hi i can help you. as long as the fluid is full it will not over heat.you will need to preasure test the system to find the leak.that will help you to find the leak.if you decide to do it your self you will need a air compresor to put presure in the system.make sure that you do NOT put more presure than the rad. cap shows or you will do damage. or you can bring to your local mechanic.
if this has helped you please hit the accept link and leave feedback i will do the same.a deposit is not a accept thank you and Happy Newyear.thanks ray