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Old 07-28-2021, 12:26 PM   #1
BeaverMeat
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Default e-fan woes

Spent just over a month doing an overhaul of the engine bay of the Volstang which included custom fitting a Ford Contour V6 rad fan assembly... Yes, it fits perfectly on a 240 Diesel rad but it's a tight fit in-front of that 5.0L.

Having some thermo switch issues and looking for suggestions.

Currently my set-up is

Volvo two-speed fan relay
Volvo "regina" 102*-97*C thermo switch for the high speed in the rad
Beck/Arnley 201-1797 97*-92*for the low speed in the T-stat housing.

The Beck/Arnley sensor is the problem. The fans kick-in way too early and they don't shut-off until the engine is really cool... around 30*C (92*F).

Apparently that sensor is for a Toyota V6 of some kind... I'm starting to think (or recently discovered) that Toyota uses a closed circuit thermo switch design where the Volvo system uses a open circuit? idk.

So, I need to find a thermo switch in the realm of ~210*F that fits a 3/8npt (or M16x1.5 for my adaptor) Is there any way to use a common ground (single post) sensor on a open ground circuit?
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Old 07-28-2021, 12:34 PM   #2
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https://www.amazon.com/88-98-Switch-...language=en_US
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Thank you very much everybody... i now feel sufficiently retarded and will go cry in the corner...
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Old 07-29-2021, 10:13 PM   #3
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Hmm.
https://www.ebay.com/itm/193351053130

I have no idea what I'm doing.

All I know is the absolute maximum temperature I want that engine to run at is 215*F
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Old 07-30-2021, 12:39 AM   #4
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I have another SAAB set like this: https://forums.turbobricks.com/showthread.php?t=359900 if you want to use it instead of the radiator switch.
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Old 07-30-2021, 03:43 AM   #5
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Originally Posted by PCH View Post
I have another SAAB set like this: https://forums.turbobricks.com/showthread.php?t=359900 if you want to use it instead of the radiator switch.
Yeah... looked at those but I decided to go with modifying the OE t-stat housing with a 3/8 NPT hole (as per standard Stang practice), I got it done for free by a local machinist who said “a 5.0 swapped Volvo, that’s cool. Bring it by when you’re done”. So... can’t argue with free
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Old 07-30-2021, 11:22 AM   #6
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You don't think the thermostat stays open longer than it should?
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Old 07-31-2021, 02:05 AM   #7
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Originally Posted by PCH View Post
You don't think the thermostat stays open longer than it should?
Well... it’s a 192*f t-stat. According to the interwebz a rad fan should turn on 10*f over the t-stat temp. I don’t know the justification of that. All I know is according to Ford optimum operating temp for. fuel injected 302 is 200-210*F with 214*f being that absolute top. After that the ECU starts to pull the timing.

I’m trying to replicate the 94-95 fan sequence with the low speed fan kicking in at around 208-210*f


Note: I think I started a thread on this already. Perhaps they should be merged. lol

Last edited by BeaverMeat; 07-31-2021 at 02:11 AM..
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Old 07-31-2021, 04:54 PM   #8
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The beck-arnley might be for the return hose after the radiator
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Old 07-31-2021, 04:58 PM   #9
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Originally Posted by mikep View Post
The beck-arnley might be for the return hose after the radiator
I looked deeper into the design of that Toyota/Lexus/Dihatsu sensor type. It'a a closed circuit, meaning the circuit breaks when the temperature is reached instead of closing the circuit like most other thermo switches.

So my mistake and I learned something.

I need a closed ground, open circuit thermo switch... I wonder if there is a way to use a common ground type?
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Old 07-31-2021, 05:04 PM   #10
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My question is: in your experience, is the E-Fan life worth it? I have a good quality Spal that I was considering putting in my NA B23F 242, and I am just not sure! I am wondering if the Spal fan pulling for normal temp and an OE AC fan pushing for when AC on/high temp wouldn't be so bad.

I know it's a beat to death topic, and usually ends up with someone shooting their eye out, but I figured I'd ask!
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Old 07-31-2021, 06:33 PM   #11
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There was no alternative... it was already e-fanned. Converting it back to a clutch type will be difficult. I have considered it. But, Have you seen a diesel rad fan shroud lately? Almost impossible to find these days.

For your application, idk. It’s worth it if you stay analog with off-the-shelf parts. I’ve read that those fancy adjustable units are hit’n’miss.

Last edited by BeaverMeat; 07-31-2021 at 06:40 PM..
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