My 96 lumina 3.1 randomly overheats (well, about every 2 or 3 drives). I have replaced the intake gasket, the water pump, and the thermostat. The radiator cap is also fairly new. I have a tiny leak at the plastic tank on the radiator (near where the upper hose connects). When I add water, it seems like it can't get enough. My questions are:
1. Can my leak cause all of these problems?
2. Can I remove my thermostat in an attempt to relieve some of my symptoms?
3. How do I get rid of ALL of the air bubbles in the system?
Also, is it normal for the heat not to get hot?