I've been thinking about doing this at some point too. BMW think it's lifetime fill but I'll not be taking my chances.

On F3x cars you pull the hose off the bottom of the rad to drain. F2x cars are probably the same. The car has a built in self bleed system as well, where you open the bleed screw and run a bleed cycle. I can't remember the exact method of launching it but it involves something like turning on ignition, pressing accelerator a certain amount of time and having heating set a certain way. There are threads on bimmerpost forums about it.

 

Coolant flush diy for n55.

http://f30.bimmerpost.com/forums/showthread.php?t=1210850

http://f30.bimmerpost.com/forums/showthread.php?t=1278783

 

Excellent, thank you.

Can anyone confirm how long the additives in G48 protect the waterpump/engine for? I know it's definitely not lifetime (unless BMW mean life of their 3 year warranty period)!

 

According to Glysantin themselves it should be replaced every 3 to 4 years as it's properties break down and it becomes more acidic so I'm not sure how BMW approve it for the lifetime of the vehicle!

http://www.glysantin.de/en/faq.html

 

Ace, top man.

I think I'll be going with genuine BMW coolant to avoid mixing brands (pretty sure it's not expensive), in the summer.

 

Easy DIY, you're only pulling a pipe or two.

 

Ordered myself a couple of these:

http://www.ebay.co.uk/itm/191954053388

Job for the summer.

 

I completed the coolant change on my M lite today and posted a DIY in the How To section...

http://www.babybmw.net/forum/viewtopic.php?f=29&t=96130