
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90°biconical wheel . . .
. . . . . . . . . . . 1627-T
For top clearance........................................15O0biconicalwheel..................... 1627-T
For bottom clearance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
60°biconical wheel . . . . . . . . . . . . . . . . . . . . . 1633-T
It is essential that the large diameter of the seat face should be equal to the greatest diameter of the valve (see
figs. land2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
?
Grind in the valves (suction valve grinder 1615-T, see P1.4, fig.4)
This attachment can be driven by an electrically, pneumatically or manually grinder . . . . . . . . . . . . . . . . . . . . . . .
. .
. .
Clean the cylinder head with great care,
in order to remove all traces of Carborundum from the valve chambers or gas
passages.
ASSEMBLY
To calibrate the valve springs (spring calibrator 2420-T, see Pl. 6).
4
Outer springs:
Length = 37 mm, under load of 53 lbs f 3 lbs (24.2 f 1.350 kg.)
Length = 28.5 mm, under load of 115 lbs f 6 lbs (52 f 2.800 kg.)
b)
Inner springs
Length = 24.5 mm, under load of 11.5 lbs f .75 lbs (5.250 f 0.300 kg.)
Length = 16 mm, under load of 24 lbs f 1.25 lbs (11 f 0.600 kg.) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
a) Fit the valves (spring compressor 1614-T and support and base assembly 1616-T, see P1.5):
Oil the faces and stems of the valves. Place the valves in position.
Fit a sealing ring (30) on the inlet valve
stems only (see P1.3, fig.2).
For each valve fit one thrust washer (31) for the outer spring and one shouldered thrust washer (32) for the
inner spring.
Fit the exhaust valve springs. Fit the spring thrust cups,
the retaining ring housing cup and the retaining
rings(see fig.4)
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
NOTE - It is important that no sealing rings should be fitted on the exhaust valves.
TOOLS
Wheels 1662-T
1630-T
1627-T
1633-T
Valve grinder 1615-T
Spring calibrator 2420-T
Spring compressor
1614-T
Support and base assembly
1616-T