CITROEN DS 19 - Exhaust system

DS 19 DS 180-1 Work on the exhaust system. Op. DS 180-1 129
TOOLS
REPLACEMENT OF AN EXHAUST MANIFOLD
Removal.
1 Release the pressure in suspension system. Unscrew the bleed screw of the pressure control valve and place the
manual height control lever in the low position.
2 Remove the air filter-silencer assembly and pipe between the filter and carburettor . . . . . . . . . . . . . . . . . . . . . . . 12-17 mm box spanners
3 Remove the suspension sphere from the front right-hand suspension cylinder (strap wrench 2223-T, see Pl. 93,
fig. 1).
Close the openings of the suspension sphere and the suspension cylinder (see Pl. 94) . . . . . . . . . . . . . . . . . . . Strap wrench 2223-T
4 Remove the exhaust manifold fixing screws. Remove the screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 mm spanner
12 mm box spanner
5 Remove the flange coupling the downpipe to the expansion chamber . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 mm box spanner
6 Unscrew the manifold fixing nuts. Remove the manifold screen retaining clips . . . . . . . . . . . . . . . . . . . . . . . . . . 12 mm box spanner
7 Remove the exhaust manifold. Remove the gaskets.
Refitting.
8 Place the manifold in position and insert the copper and asbestos gaskets.
9 Fit the manifold screen retaining clips. The longest upper clip is fitted at the front.
Tighten the fixing nuts of the manifold and the manifold screen retaining clips (spring washers under the heads). 12 mm box spanner
10 Unscrew the fixing nuts of the collar securing the expansion chamber . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 mm box spanner
11 Put the flange, coupling the expansion chamber to the exhaust manifold in position. Tighten the nuts (spring
washers under the heads).
Tighten the nuts fixing the collar, securing the expansion chamber . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 mm box spanner
12 Put the manifold screen in position. Tighten the fixing screws and nuts (plain washer) . . . . . . . . . . . . . . . . . . . . 12 mm box spanner
13 Fit the suspension sphere on the right-hand front suspension cylinder.
14 Fit the air filter-silencer assembly and pipe between the filter and carburettor (spring washers under the nuts
fixing the air filter-silencer) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12-17 mm box spanners
15 Start the engine. Tighten the pressure control valve bleed screw. Put the suspension system under pressure.
Check the joint between the suspension sphere and suspension cylinder for leakage.