So I bought a used 2018 Turbo Dynamics and finally got my first trip to the dunes last week. Ran fine for 3 days and on the fourth day I went for a quick ride before we loaded up to come home. Ran about 10 minutes hard and it went into limp mode and within a minute shut down. I had the GPS screen on and was not really watching the temp. Got towed back in and came home. I have read a bunch of turbo overheating threads and most pertain to the 2016s'. It appears that the most common problem is air in system. My question is should I look for something else first (thermostat, water pump) or just go ahead and change all three before I bleed the air from system? The air purge seems to be rather time consuming.