See also:

Air cleaner air temperature control - description and testing
Thermostatically-controlled air cleaner 1 On all pre-1986 models and certain models from 1986 onwards, the air cleaner is thermostatically-controlled by a vacuum operated system to provide air at ...

Ignition system component check (Every 6000 miles or 6 months)
1 Where applicable, remove the distributor cap and thoroughly clean it inside and out with a dry lint-free cloth. Examine the four HT lead segments inside the cap. If the segments appear badly bur ...

General information
1.6 litre engine The 1.6 litre CVH engine was introduced in September 1991, to replace the 1.6 litre SOHC engine used previously in the Sierra range. The engine is broadly similar to the 1.8 litr ...