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04-27-2018, 08:47 AM | #1 |
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Join Date: May 2015
Location: Cedar Rapids, IA
Posts: 155
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305E Temp Switch Location for Electric Fan?
Running an electric fan on my truck and previous owner had it controlled solely through a toggle switch in the cab. I would like to incorporate an on/off (180deg.) sensor of some type but am not sure where I can locate it since the 2 ports on the manifold are already taken up by the factory temp sensor and a hose fitting for the heater. Any other options? I have looked into the "probe" style that slide between radiator fins but for some reason I feel as though this wouldn't be near as effective as a sensor with the bulb immersed in the actual coolant.
Any words of wisdom?
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'66 GMC K25 (305 V6, SM420) aka "Mabel" Link to project http://67-72chevytrucks.com/vboard/s...d.php?t=698082 All gone - '66 CJ5, '69 C25, '69 C25 Camper Special, '79 C10 Big Ten/Bonanza, '84 K10 Silverado |
04-27-2018, 10:11 AM | #2 |
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Join Date: Sep 2002
Location: Alamogordo, NM
Posts: 692
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Re: 305E Temp Switch Location for Electric Fan?
Would a typical SBC/BBC thermostat housing with a temp fitting fit a V6?
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04-27-2018, 10:36 AM | #3 |
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Join Date: Aug 2011
Location: China Spring, TX
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Re: 305E Temp Switch Location for Electric Fan?
Do V-6's use a fan shroud or was that removed for "better" cooling.
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Master Chief, US Navy, Retired 1964 C10 Step-side Short Bed - In Progress 2009 2500HD Duramax LTZ 1948 GMC Panel 1956 Big Window Stepside 1953 5 Window Chevy Stepside 1932 Coupe New Seat Foam for Bench Seats? |
04-27-2018, 11:05 PM | #4 |
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Join Date: Feb 2011
Location: Corona, CA
Posts: 1,826
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Re: 305E Temp Switch Location for Electric Fan?
I thought a thermostat housing that has the NPT on it like this one would work. I know that the Pontiac 400 housing (1975 and above) will fit, but I could not locate one that had the NPT.
I also found this by-pass for 1.5" hose on EBay. https://www.ebay.com/itm/Billet-Inli...NZcmeu&vxp=mtr
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MusicMan70 1961 GMC Suburban |
04-27-2018, 11:12 PM | #5 |
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Join Date: Oct 2016
Location: san bernardino ca
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Re: 305E Temp Switch Location for Electric Fan?
You can put it in the head. If it has a spot for it.
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04-28-2018, 05:21 PM | #6 |
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Join Date: Apr 2017
Location: Bozeman
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Re: 305E Temp Switch Location for Electric Fan?
I researched this subject recently and...according to all the experts lol, the best place is in the hot side of the radiator as close to incoming fluid. So if your a cool kid, you weld a bung at said location or you use the drain spigot if that's on the right side or you can use a section of pipe in line with hose. This is a highly debatable subject on line with many different opinions lol. I called all the fan people, deralle and speak and the like and as you guessed got different opinions lol. General consensus is away from engine ambient heat as best as possible and as close to the coolant to be cooled as far away from ambient heat is better. Most new school aluminum radiators have the port on them. Just as a disclaimer I know Jack shi@ and just blindly trust most big name manufactures recommendations. Now google- thermostats temp and fan temp and see just how all over the place it is lol. This forum is much more civilized than others and that's nice. Glad I sold my 5 window coupe lol!
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04-30-2018, 01:24 PM | #7 | |
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Join Date: May 2015
Location: Cedar Rapids, IA
Posts: 155
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Re: 305E Temp Switch Location for Electric Fan?
Quote:
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'66 GMC K25 (305 V6, SM420) aka "Mabel" Link to project http://67-72chevytrucks.com/vboard/s...d.php?t=698082 All gone - '66 CJ5, '69 C25, '69 C25 Camper Special, '79 C10 Big Ten/Bonanza, '84 K10 Silverado |
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