Hello Forum members, after our workshop is hard to find, the considerable cooling center loss of our Peugeot Boxer (2.2 HDI 150ps, year 2012…130000km ATM) I hope to find someone here who might have more plan or at least more ideas. Short history: We have found an increased coolant loss with our transporter and then I ordered a print-set (China scrap) and thus pressed off (engine cold). A leak and pressure drop were nic After it was not better, of course, we brought the vehicle into a free workshop, with the hope of repair or solution. Well, first information was that a low CO2 share in the cooling water was to be proven and we were advised to exchange the ZKD. We agreed to this along with additional work. Said (additional) works were: * ZK for X-ray and scheduled grinding skillfully * motor coolers exchanged * climate condensator exchanged * thermostat exchanged * Zig gaskets etc. Total cost incl. work: 4.500 .-€ vehicle is now back and see there…significant cooling water loss still exists! By considerably I mean (a whole balance tank) on 80Km distance. Engine temperature remains at 90° and no smoke (except shortly after cold start). Now I have with said China pressure pressure again (1.3 bar) this time 15 minutes after the engine has reached operating temperature. -> Look there… pressure drops after about 20 minutes around c a. 0,2 bar off. -> Now open the pressure valve and the water will not come back again (printing process started at MAX marking and the water disappeared in the cooling system after I took the pressure out again it only came back to the MIN marking) -> Still no leakage visible…. What was definitely wrong after that is the following: After the print-off process including pressure loss I did a short test drive and had to find out that it was extremely good at first. It seemed to me that the coolant had somehow landed in the exhaust track. Now the good DIng is back in the workshop and the “master” only shakes his head. Therefore I would be grateful for any IDee or solution proposal. I could have had the complete engine repaired at Rudi for the money. Sorry for the long text!