CITROEN DS 19 - Page 83

DS 19 OPERATION No. DS 112-4 : Work on the cylinder head. Op. DS 112-4 81
TOOLS
Assembly (see Pl. 1 and3).
20 To assemble the rockershaft assembly :
a) Before assembly, smear the expanding washer seating face with Hermetic.
b) To fit the rockershaft assembly :
1st and 3rd cylinders : place on the shaft, starting from the front, a spring (37), the rocker (38) and a washer (29).
2nd and 4th cylinders : place on the shaft starting from the front, a washer (29), the rocker (38), a spring (37).
NOTE – On cars produced before April 1956, if the shafts are to be removed, fit a new smooth type model.
21 Place the shaft in position on its bracket, with the lubrication hole towards the bottom. Fit the caps (7) on the
fixing studs. Tighten the nuts; when tightening, make sure that the tappet adjusting screws are properly
located in the sockets of the push-rods . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 mm box spanner
22 Adjust the valve rocker clearance to 0.008 ins (0.20 mm) for the inlet valves and 0.010 ins (0.25 mm) for the
exhaust valves (see Op. DS 112-0).
23 Fit the cups (3) and the sealing joints (4) on the sparking plug tubes. Fit the cylinder head cover, secure the
gasket with Hermetic to the cover only.
Tighten the fixing nuts (leather and plain washers) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 mm box spanner
24 Fit the 4th sparking plug (spanner 1603-T, see Pl. 16, fig. 7). Fit the bakelite and rubber caps on the sparking
plug tubes. Connect the sparking plug leads . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Spanner 1603-T
25 Fit the air filter and tube assembly. Tighten the fixing nuts (spring washers).
Tighten the clip securing the pipe to the carburettor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12-17 mm box spanners
REPLACEMENT OF AN INLET VALVE SEALING RING OR A SPRING
Removal.
26 Remove the air filter and pipe assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12-17 mm box spanners
27 Disconnect the leads from the sparking plugs. Remove the rubber and bakelite caps from the sparking plug tubes.
Remove the 4th sparking plug (spanner 1603-T, see Pl. 16, fig. 7) as a precautionary measure. Remove the
cylinder head cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Spanner 1603-T
28 Remove the rubber joints (4) and the cups (3) (see Pl. 1)