What is this sensor?

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Aug 26, 2012 | 06:01 PM

jdbuddy

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From: Gainesville FL

What is this sensor?

I cannot figure out what this sensor is on my 79 with create 350. The wires have come off, but everything seems to be working. It is on the passenger side just above the starter.

Any help would be appreciated.

Aug 26, 2012 | 06:16 PM

oldalaskaman

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temp.

Aug 26, 2012 | 06:44 PM

GOLF72

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From: CORONA CA

^
That is what I woud say too.

Aug 26, 2012 | 06:48 PM

jdbuddy

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From: Gainesville FL

The temp gauge is working and there is another sending unit on the driver's side of the engine. It has a single prong and looks more like what is see for replacement temp units.

Aug 26, 2012 | 07:34 PM

oldalaskaman

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you have ....'2'.... temp senders

Aug 26, 2012 | 08:07 PM

alswagg

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From: Syracuse IN

That looks exactly like the sensor for electric fan on my 81. Exact same place also. triggered "on" at 210* off at 195*. At least that is where mine is regulated. Al

Aug 26, 2012 | 09:24 PM

KapsSA

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From: Beecher Illinois

Quote:

Originally Posted by alswagg

That looks exactly like the sensor for electric fan on my 81. Exact same place also. triggered "on" at 210* off at 195*. At least that is where mine is regulated. Al

Yep.
Was your 79 originally an L82 with air conditioning?

Aug 26, 2012 | 09:26 PM

jdbuddy

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From: Gainesville FL

yes, I still have the A/C and it is working.

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Aug 26, 2012 | 09:28 PM

jdbuddy

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From: Gainesville FL

I did remove the valve that sends coolant to the heater core (installed a manual valve like a lot of people). Did that have a temp sensor?

Aug 26, 2012 | 09:50 PM

#10

jdbuddy

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From: Gainesville FL

Is this the reminance of an electric fan on the radiator?

It just turns freely now.

Aug 26, 2012 | 09:57 PM

#11

oldalaskaman

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lesse, yup there's a fan there

Aug 26, 2012 | 10:02 PM

#12

jdbuddy

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From: Gainesville FL

That must be it - temp sensor for the electric fan that was disabled when the new engine was dropped in. Car runs cool so I am not going to worry about it.

Thanks to everyone for the help.

Aug 26, 2012 | 11:55 PM

#13

oldalaskaman

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if your engine runs hot with the ac on , you may want to check into getting that system to work, it will make your a/c blow colder.

Aug 27, 2012 | 07:44 AM

#14

Paul L

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From: Ontario

Aug 27, 2012 | 10:17 AM

#15

jdbuddy

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From: Gainesville FL

Thanks Paul, the diagram is a big help. I'll have the fan checked out to see if it still works and maybe plug the sensor back in.

Aug 27, 2012 | 10:45 AM

#16

Paul L

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From: Ontario

Quote:

Originally Posted by jdbuddy

Thanks Paul, the diagram is a big help. I'll have the fan checked out to see if it still works and maybe plug the sensor back in.

That is from the 1979 Corvette GM Factory Service Manual. I sold my 1979 in 2003 but I at one point contemplated adding one. But it does not kick in until 238*F and my L-82 never came close to that temp so I did not go to the expense. I suppose a sensor with a lower temp kick-in could be found.

Aug 27, 2012 | 01:38 PM

#17

jdbuddy

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From: Gainesville FL

Yea, I recently put in headers (short ceramic coated) and even on the highway at 4k RPM I haven't seen my temp go over 225. I don't believe I need the electric fan, but it is a option that I will keep in mind.