Question 1

Split PCV diaphragm in the cam cover (1.6)

Accepted Answer

The crankcase breather (PCV) diaphragm built into the cam cover tears with age, causing a whistle at idle, rough running, lean codes (P0171) and sometimes oil being drawn into the inlet. The diaphragm is part of the cam cover, so the whole cover is usually replaced.

Question 2

Coolant leaks from the thermostat housing (1.6)

Accepted Answer

The plastic thermostat housing on the 1.6 commonly cracks or leaks at its seals, giving a slowly dropping coolant level, a sweet smell after driving and, if ignored, overheating.

Question 3

Column Integrated Module (CIM) failure (Astra H)

Accepted Answer

The CIM module behind the steering wheel fails on the Astra H, so indicators, horn, wipers or steering wheel controls stop working intermittently, often with an airbag warning light. The module must be replaced and programmed to the car.

Vauxhall AstraAstra H

Known issues and common problems

Vauxhall AstraAstra H

Known issues and common problems

Split PCV diaphragm in the cam cover (1.6)at 110000 km · 1 solutionsMedium

Coolant leaks from the thermostat housing (1.6)at 100000 km · 1 solutionsMedium

Column Integrated Module (CIM) failure (Astra H)1 solutionsMedium