810 Westchester over heating

Distilled water is the best type of coolant fluid for heat transfer. What anti freeze does is changes the boil point of the water. I run nothing but distilled water in all the cars and trucks plus a maximum of maybe 30% high quality anti freeze. It actually transfers heat better than a 50 50 mix.. I ruined a few radiaters in my diesels because of the tap water mineral dropout. The distilled water has no minerals to drop out so the system runs cleaner longer. Think about a tea pot that been used for a long time. As the water boils in them the vapor leaves the pot. Whats left is the hard minerals. No amount of soft water is going to give you the same results as true distilled water. If you find you need a little more that water try adding Redline Water Wetter. Or check out what many street rods run to keep their engines cool. There are a host of water wetters out there by many differant makers.

DO YOU RUN COOLANT IN THE INTAKE MANIFOLD?

Tried adding an electric fan to an 812 unsupercharged a few years ago; didn't help. I suspect the challenge is that the heat builds up under that lovely coffin nose, and the electric fan is not powerful enough to clear the air. This is supported by the rather dramatic temperature reduction that occurs when the hood (bonnet) is opened. (rigged it up at one point so that you could drive at low speed with the hood open about 3 inches; amazing difference, but lots of odd looks during parades). At driving speed there is enough turbulence to clear the air, so no overheating.

Dennis, are you using antifreeze or water as a coolant? If you are using antifreeze try water. It will run aproxamitly 15 degrees lower.
CORDially Mike

Are there other coolant brands like this evans brand? Evans claims higher heat transfer at the elevated temps, but you must have the radiator, coolant pump and engine block all working at optimum specs. If you have cooling problems because of rust in the block or some of the radiator core dirty or coolant pump not working properly--this coolant is not a cure. I would try this on my fresh rebuild.

Maybe this was a solution www.evanscooling.com/

You could hang a fan just in front of the radiator, but it would need to be slid into some fixture and you need a auxhillary plug that is permanently fitted to the car with a inside switch. Not big trouble but the fan will draw a lot current from your batterie, so you better carry also a batterieboosterpack, regards Philipp

The car's heater used in high blower speed mode, with the car's windows open, has worked well for me several times to lower overheating due to slow moving traffic situations.
You might be shocked at how fast the heater used in this manner will lower your system's radiator & engine temps.

I really don't like the electric fan idea ~~~

Hi Everyone, I just went to Concours this past Sunday, big show that you had to be invited to. The entrance to the Concours was long and slow. I watched the temp gage go out of site. I finally got onto the show field and the radiator boiled over not too bad but I was a little worried. Since getting home with no problems I have been looking at how I could install a temporary electric fan that could be removed easy. Something that could be put in and out on hot days and removed at a show. Without reinventing the wheel I was wondering if any of you have done this already. On a good note my 810 Westchester took "Best Pre-War Closed" trophy, a beautiful crystal trophy similar to the ACD Reunion trophy.