Radiator, Water Pump and coolant system accessories for 1993 - 2000 GM 6.5L Turbo Diesel. Overheating issues? One of the most common overlooked items when trying to combat high engine temperatures is that of the factory radiator. The factory radiator can accumulate loads of road debris and engine grime that works its way into the inner core, potentially destroying the cooling capabilities. Check out the Mishimoto performance radiators and intercoolers for a superior cooling system that just flat out works.