In this video I will talk about my experience with invisible/internal coolant loss on my Audi A4 Allroad, B8.5, engine code CNHA, 2.0 TDI Ultra 190 HP. It takes good knowledge, logic and good testing to fix it. I will explain the different scenarios for the internal coolant loss and some external coolant losses. I will also explain how to put your logic into work and how to decipher the tests results.
There was no smoke, no overheating issues just a small but constant coolant loss. One thing I forgot to mention is the we did a smoke chemical test for the coolant itself. It showed positive.
