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Unread 09-19-2015, 11:25 PM   #1
Jeepblur
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1982 CJ8 
 
Join Date: Jan 2014
Location: Raleigh, NC
Posts: 49
electric fan thermostat switch

I finally changed my radiator to a three core aluminum. And while I had the coolant drained, I also did the heater motor upgrade. So with the old copper radiator, I had just directly attached the electric fan to the radiator with those plastic push through mounts. Those suck. Don't use them. They will cause leaks. Anyhoo. The problem was mounting the electric fan. So I get these really simple ideas that I guess no one else gets. So I thought about mounting the fan using two thin bars across the radiator mounts. It seems to work. I'll let you know. I'll also load some pics. Again, anyhoo. The problem I have is with the electric fan thermostat switch. The old radiator was a stock two core, so the copper probe was cut to fit. Now it's not long enough. And you can find the copper probes! You have to buy a new kit. I may have to just find a copper rod and solder. The new radiator has two threaded holes in the bottom for mounts or another cooler or something. Could I just get a sender and bolt it in the bottom of the radiator? I mean, isn't the return water temp what you should really be concerned about with any fan? Just need some input!

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Unread 09-19-2015, 11:30 PM   #2
Jeepblur
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1982 CJ8 
 
Join Date: Jan 2014
Location: Raleigh, NC
Posts: 49
Here are the fan mounts:
img_4110.jpg   img_4109.jpg  
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Unread 09-20-2015, 01:53 AM   #3
StoneTower
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1985 CJ7 
 
Join Date: Jan 2015
Location: Fair Oaks, CA
Posts: 114
Your two thin metal bar idea may be fine but I would make them out of 1/4" stock and tap them for the bolts. I would then use blue Loctite to secure the bolts that were cut so they did not stick through the bars. I would not want the head of the bolt near my new radiator.
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Unread 09-20-2015, 07:23 AM   #4
hp_lovecraft
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1981 CJ5 
 
Join Date: Sep 2009
Location: Maine
Posts: 1,151
Those threaded senders are pretty cheap. I bought one off ebay for $3 not that long ago. I don't know about those ports on the radiator, but I used a common solution- Replaced the CJ thermostat housing with the YJ version. It has a built-in port for a thermostat switch. They were only $10 or so at the local parts store, though the finish was terrible.
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Unread 09-20-2015, 10:49 AM   #5
Jeepblur
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1982 CJ8 
 
Join Date: Jan 2014
Location: Raleigh, NC
Posts: 49
The spacing between the radiator and the bolt head it 1/4-1/2 inch. I'm confident it will not contact.
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Unread 09-20-2015, 04:25 PM   #6
turbogus
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1978 CJ5 
 
Join Date: Jun 2005
Location: Albany~town, Oregon, Oregon my home and for 200 billion slugs
Posts: 1,891
The fan setup on 'Black Betty' started much like this, except it was a 'pusher' fan. Something I'd consider is a fan shroud, but on some systems that one can forego.
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Unread 09-21-2015, 07:25 AM   #7
predatorbass
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Join Date: Sep 2015
Location: grand haven, mi
Posts: 54
The 2 threaded holes in the bottom is for a automatic , it is the tranny cooler.
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