Manifolds, exhaust and emission control systems

All models utilise a light alloy inlet manifold which on carburettor models is coolant heated to improve the atomisation of the fuel/air mixture.

The exhaust manifold is of cast iron construction and incorporates a heated air box as part of the air inlet system on carburettor models.

See also:

Spark plug renewal (Every 12 000 miles (20 000 km) or 12 months)
1 The correct functioning of the spark plugs is vital for the correct running and efficiency of the engine. It is essential that the plugs fitted are appropriate for the engine. 2 Make sure that t ...

Tailboard (P100 models) - removal and refitting
Removal 1 Lower the tailboard to the open position. 2 Detach the rear lamp wiring cover on one side of the vehicle by removing the two securing screws (see illustration). 24.2 Rear lamp wiring ...

Choke control cable - removal, refitting and adjustment
Pre-1986 models Removal 1 Disconnect the battery earth lead. 2 For improved access, remove the air cleaner unit (Section 2). 3 At the carburettor end of the cable, loosen the cable clamp bolt, d ...