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:

Crankshaft front oil seal - renewal
1 Disconnect the battery negative lead. 2 Slacken the alternator mounting and adjuster bolts and after pushing the alternator in towards the engine, slip off the drivebelt. 3 Unscrew and remove th ...

Air cleaner - removal and refitting
Removal 1 On CVH models, disconnect the battery negative lead. 2 Remove the screws from the top of the air cleaner cover (see illustration). 3.2 Air cleaner securing screws (arrowed) 3 Disconn ...

Camshaft and cam followers - removal, inspection and refitting
Note: A new camshaft oil seal and new rocker arm securing nuts should be used when refitting. 1.8 litre (R2A type) Removal 1 Remove the cylinder head. 2 Unscrew the securing bolts and remove the ...