Originally Posted by SlickGT1

I recommend you switch to a 1.4 bar expansion tank cap as soon as possible. Instead of the car letting you know you have a problem by letting go at the cap, the 2.0 bar is stronger than your brand new hoses, and let’s go by blowing slightly used cooling parts.



This isn’t some high performance cap. I know someone with a v12 Lamborghini that has a 1 bar cap. This is bmw perpetually making sure there is a client list for exploded tanks, hoses radiators and valley pans.



Swapped mine out years ago and never looked back.