Dan, I live in Arizona. We have the best summer weather to check out our radiators and cooling systems. After I bought my car twelve years ago, I replaced all the cooling hoses, the radiator, the overflow bottle and connected the cooling system air bleeder to the hoses in front of the overflow bottle. I have never had a problem with overheating in the last twelve years in Arizona, in 114 degrees weather. I run our Delorean year round in Arizona. On a typical summer day in the summer the temperature gets to 114 degrees and higher. The Delorean is no different than another car when it comes to the cooling system. Take care of the cooling system and the car will cool itself, but you must have the car back to it's original intended purpose for this to work--except of course for the cooling overflow bottle and radiator. Please replace your overflow bottle and radiator--the originals are not as good as the replacements that are available from our suppliers. Someone else will have to help Dan and the other owners on how to get their cars back to their original intend purposes. That is another reason to join your local Delorean Chapter. The cars are very good at cooling--their automatic transmissions are very good at shifting--the problem is with the owners and the previous owners. There is enough information on the webs for us to fix our cars for their intended purpose. Take out the toggle switches and the "Y" connections and replace them with the FanZilla and finally fix the automatic transmissions. Twelve years ago I replaced my alternator, the overflow bottle, replaced all the cooling hoses, replaced the radiator and replaced the "Y" connection with the fanZilla--three years ago I fixed my automatic governor as recommend by this list. I have been running the car for twelve years with no mechanical problems. Yes, this winter I will be replacing my cooling hoses again--I do not recommend running a car for twelve year on old hoses, and yes,. my dash will be my next project, but my car mechanical runs like it's in heaven. Welcome to the Delorean list and to the Delorean globe. Sorry for the long story. Please check out the Delorean list, check with your local chapter and fix the problem right the first time, but continue asking your questions to the delorean list. We can only learn by our questions. Dale > the previous owner of my dmc hooked up a toggle switch to keep the > fans running to prevent an overheat. I am not crazy about this type > of engineering as i would like to fix the problem. I know that other > owners have wired similar switches to prevent overheats as well but, > as i am new to deloreans.....