No reason to "take" the car somewhere to get it flushed. You HAVE to drain the coolant anyway to do the T-stat and housing so why not do it yourself since you are 90% there already? Changing the T-stat and housing can be a pain if your fan doesn't want to come off.
Just follow the link Pirate provided and you'll be fine. Also, if you have access to ramps, this is the best way to flush and refill the system. The higher you get the bleed plug, the faster your bleeding will go. When I did mine, I had it up on ramps and I drained the radiator AND the block. The block plug is behind the exhaust manifold. Be careful when you remove it, it's best to unscrew it part way and let it drain cause if you don't, it will come rushing out all at once and create a HUGE mess. (ask me how I know) Then simply plug it up and refill. Follow the directions in the link for refill and bleeding.
Please use factory BMW coolant and DISTILLED water!
Last edited by jasonf860; 06-30-2007 at 07:29 AM.