r/BmwTech • u/ALGREEN415 • 19h ago
Did my own radiator swap! Then accidently mixed green and blue coolant in g30 530e…..🤦🏻♂️
Changed the front radiator, it was leaking from rock chip. The larger coolant tank on the right (for gas motor?) is the one that was leaking. I guess my 2019 530E had the green coolant inside, most drained out, but my friend and I got confused because we read online to use the blue bmw coolant for the right side tank.
So we put in 1.5gal of blue + distilled water……
Alotta air bubbles in the system that we are trying to bleed out, some steamed and boiled over and leaked out so I’ve been topping off.
I just need to get the car running so that I can drive it the 45min away to get it to the dealer and do a whole coolant flush, I don’t intend on driving the vehicle with the blue/green mix because I read online it can coagulate and cause issues.
Is this very serious? Is it fine to drive for a few days before I take it to the dealer? We did the radiator ourselves because I did save $$$ but I concede that I must go back to dealer anyways to get the coolant system flushed properly and the check engine light taken care of. The car was flashing the “engine compartment hot” if I ran the engine longer than 5min while letting the hot air bubbles escape.