Best you check this out-crossover cooling pipe

[TOMBOB]

Have 2006 Vector was doing soom coolant bleeding found the crossover pipe rivets had come loose.
The pipe has a bad worn spots(1/8") from bouncing on rear support. This could have been a bad problem
if had worn through. Iam going to temporay fix for now, then replace it this summer.

Be sure check yours to prevent coolant problem.

TOMBOB

 

[Bradford]

Same thing here on my 06 Nytro. I found it while I was looking things over. It's not worn through yet but it's close. 13800 miles