Hi,
New here but I've got quite literally the exact same issue. 2014 MK7 2.0 TDI.
Expels the same way as you've shown in your pic after a long journey. Again with all tests done on heater matrix, egr, head gasket etc.
The only other thing I'm trying is to only fill the coolant half way on cold. It seems a huge pressure dump is causing the coolant to overflow so hopefully with it only halfway there's more then enough room for expansion.
If you find any other potential fixes please post on here, I've just bought the car so definitely a p*ss take.
New here but I've got quite literally the exact same issue. 2014 MK7 2.0 TDI.
Expels the same way as you've shown in your pic after a long journey. Again with all tests done on heater matrix, egr, head gasket etc.
The only other thing I'm trying is to only fill the coolant half way on cold. It seems a huge pressure dump is causing the coolant to overflow so hopefully with it only halfway there's more then enough room for expansion.
If you find any other potential fixes please post on here, I've just bought the car so definitely a p*ss take.