3 different coolant temp sensors (CTS) Which one is what? - Team Camaro Tech
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post #1 of 6 (permalink) Old Sep 9th, 14, 11:43 AM Thread Starter
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guillaumeb
 
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Location: quebec
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3 different coolant temp sensors (CTS) Which one is what?

Hello!

I have a 68 Camaro Rs with a 327 engine.
The car is equipped with console gauges.

I looked online to find the right coolant temperature sensor and I see that there is 3 different sensors available... and not all sites says the same things about those sensors...

The 3 types are:
-Nail head sensor (Kind of T connector)
-Flat connector
-Pin connector... only a small pin comming out of sensor

I've read that the flat connector is made for cars without gauges ( warning lignt only)

But what is the Diffrence between the Nail connector and the pin connector?
Is the sensor the same?

I've bought a brand new engine wiring harness and it seems to be made for the pin connector but I've also read that 68 camaros should have the nail head connector...

I'm very confused!
Any help would be greatly appreciated1

Thanks a lot guys!

G.b.
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post #2 of 6 (permalink) Old Sep 9th, 14, 12:43 PM
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Dave
 
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Location: Tampa, Florida
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Re: 3 different coolant temp sensors (CTS) Which one is what?

This was being actively discussed just a few days ago.

The spade (flat connector) and the pin are designed to work with idiot lights. They sit doing nothing as the temperature rises and then switch to complete a circuit to ground. Some use a bi metal strip to make the connection others some other mechanical point that is physically moved by the increasing temperature to contact the case.

The T head uses a fluid filled case that changes it's electrical conductivity as the temperature rises to allow a volt meter to be used as a temperature gauge. The temperature change is analog on these older cars (thermistors are used with newer digital gauges on the forth and fifth generation Camaros).

Big Dave
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post #3 of 6 (permalink) Old Sep 9th, 14, 04:48 PM
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Karl
 
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Re: 3 different coolant temp sensors (CTS) Which one is what?

Quote:
Originally Posted by guillaumeber View Post
Hello!

I have a 68 Camaro Rs with a 327 engine.
The car is equipped with console gauges.


I looked online to find the right coolant temperature sensor and I see that there is 3 different sensors available... and not all sites says the same things about those sensors...

The 3 types are:
-Nail head sensor (Kind of T connector)
-Flat connector
-Pin connector... only a small pin comming out of sensor

I've read that the flat connector is made for cars without gauges ( warning lignt only)

But what is the Diffrence between the Nail connector and the pin connector?
Is the sensor the same?

I've bought a brand new engine wiring harness and it seems to be made for the pin connector but I've also read that 68 camaros should have the nail head connector...

I'm very confused!
Any help would be greatly appreciated1

Thanks a lot guys!

G.b.
The original was the push style pin as shown for 68. There are two other styles offered which are compatible with console gauges. "Mushroom" head which requires the slider connector and "threaded pin" which is a generic style that will adapt to the push style wiring connector on the green wire of the harness or provide for a nut to tighten a spade connector. Incidentally, there are "flat spade" style units which will work with gauges. The best way to distinguish between gauge and warning light types is to look and see whether the black ceramic insulator on the top of the unit protrudes about 1/2" from the brass base w/ the flat connector attached...this unit is designed specifically for "warning lights". All other units generally have the black ceramic insulator even with the brass base and are designed for use with gauges. Make sure the sending unit resistance matches the gauge specs. Hope this helps!


Karl / VetteFreak
69 Camaro RS 350/350TH...Burgundy...711-Black Int/Houndstooth Seats
2007 Corvette Conv. LS-2/A6...Monterey Red/Black Top & Int
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post #4 of 6 (permalink) Old Sep 9th, 14, 06:05 PM Thread Starter
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guillaumeb
 
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Location: quebec
Posts: 144
Re: 3 different coolant temp sensors (CTS) Which one is what?

Thanks a lot guys! that helps a bunch!

Seems like repro / jobber sensors with the push style pin are getting harder to find...

I'll look for a generic one with the threads if I can't find the push in style!

thanks again

g.b.
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post #5 of 6 (permalink) Old Sep 9th, 14, 07:04 PM
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Karl
 
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Re: 3 different coolant temp sensors (CTS) Which one is what?

Quote:
Originally Posted by guillaumeber View Post
Thanks a lot guys! that helps a bunch!

Seems like repro / jobber sensors with the push style pin are getting harder to find...

I'll look for a generic one with the threads if I can't find the push in style!

thanks again

g.b.
Rick's Camaros offers the push on style as shown above and I'm sure others like Camaro Central and NPD offer it as well.

Karl / VetteFreak
69 Camaro RS 350/350TH...Burgundy...711-Black Int/Houndstooth Seats
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post #6 of 6 (permalink) Old Sep 10th, 14, 09:40 AM Thread Starter
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guillaumeb
 
Join Date: Mar 2009
Location: quebec
Posts: 144
Re: 3 different coolant temp sensors (CTS) Which one is what?

Thanks a lot guys!

For the moment I'm using the T head modified into a flat pin... it works but the connector is a little loose... I'll probably change that sensor soon.

THanks again!

g.b.
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