[Fpaliwala]

I have coolant leak in my 2006 e90. It seems that it only happens when I'm driving and the system is pressurized, because I don't see any pooling when its parked. I want to do a pressure test, but didn't know which pressure test kit would work with the e90. Can someone please recommend a pressure test kit that they know would work on the e90 system?

[bmwsinceday1]

go to AZ and ask hem to "rent" for free (its free), their rad test kit. Ive used it many times, although, not on my BM as its still "new". Try it out- they have a few adapters in the kit. Good luck.

[mlifxs]

fyi in addition to the pressure test, there's a thread on this subforum somewhere, recommending a new expansion tank cap. Person claims they go bad after a few years. I slowly loose coolant without any signs on the under-panel. I'll probably order a new cap myself.