u/Affectionate_Cat7058

Hi! I am having an issues with my golf 7 2.0 tdi 2014 crbc engine. I am slowly loosing coolant, about 500ml every 1000-1200 km. So, i changed the intake manifold that has the radiator integrated. I changed the antifreeze coolant reservoir. The water pump was just changed along with the timing belt kit. The heater core was also changed. I am still loosing coolant and i cant see where is goes. I was thinking of the egr cooler next. How can i check if it is broken? Or do you have any other ideas? What happens if i keep driving the car and fullfilling with coolant? Do i get anything clogged? I am already desperate. Thank you in advance!