You will need to go get a cooling system pressure test done, all workshops can do this test, it takes a minute or so to do and they should not charge you.
Oct 24, 2012 at 10:11 AM
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.