Hi my first post. Is anyone here running Ford E450 6.0 engines. This particular bus is an 04. Clean coolant and oil. We have wheel chair corbiel body busses. Under a load rear heat is fine. stop the bus and temp cools right off in the rear. I'm sure theres an issue because theres no booster pump. My concern is modifying factory setup and being liable. I was with Laidlaw for 14 years and now with first Student lets just say I'm a stressed out service manager from the northeast.