why do I need to change expansion tank and radiator cap?
Originally Posted by QAfred
It is simple, but make sure you change expansion tank and radiator cap too. Do some research, lots of info on cooling system overhaul.
E90 318i 2007 N46 2.0 Manual
E53 X5 2004 M54 3.0 Sport Auto
E83 X3 2004 M54 2.5 Auto