I just purchased an A4 1.9tdi 130pd and it seems to run cold only ever making 80'ish on the gauge also my heaters do not run super hot as one would expect.
I have checked coolant levels they are fine and hold steady
I have also looked for emulsification around the oil filler , this is fine so I believe the head gasket is still ok ?
anyone got any ideas ???
my only conclusion is a possible airlock in the cooling system ????
or maybe the thermostat ? stuck open