DS 19 OPERATION No. DS 112-4 : Work on the cylinder head. Op. DS 112-4 80
TOOLS
11 Fit the cups (3) and the sealing joints (4) on the sparking plug tubes (see Pl. 1).
Fit the cylinder head cover, secure the gasket with Hermetic to the cylinder head cover only. Check that the
gasket and the bearing face on the cylinder head cover are properly clean.
Tighten the fixing nuts (leather and plain washers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 mm box spanner
12 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
13 Fit the air filter and tube assembly. Tighten the fixing nuts (spring washers). Tighten the collar securing the
piping on the carburettor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12-17 mm box spanners
14 Fill the radiator. During this operation , open the vane of the heater control and bleed the water system.
REPLACEMENT OF AN EXHAUST ROCKER ASSEMBLY
Removal (see Pl. 1 and 3).
15 Remove the air filter and tube assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12-17 mm box spanners
16 Disconnect the leads from the sparking plugs. Remove the rubber and bakelite caps from the sparking lugs.
Remove the 4th sparking plug as a precautionary measure (spanner 1603-T, see Pl. 16, fig. 7) . . . . . . . . . . . . . . Spanner 1603-T
17 Remove the cylinder head cover, the sealing joints (4) and the cups (3) from the sparking plug tubes . . . . . . . . . . 12 mm box spanner
18 Remove the rockershaft assembly fixing nuts. Remove the rockershaft and the caps (7) or the distance pieces . . . 12 mm box spanner
19 To strip the rockershaft assembly :
Remove the washer (29), the spring (37) or the adjusting washer (1
st
arrangement), the rocker (36 or 38).
Remove the expanding washer from the shaft with a punch. These washers must be renewed after each
dismantling operation.
Carefully clean the inside of the shaft with a metal pin and make sure that the lubrication holes are not blocked.
NOTE – To replace a bracket, it is necessary to remove the inlet rockershaft (see paragraphs 4 and 5, this
operation).
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