Hi everyone recently purchased an Avensis Estate 2.2 D4D high miles but great car apart from the poor heater?? I have carried out the normal internet searches and seen the head gasket stories, but I don't believe its the head gasket as the car reaches operating temperature (needle half way) and stays there under all conditions. In a month it has not lost any coolant, no mayonnaise under the oil cap and the oil is clean-ish. The water feed pipe to the bulkhead is hot in the cabin the fan run