Alfa 156 coolant problem
I suspect I may already know what this problem points to but...I have a 156 with a decreasing coolant level. The coolant is still the same antifreeze color but the level drops to empty the header tank after a run of around 100 km.
The underside of the oil filler cap has a white frothy scum on it but the oil on the dipstick is clear, not cloudy. Could the water be going anywhere else apart from into the head, indicating a leaking head gasket? There is a slight oily smell in the header tank. There are no visible leaks on the cooling system or onto the ground.
This 156 is a 1998 2.5 litre V6 manual with 134,000 km on the clock, cambelt etc done around 20,000 km ago.