Originally Posted by zazzn
I know nothing about BMW's and nothing about the E90's except what I just read her today. I'm coming form a supra background and have been in the supra world for 10 years. All of my cars including my DD's where 2jz-GTE's making over 400 WHP so excuse me if I seem a little green regarding cooling problems with the N54 in the E90's.
BMW's have gotten very complicated, to deal with. Note this, especially when coming from a simple-to-work-on supra. The only time you will run into any cooling problems with the N54 is if you track the vehicle. The stock cooling is as insufficient on the track as the 2jz-GTE--> See comment number 7
I was all set to buy an '09 ISF a few weeks ago, but when I did some research on the car through the forums, it seems like their stock cooling is just as bad as my 335I's, with NO engine, or trans oil cooler, other than through the over burdened coolant. The car even shuts down at the track: