Hi I had the idea to remove the fresh air intake so that the engine only sucks air from the engine room. It is an M57n2. In addition, it is possible to stick off the charge air cooler. I would like the engine to warm up faster! At the moment I have the whole without heating after 5.5km 65-70 degrees cooler water temperature. Or I reach the opposite because the warm air leads to a reduced power and thus a colder burning temperature which in turn leads to a long At present, AGR is inactive. However, after 5.5km I have only 6-8 degrees more of the known disadvantages. Covering the cooler doesn’t help much because the thermostat is closed and the large cooling circuit is closed. What do you think?