with Hoosiervette.
Temp sensor question
Thread Starter
Racer
Joined: Feb 2005
Posts: 373
Likes: 1
From: Bayonne NJ
Temp sensor question
I have a temp sensor on each side of my heads.. one is a single pronge on the driver side. on the passenger side is a dual prong sensor.. any idea as to which one does what'? there is no part number that i can find for the one on the passenger side, so for now i just plugged that side and i am only running the one sensor.. i haven't started the car yet so im not to sure as to what is what.
Burning Brakes
Joined: Aug 2005
Posts: 1,126
Likes: 0
From: Hudson Falls, N.Y. 76 Vette Modified L-48
Originally Posted by BanGnGearS
I have a temp sensor on each side of my heads.. one is a single pronge on the driver side. on the passenger side is a dual prong sensor.. any idea as to which one does what'? there is no part number that i can find for the one on the passenger side, so for now i just plugged that side and i am only running the one sensor.. i haven't started the car yet so im not to sure as to what is what.
Burning Brakes
Joined: May 2005
Posts: 945
Likes: 23
From: Uniondale IN
St. Jude Donor '14-'15-'16
The one on the drivers side is for your temp. guage. I believe the one on the passenger side is for an optional electric cooling fan. I'm not sure but this is what I have been told. I also plugged the one on the passenger side.
Burning Brakes
Joined: Aug 2004
Posts: 971
Likes: 7
From: roanoke va
On my 72 the one on the drivers side is for temp. gauge and the one on on the pass side is for the tcs system.
The tcs system is designed to limt the timeing untill the engine temp. is hot and the trans. is in high gear. Most of these system have been disconected by now.
The tcs system is designed to limt the timeing untill the engine temp. is hot and the trans. is in high gear. Most of these system have been disconected by now.
Thread Starter
Racer
Joined: Feb 2005
Posts: 373
Likes: 1
From: Bayonne NJ
Originally Posted by hoosiervette
The one on the drivers side is for your temp. guage. I believe the one on the passenger side is for an optional electric cooling fan. I'm not sure but this is what I have been told. I also plugged the one on the passenger side.
I have a 79 L-82.. that is the only thing that i can think of.. i do have a electric fan, but i also have the clutch fan with it.. idk.. its not not the oil pressure guage, that is on the driver side as well and i believe looks much different.
Thread Starter
Racer
Joined: Feb 2005
Posts: 373
Likes: 1
From: Bayonne NJ
I can't use the original sensor that i have because the dart heads that i installed have a smaller diameter fitting for the sensor.. I want to switch to using electric fans tho, so if i call dart to try to get a part number for this switch, could i run my aftermarket fans off of that sensor? Also do you know what temp this sensor activates the fan to turn on? This was a dealer option correct?
Le Mans Master
Joined: Mar 2004
Posts: 7,424
Likes: 1,458
From: Little Rock AR
I have an '80 L-82 and yes, that passenger side sensor is for the auxilliary cooling fan. I also did the Dart head swap and found the sensor holes were set up for smaller fittings.
The solution for me was to hog out the hole and run a proper sized tapered pipe tap down in there. You can open it up to the tap hole size (from a pipe tap drill chart) with a die grinder, small straight carbide cutter, and a steady hand (work SLOWLY). I would not trust a drill bit in a hand drill personaly. You do not need to remove much metal at all. You are very close once the original threads are gone. Tap the holes and clean out the chips. It worked for me.
Or just pay a competent machine shop to do it.
-Mark.
The solution for me was to hog out the hole and run a proper sized tapered pipe tap down in there. You can open it up to the tap hole size (from a pipe tap drill chart) with a die grinder, small straight carbide cutter, and a steady hand (work SLOWLY). I would not trust a drill bit in a hand drill personaly. You do not need to remove much metal at all. You are very close once the original threads are gone. Tap the holes and clean out the chips. It worked for me.
Or just pay a competent machine shop to do it.
-Mark.
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Melting Slicks
Joined: Aug 2003
Posts: 2,135
Likes: 2
From: Dayton Oh
Originally Posted by BanGnGearS
I can't use the original sensor that i have because the dart heads that i installed have a smaller diameter fitting for the sensor.. I want to switch to using electric fans tho, so if i call dart to try to get a part number for this switch, could i run my aftermarket fans off of that sensor? Also do you know what temp this sensor activates the fan to turn on? This was a dealer option correct?
Thread Starter
Racer
Joined: Feb 2005
Posts: 373
Likes: 1
From: Bayonne NJ
Ok. i got the reducer that i needed.. seems like a long way to get an accurate reading.. im thinking about using this switch to activate 2 electrical fans and eliminate the clutch fan.. any thoughts?
Burning Brakes
Joined: Aug 2002
Posts: 1,146
Likes: 10
From: Scottsboro Alabama
Originally Posted by BanGnGearS
Ok. i got the reducer that i needed.. seems like a long way to get an accurate reading.. im thinking about using this switch to activate 2 electrical fans and eliminate the clutch fan.. any thoughts?
You don't need a reducer. You need a 3/8" thread temp sensor. Several companies make them with different temp settings. It's nothing more than a on-off switch. For instance, on at 195- off at 175. It has no relationship with the sensor that operates your temperature gauge. I have dual spals using two sensors, one in a head controlling one fan, the other in the intake controlling the other fan. Both sensors are from the same manufactorer...on at 195 off at 175. I also have remote 5mm leds mounted in my dash allowing me to moniter when the fans are operating. Works pretty good. The spal controller operates differently but wasn't what I was looking for.
