REPLACING ELECTRIC FANS.
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Elder User
Joined: Dec 2006
Posts: 881
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From: Sudbury, ONT.
Great info, thanks!
I had another idea, I'd temporarily unhook the thermoswitch and wire the fans to a manual switch. I'll turn the fans on myself, around 195-200, and then turn them off around 170. The fans should have no trouble accomplishing that. Then, I'd eventually upgrade to the higher temp (195-175) thermoswitch, or maybe even an adjustable temp switch. The weather is finally getting above freezing during the days now, so the snow is leaving. Won't be long till cruising season is here!
I had another idea, I'd temporarily unhook the thermoswitch and wire the fans to a manual switch. I'll turn the fans on myself, around 195-200, and then turn them off around 170. The fans should have no trouble accomplishing that. Then, I'd eventually upgrade to the higher temp (195-175) thermoswitch, or maybe even an adjustable temp switch. The weather is finally getting above freezing during the days now, so the snow is leaving. Won't be long till cruising season is here!
Lead Driver
Joined: Apr 2011
Posts: 6,399
Likes: 40
From: El Dorado, Arkansas
Great info, thanks!
I had another idea, I'd temporarily unhook the thermoswitch and wire the fans to a manual switch. I'll turn the fans on myself, around 195-200, and then turn them off around 170. The fans should have no trouble accomplishing that. Then, I'd eventually upgrade to the higher temp (195-175) thermoswitch, or maybe even an adjustable temp switch. The weather is finally getting above freezing during the days now, so the snow is leaving. Won't be long till cruising season is here!
I had another idea, I'd temporarily unhook the thermoswitch and wire the fans to a manual switch. I'll turn the fans on myself, around 195-200, and then turn them off around 170. The fans should have no trouble accomplishing that. Then, I'd eventually upgrade to the higher temp (195-175) thermoswitch, or maybe even an adjustable temp switch. The weather is finally getting above freezing during the days now, so the snow is leaving. Won't be long till cruising season is here!
Hotshot
Joined: Mar 2013
Posts: 14,255
Likes: 199
From: Phoenix, Az.
If you were to do that I'd suggest wiring the manual switch to just one fan. This way if you shut off the fan and traffic or whatever draws your attention, at least one will still work. Put the switch in line to the fan that IS NOT above the radiator's lower hose nipple.
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Elder User
Joined: Dec 2006
Posts: 881
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From: Sudbury, ONT.
I took the fans back out and used foam tape to seal up all the edges that would be against the rad. This way, the fans must pull the air through the rad instead of around the edges of the fan housings. It took some doin' to get it back into the truck. The whole assembly had to go up from the bottom, the crank and water pump pulleys had to come off, the truck fought me a couple times.....Have you ever had one of those conversations with your truck that goes like this, "Listen you piece of ****, I'm trying to help you here. Why are you fighting me? This is going to make you better, why you gotta be such a bit** sometimes......"
Anyways, after getting it all hooked up, I let the truck run with the thermoswitch wire intentionally unhooked, to keep the fans from starting too soon. I let the truck warm up to 200, and then I grounded the wire and started the fans. Same as before, within two minutes, the temp was down to 170, and dropping. So, I think I'll go ahead and order the 195-175 thermoswitch.
Thread Starter
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Elder User
Joined: Dec 2006
Posts: 881
Likes: 1
From: Sudbury, ONT.
If you were to do that I'd suggest wiring the manual switch to just one fan. This way if you shut off the fan and traffic or whatever draws your attention, at least one will still work. Put the switch in line to the fan that IS NOT above the radiator's lower hose nipple.
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Elder User
Joined: Dec 2006
Posts: 881
Likes: 1
From: Sudbury, ONT.
SPOKE TO SOON ABOUT SPRING...
Spring played a very mean April Fool's joke on us up here. We were teased with a week or more of warm weather that was melting the snow, just to wake up this morning to a fresh 4" of snow on the ground. Good thing I haven't put my sled away yet.....
Hotshot
Joined: Mar 2013
Posts: 14,255
Likes: 199
From: Phoenix, Az.
I agree, I'm going to leave both fans hooked up to a thermoswitch so they both come on when needed. I like to think that I'd always have an eye on the gauge but you never know. That and if my wife happens to be driving, I know she won't be watching anything but the road in front of her.
Years ago I had that 5.0L 83 Mustang GT ground pounder I've mentioned on this forum before. One day my girlfriend at the time wanted to borrow it to go back and forth to work. It was a Saturday so I wasn't working that day. Well, I had put a pair of Hayden fans on it that were temperamental at keeping it cool. Especially with the A/C on. I told her to watch the temp gauge for this reason. She obviously did just what you mentioned Merc. Hours later I heard what sounded like a train whistle outside From INSIDE our apartment. I walked out to see what the heck it was. It was my radiator/cap!!!! Thank God she didn't tie up the engine. But she hurt the rings. It was never as powerful as it was before that. I was more torqued than a diesel cylinder head.
Lead Driver
Joined: Apr 2011
Posts: 6,399
Likes: 40
From: El Dorado, Arkansas
I agree, I'm going to leave both fans hooked up to a thermoswitch so they both come on when needed. I like to think that I'd always have an eye on the gauge but you never know. That and if my wife happens to be driving, I know she won't be watching anything but the road in front of her.
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Elder User
Joined: Dec 2006
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From: Sudbury, ONT.
TESTING MY NEW THERMO-SWITCH
My wife works Saturdays, so I figured today would be perfect to test my new 195(on)-175(off) thermo-switch that arrived yesterday. You can see my set-up that I put together on the kitchen stove.
I turned the burner on and stood poised with my "point-n-shoot" thermometer gun. When I saw my ohm meter go to "open" I yanked the switch out of the water and checked the temp of the probe, it was 199. Then, I shut the burner off and put the switch back in the water to let it cool slowly. When my ohm meter went back to "closed" I pulled the switch back out and checked the temp again, it was 172.
Then my wife got home and saw my tools and parts all over her kitchen counter and stove.....so now I'm banished to the garage for a few hours. Good time to install my new thermo-switch!
Hotshot
Joined: Mar 2013
Posts: 14,255
Likes: 199
From: Phoenix, Az.
My wife works Saturdays, so I figured today would be perfect to test my new 195(on)-175(off) thermo-switch that arrived yesterday. You can see my set-up that I put together on the kitchen stove.
I turned the burner on and stood poised with my "point-n-shoot" thermometer gun. When I saw my ohm meter go to "open" I yanked the switch out of the water and checked the temp of the probe, it was 199. Then, I shut the burner off and put the switch back in the water to let it cool slowly. When my ohm meter went back to "closed" I pulled the switch back out and checked the temp again, it was 172.
Then my wife got home and saw my tools and parts all over her kitchen counter and stove.....so now I'm banished to the garage for a few hours. Good time to install my new thermo-switch!
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