1967 corvette temp sender

[Timothy B.]

I picked up a AC temp sender at Carlisle that has the AC Made in USA right side up and just a little bit smaller. I want to know if this is OK to use on my 67 Corvette as the original has AC upside down.

At room temperature FWIW, the ohms are about 75 less than the original and the original always left the guage at 160+- with a 180 thermostat so I may try this one.

[Joe R.]

Re: 1967 corvette temp sender

The sending unit should read approx. +-10ohms

75 ohms at 210degrees
105 ohms at 180degrees

Suspend it in a pot of boiling water and check the ohms.

JR

[Wayne M.]

Re: 1967 corvette temp sender

I picked up a AC temp sender at Carlisle that has the AC Made in USA right side up and just a little bit smaller. I want to know if this is OK to use on my 67 Corvette as the original has AC upside down. ....

Just curious -- does your original or the Carlisle unit have a star at the start and end of the script ? Do you know anything about the upside-down script senders ?

[Timothy B.]

Re: 1967 corvette temp sender

I will double check on the star but I believe both have the star. The sender with the right side up script has smaller letters than the original. I will take some pics and post later today or tomorrow.

Tell me about the upside side down senders...

[Chris E.]

Re: 1967 corvette temp sender

I've got the same deal. The one I took off my 67 is upside down, and the repop I bought is right side up.

[Ken A.]

Re: 1967 corvette temp sender

There is a repop that is made with upside down lettering.

[Chris E.]

Re: 1967 corvette temp sender

There is a repop that is made with upside down lettering.

Who sells it, how much?

[Timothy B.]

Re: 1967 corvette temp sender

Shows what I know, I had no idea there is a repro with the AC printing. Maybe I bought a repro, I will post some pics tomorrow.

[Joe R.]

Re: 1967 corvette temp sender

There is a repop that is made with upside down lettering.

Ken,

And just where can we get this rare and wonderful repo?

JR

[Timothy B.]

Re: 1967 corvette temp sender

Here are pictures of original and Carlisle senders. Is the car supposed to have upside down wording or either way is OK... Does this sender with right side up wording look like a repro?? It looked like it had been glassbeaded so I cleaned it with some brasso.

The sender with upside down wording came off the car and I have no reason to believe it's not original, there are no stars on this sender just what looks like a dimple.

PS--The mess under my finger nail is orange paint not last nights pasta sauce..

[Joe R.]

Re: 1967 corvette temp sender

Neither of those are repos.

Looks like the real deal to me.


JR

PS. That don't mean they work. What were the values when you checked them?

[Ken A.]

Re: 1967 corvette temp sender

Ken,

And just where can we get this rare and wonderful repo?

JR

I think a fellow called Joe Ray sells them. Ken

[John D.]

Re: 1967 corvette temp sender

Tim, I have found that the TSU's with the smaller lettering are the service replacements and they tend to be way off the scale. Now JR knows more about this than I do but I have seen Tung Sol senders read about the same specs as the smaller lettering ones AC ones. I've always wondered if those SR's were just restamped with AC logos.
You proved this yourself when you said the ohms reading was way too low on the one with the smaller script, etc.
JD

[Chris E.]

Re: 1967 corvette temp sender

Tim, I have found that the TSU's with the smaller lettering are the service replacements and they tend to be way off the scale. Now JR knows more about this than I do but I have seen Tung Sol senders read about the same specs as the smaller lettering ones AC ones. I've always wondered if those SR's were just restamped with AC logos.
You proved this yourself when you said the ohms reading was way too low on the one with the smaller script, etc.
JD

The guy that is helping me with the restoration had an interesting comment the other day that I think it appropriate here.

He said that when he reached out to a gauge restoration place, that they asked for him to SEND THE TEMP SENDING UNIT along with the cluster. That way, he'd calibrate the gauge and the sending unit as a system. This was the first time he'd heard anything like that...... food for thought.

[Timothy B.]

Re: 1967 corvette temp sender

Thanks for all the comments. I have the original with wording upside down, that the guage read cold (approx 160) and ohms at room temp approx 825.

The small letter AC, Carlisle bought, that reads approx 70-100 ohms less at room temp.

A third wells TS-6 unit that always ran the guage hot but that was on my 63 and it ohms out at approx 650 room temp. The small letter may be in the middle and bring the guage in closer to actual temp with a 180 thermostat.

Now I have read Jack H's article and understand room temp does not mean much. I would like to know if I try the small letter unit is it typical to see right side wording on a Corvette. I find it hard to believe upside down wording is typical for a Corvette so I thought I would ask.

Joe Ray, I am going to put these in some H2O later today, test and report back.. I just don't feel like installing then having to remove because of wording.