Source for 6 volt electric radiator fan 1940

"I do have all the factory shielding on the car."

Does that include the shield under the fan and radiator which stops the fan sucking free air up from under the radiator?
 
I experienced a kind of vapor lock in slow traffic the other day so I did a few tests .Air flow equals cooler running .With a cloth over the front I ran this car at a fast idle until the tempt came up to over 200 ,I then removed the cloth but the temperature did not drop .Then I fitted this shroud and the temperature started to come down .Any one who is rebuilding there radiator and running there cars in hotter climates should consider a extra row of tubes .The radiator here is not the most efficient because of the shape of the tubes, the tubes need to be staggered not one behind another. One of my Jap cars started running hot lately, you could hear the fan switch on .When I turned on the heater it then brought the temperature right down, its almost running as affiant as the main radiator so air flow or added 10 % more radiator may do the job .
 

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Drove the car all day on back roads and on the interstate in 64 degree weather with not a cloud in the sky. On the back roads running around 55 mph the car ran just above the N on the temperature gauge with no thermostats. On the interstate running 60 to 65 mph the temperature gauge ran on the H after about 20 miles. I pushed the clutch in and let it coast down a long hill and the temperature dropped to the high N mark. Within 5 miles the temperature was back on the H. When I pulled over to check the temperatures with the heat gun the gauge was on H. By the time I got the gun out, and the hood up the gauge was reading high N with the engine at idle. I checked the radiator upper tank with the heat gun and got 176. Checked the body of the radiator and got 182. Checked the upper radiator hoses and got 174 with the lower radiator hose reading 170. Checked various parts of the heads and got 178 to 204. Check the heads at the spark plugs and got 194 to 200. The car has a 373 rear end gear. Sunday I'm going to flush the entire system and fill it up with white vinager. I will drive it around for about 2 days and see what I get out of the radiator. This car sit from 1962 until 2007 so the block may have build up in the water jackets. The water in the radiator has some brown junk in it now. I'm about to give up on this deal. Car runs good on back roads and heats up at higher RPM on the interstate.
 
Mr L78, between top and bottom its only dropping 4% ? After the white vinegar sits a weeks or two ? you could fire some water through the lower hose as any junk in there can sit on top of the tubes.you should pulse it with compressed air mixed with the water , .But .The only sure way is to remove one of the tanks and rod it out ,My car comes up to 200 at times but I don't worry about it
 
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Ted, should I drive the car with the vinager in the cooling system or let it set? In the past I drove the cars around about two days and drained it. Are you advising me to leave the vinager in the cooling system for about 2 weeks?
 
Two weeks yes and drive it ,You can see some posts on the model A site ,The best way is remove a tank and get it rodded out .You did say that the current Radiator is not that old ?? if so a the vinger and a shock flush from the bottom should improve things
 
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Ted, I flushed the cooling system today and installed 4 gallon of white vinegar. The flush did not show very much grim. The radiator interior looks almost new after the flush. I also cut a card board piece and put it under the fan to extend the factory lower radiator pan all the way back to the front of the oil pan. I drove the car about 30 miles around town in stop and go traffic and on the open road. I have to say the card board or the flushing one has made a difference I can see in the temperature gauge. The car runs on the N and in stop and go traffic the temperature gauge went up near the high N area, but came back down to the N within a mile of open road driving. That is much better than in the past few weeks of driving. I think we are on the path to a solution. I will post again when I can drive it on the interstate for about 50 miles at 60 to 70 mph.
 
Its sounds good, the added shield like the previous guys post is a good thing for the narrow nose .A shroud does improve the fan action by at least 30% ,I know you have a 6 blade fan on a good functioning system a four blade should be enough on a 40 .Ted
 
FlatheadTed
What did that fan shroud come from?
I'd like to have a schroud on my 32
Thanks
Jim
 
The one in the picture Jim came from a 90 to 95 Volvo in a junk yard ,Its plastic cut so it slides in from the side in two halves .The people who sell the flex fans possibly have a specialized unit ,The 34 with Flex fan I mentioned came from the states so there must be a source out there .
 
The explanation of hot air under the hood moving forward and recirculating through the radiator makes sense. Would this be justification for adding louvers? Who's up for punching a few dozen louvers in a pristine '40 hood??
 
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