OOk I know this is out there but ever sence I got my car back on the road Ive had problems with over heating. I've tried bleeding the system numerous times and also I bought a new cap. Now because the weather is colder I am using the heat in my car but the heat cools off when I am stoped, and when I am driving the heat come back. Now my though is that there is a vacume leak some where in the car and it is causing the heater not to work proply, and also helping the car over heat.... but when I do drive everytime I add water and and can't figure out how to fix this problem... I plan on a coolent flush to get ready for the winter but I want to figure out the problem before hand... all imput will help out.