okay i took my GFs car to a shop to have the timing belt water pump and seals changed and i drive it home and coolant is coming from the overflow tank now and i tried to see if it had a air pocket let it cool down add water and still it boils it out the overflow, and me and my buddy block tested it and it showed that it hydro carbons in the coolant the fluid from the tester was blue then turned yellowish-green, so i topped if back off and went around the block and its still coming out. do you think the shop should be held responsible? since they worked on it ? and the crappy part it is my work haha FML all i can do is laugh cause im so stressed now...