Evening chaps,
just had the cambelt and water pump done on my sons 2012 A3 8P 2.0 TDI . Mechanic said it took just over 4.5 LTRS of Coolant and may have an airlock but have heat in the cabin . Drove it home with the heater on and temp reached 90 degrees then when sat in traffic with blower on the temp reduced to 75 degrees (not normal as it should maintain 90) got home checked the level and managed to squeeze in another half litre. Took the car out along the motorway a little later , car got up to 90 degrees , heater nice and warm , and again at traffic lights temp reduced. Got home , removed the coolant cap , no hiss , as it wasn’t pressurised , coolant Luke warm after indicating 90 and 20 miles of motorway driving ! No coolant loss this time . Could it be airlock ? If so how to get rid ? Or thermostat ?
Thanks