Car was hit about 2 months ago. I went to pick it up from the bodyshop 2 days ago. they replaced the whole front end. Im driving it home and the temp starts to rise. I added some coolant and it was fine. Drove it for 40-50 miles and then it starts to rise again. The bodyshop never started the car only filled up the radiator/power steering, charged ac etc.. And I thought maybe the t-stat might have went bad while it was sitting for 2 months. So I replaced it and refilled. Having the same problem. Ill fill it and drive it around and as soon as the temp starts to rise the overflow tank will spew coolant out of it. Im thinking there might be an air pocket somewhere in the system? Anyone have some suggestions before I take it to get leak-down test.