No, there is no white smoke when the car is driven. It sounds like air in the system, because the car does tend to start running hot. How do you get the air out. I finally found a service manual for the car, but it won't be here until Friday or Saturday. I think I'll have the pressure test done. It seems like the prudent thing to do. Just one question. What the heck is a belly pan, and where is it located?!?