Originally Posted by BMW535
My car is out of maintenace warranty. It has only 30K miles and dealer recomended to perform coolant flush. They want $275 for the flush. I know it is a easy job; however, I'm concerned bleeding the system correctly. These cars don't have temperature gage and it would be hard to know if the engine still has some air inside and its running a little hot. Any advise?
Way too pricey for the drain and refill. It's pretty easy to do and bleeding the system is described on a post here somewhere in DIYs. If you're concerned I'm sure a BMW-experienced indy can fix you up for less than 1/2 what the dealer quoted.
BTW, the term "flush" is tossed about a lot; in my opinion it was more applicable is the old days when cooling systems really got gunked up. Back then the practice was to drain the system, add corrosive chemicals to remove scale and sediments, flush with plain water, drain and refill with 50-50 mix.
Simply not (again in my experience) the case with todays cars, properly maintained, with the correct fluids. Today it's more like drain and refill ... indeed, adding flush chemicals might actually damage the sensors scattered throughout the internals of our engines.