Fluidyne radiator
Thread Starter
Joined: Jul 2005
Posts: 86
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From: Columbia, Maryland
Fluidyne radiator
Hi folks.
I've upgraded to a fluidyne radiator (used - thanks Fong!) and I've been shopping around for a thermoswitch so I can control the fan automatically instead of using my switch.
I was poking around in the bay today and noticed what appears to be a temp sensor at the bottom of the radiator. My questions are:
1) Is it actually a temp sensor? If so, what's the likelihood if it switching under 200 degrees?
and
2) What is plugging into it? As far as I know, the stock radiator doesn't have anything that those would plug into.
(S4 NA)
I've upgraded to a fluidyne radiator (used - thanks Fong!) and I've been shopping around for a thermoswitch so I can control the fan automatically instead of using my switch.
I was poking around in the bay today and noticed what appears to be a temp sensor at the bottom of the radiator. My questions are:
1) Is it actually a temp sensor? If so, what's the likelihood if it switching under 200 degrees?
and
2) What is plugging into it? As far as I know, the stock radiator doesn't have anything that those would plug into.
(S4 NA)
The stock S4 rad does have a sensor in that location but I have no idea what it's for (S5 owner).
There's no need to guess if you want to use that location for a fan trigger though, as aftermarket triggers come in a range of temps/thread pitches and you could probably find what you want.
However, that's not really an ideal spot for a trigger as it's basically "post" rad, the water has already been cooled by the time it gets there.
You'd have to know what the temp in that location is relative to the engine temp to pick the right trigger.
There's no need to guess if you want to use that location for a fan trigger though, as aftermarket triggers come in a range of temps/thread pitches and you could probably find what you want.
However, that's not really an ideal spot for a trigger as it's basically "post" rad, the water has already been cooled by the time it gets there.
You'd have to know what the temp in that location is relative to the engine temp to pick the right trigger.
Thread Starter
Joined: Jul 2005
Posts: 86
Likes: 0
From: Columbia, Maryland
I suppose I'd get like a 185 degree one then, but I'm not sure where to buy these things.
Not that the car ever really gets that hot. Just when I'm sitting and deliberately don't turn the fan on does it even get up to operating temp. Awesome radiator is awesome.
Not that the car ever really gets that hot. Just when I'm sitting and deliberately don't turn the fan on does it even get up to operating temp. Awesome radiator is awesome.
Joined: Oct 2003
Posts: 1,600
Likes: 49
From: Norcal/Bay Area, CA
^If that's how your car runs, you have a broken or missing thermostat. Or you believe your stock S5 gauge is linear. Which it is not.
S4 Water temp switch. Not to be confused with the Water Thermo Switch on the thermostat housing. It influences fuel mixture and is supposed to switch around 60-65deg Farenheit, so it's a poor choice and location for a fan control.
S4 Water temp switch. Not to be confused with the Water Thermo Switch on the thermostat housing. It influences fuel mixture and is supposed to switch around 60-65deg Farenheit, so it's a poor choice and location for a fan control.
Thread Starter
Joined: Jul 2005
Posts: 86
Likes: 0
From: Columbia, Maryland
^If that's how your car runs, you have a broken or missing thermostat. Or you believe your stock S5 gauge is linear. Which it is not.
S4 Water temp switch. Not to be confused with the Water Thermo Switch on the thermostat housing. It influences fuel mixture and is supposed to switch around 60-65deg Farenheit, so it's a poor choice and location for a fan control.
S4 Water temp switch. Not to be confused with the Water Thermo Switch on the thermostat housing. It influences fuel mixture and is supposed to switch around 60-65deg Farenheit, so it's a poor choice and location for a fan control.
Also - I just replaced the thermostat with an OEM one not long before upgrading the radiator. =\
Thread Starter
Joined: Jul 2005
Posts: 86
Likes: 0
From: Columbia, Maryland
I found SUM-890017 from summit point. Can anyone tell me if this part will fit? I'm not sure what the threading is.
Summit Racing SUM-890017 - Summit Racing® Electric Fan Thermostat Sending Units - Overview - SummitRacing.com
Summit Racing SUM-890017 - Summit Racing® Electric Fan Thermostat Sending Units - Overview - SummitRacing.com
Joined: Sep 2005
Posts: 25,581
Likes: 136
From: Smiths Falls.(near Ottawa!.Mapquest IT!)
you can get an s4 TII thermo neck that has the sensor in it.Take that one out,out yours in and rock.
You can always put it in your upper rad hose too.
Here: this is a pic of my engine that shows BOTH locations.
You can always put it in your upper rad hose too.
Here: this is a pic of my engine that shows BOTH locations.
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