Replaced the expansion tank on my 2002 4.4. I tried to only replace one part for a change, as opposed to everything I touched. This was a bit out of the norm for me, so of course two leaks developed. A week later a new coolant hose and radiator drain plug and back up and running. So glad to be behind the wheel of a BMW again! One question for the group....One bolt between the expansion tank and bracket will not fully tighten or loosen. I think there is a nut that continues to turn inside the bracket. The other bolt fits tight. Should I pull it all out and replace the bracket or let it go?