Hello, I have a Cadillac Escalade from 2017. But the cooling water systems are similar everywhere. I have to catch up first. I changed the hydro plunger left bench with me. ( Lifter tick ) Therefore I had to drain the cooling water. So everything was assembled again and filled up water. As far as so good. Now I have to push myself slowly. Engine on, heating at the rear and front on HI and lid to get the air bubbles out of the system. Engine will sink warm level and I tilt After that he then demanded nothing more ceiling on it and well. Then when cooling it sank again by 3-4cm. So I have refilled to “Filling level with cold water”. First test drive: Pointer goes after 7km quite fast on 1/2. Then falls after 1km again to 1/4 then to 0 then it goes again on 1/2 etc. Then I thought OK he opens up the individual cooling circuits and swings because of that (with Audi and co the software remains simply regulated in the middle) od he still made air in the system?! So again this venter play with lid off etc.. First question: I then when he was warm once gave a small V8 gas shock and then shot me a Fontaine cooling water out of the container. May this be right ? I then filled up everything again. On several trips I then found that under the car were always a small puddle after the parking. I tried it is cooling water. I could under the balancing tank Feuc I also noticed that I have 0 pressure on the system. Had I dared to take off the lid after driving and not hissed anything. I then had a pressure test done 1Bar 30min no loss. Ha? So it could be the lid. But it is only wet under the balance tank, nothing on the lid or insulation from the bonnet. Must say that under the container can also be old cooling water. How can the system keep the pressure with a test but after a ride there is no pressure on it? Are there printless systems? What can I check? Unfortunately, always have to wait 2 weeks to order something from the USA. Cheap shipping is also not. Thanks already and sorry for the long text.