Earlier today I replaced the distributor cap and rotor, then I went for a drive and discovered that when I stop moving my car leaks coolant and heats up very quickly. I think it is coolant because it is green. When I look under my car it looks like the leak is coming from under the engine before the cat. I popped the hood and the coolant reservoir is very bubbly, I assume this is because the engine was just running. I took the car home and now I am afraid to drive it and cause more damage.