Spark control system components (carburettor models) - removal and refitting

Spark delay and sustain valves 1 Disconnect the vacuum pipes at the valve and withdraw the valve.

2 When refitting a spark delay valve, the valve must be positioned with the black end (marked “CARB”) towards the carburettor and the coloured end (marked “DIST”) towards the distributor or electronic module (as applicable).

3 When refitting a spark sustain valve, the valve must be positioned with the end marked “VAC” towards the carburettor and the side marked “DIST” towards the distributor or electronic module (as applicable).

Ported vacuum switch
4 Where fitted, the switch(es) may be located in the inlet manifold and/or in an adapter fitted in one of the coolant hoses.

5 To remove a switch, partially drain the cooling system. Note that there is no need to remove the cylinder block drain plug.

6 Mark the vacuum pipes for location so that they can be refitted in their correct positions, then disconnect the pipes from the switch.

7 Unscrew the valve from its location.

8 Refitting is a reversal of removal, ensuring that the vacuum pipes are correctly connected. Refill the cooling system.

Fuel trap
9 Disconnect the vacuum pipes at the fuel trap and withdraw the fuel trap.

10 When refitting, the fuel trap must be positioned with the black end (marked “CARB”) towards the carburettor, and the white side (marked “DIST”) towards the distributor, electronic module, or ported vacuum switch (as applicable) (see illustration).

22.10 Fuel trap vacuum connection markings
22.10 Fuel trap vacuum connection markings

Spark control system additional components
11 According to model, engine and equipment, additional components such as one-way valves or solenoids may also be fitted as part of the spark control system.

12 The removal and refitting procedures for these components are basically as described previously, and provided that all attachments are marked for position prior to removal, no problems should be encountered.

    See also:

    Engine/automatic transmission assembly - reconnection and refitting
    1 Reverse the procedure described in paragraphs 1 to 25 of Section 8, noting the following points. 2 Check that the engine adapter plate is correctly positioned on its locating dowels. If necessa ...

    Crankshaft rear oil seal - renewal
    1 Remove the flywheel/driveplate. 2 Prise out the oil seal. If necessary, drill the outer face of the oil seal and use self-tapping screws and a pair of grips to withdraw the seal (see illustratio ...

    Door interior handle - removal and refitting
    Removal 1 Remove the door inner trim panel. 2 Where necessary for improved access, peel back the waterproof plastic sheet from the door. 3 Remove the two securing screws in the case of models up ...