Hi, I need some advice about my cars coolant situation...I'm a newbie, so please, bear with me. I have a 95 3.8 v6 with 160k miles. When I bought the car, it had a t-stat housing leak. The car's temp also ran below halfway, only reaching the halfway mark in a traffic jam. So, the shop attempted to fix the leak, it took three times before it was barely leaking. Meanwhile, I had to keep topping off my radiator. Once the leak was fixed, I still had to top off the radiator. ( about 2 inches) The shop said I was being paranoid and that I should never check the radiator. Well, I bought a new cap, and the losing coolant problem was gone. Then I noticed coolant on the ground, it was my water pump. So, a friend of mine fixed the water pump and changed the thermostat.(he fixed the t stat housing leak on the first try!) He said there were bubbles in the radiator so he put stop leak in the car to fix the supposed head gasket problem. So, new thermostat and my car is running much warmer ( 3/4 to hot) than normal. Oh, and I had to get another new radiator cap. I took it to another shop because I didn't like the fact that it was running so hot. The new shop checked for hydrocarbons and there were none. But, my coolant temp sensor was shot and I had hot and cold spots in my radiator. So, they put in another new thermostat, and a radiator, and coolant sensor. They checked it twice for hydrocarbons (once before they changed the radiator, and once after) Also did a pressure test. All was fine. But, I am still having to top off the radiator. The shop also put on another new radiator cap. (I've been through 4 caps now) The car's temp now runs at halfway, sometimes a little more if I am in traffic, or going up hill, but never less than halfway once it gets there. Can someone tell me if that temp is normal? And where the heck is the coolant going? No visible leaks. Could it be air bubbles? Thanks