Crankcase ventilation system check (Every 12 000 miles (20 000 km) or 12 months)

1 Inspect the crankcase ventilation system for blockage or damage. A blocked hose can cause a build-up of crankcase pressure, which in turn can cause oil leaks (see illustration).

35.1 Loosening the crankcase ventilation hose clip - CVH models
35.1 Loosening the crankcase ventilation hose clip - CVH models

2 On carburettor model SOHC engines, clean the oil filler cap with paraffin and check that the vent valve is not blocked by pulling it from the oil separator and loosening the hose clip (Section 42).

3 On CVH engines, check that the oil separator and mushroom valve are not blocked, and clean if necessary (see illustration).

35.3 Oil separator (1) and mushroom valve (2) locations in air cleaner - CVH
35.3 Oil separator (1) and mushroom valve (2) locations in air cleaner - CVH models

    See also:

    Weber 2V carburettor - removal and refitting
    Note: Refer to the warning at the end of Section 1 before proceeding. XR3 models Removal 1 Disconnect the battery negative lead. 2 Remove the air cleaner as described in Section 2. 3 Disconnect ...

    Rear roadspring (Saloon and Estate models) - removal and refitting
    Removal 1 Raise the rear of the car and support it on stands (see “Jacking and Vehicle Support”). Remove the roadwheel. 2 Support the suspension lower arm by placing a jack beneath the spring sea ...

    SOHC engines
    General information The engine is of a four-cylinder, in-line, single overhead camshaft type, mounted at the front of the vehicle and available in 1.3, 1.6, 1.8 and 2.0 litre versions. The cranks ...