Which sender is for temp gauge?
Thread Starter
Melting Slicks
Joined: Dec 2000
Posts: 2,198
Likes: 2
From: Eastern Connecticut
Which sender is for temp gauge?
I have to replace my temperature sender with a smaller version to fit my new heads. The problem is there is a sender in each head and I don't know which one works the gauge. The other must be for TCS or something. I can't test it because the motor is out, the battery is out the car is on jackstands and I don't want to open the door.
So... anybody know which head gets the temperature gauge sender? I don't want to buy both.
Thanks
Joe
So... anybody know which head gets the temperature gauge sender? I don't want to buy both.
Thanks
Joe
Le Mans Master
Joined: Oct 2002
Posts: 7,098
Likes: 378
From: Las Vegas - Just stop perpetuating myths please.
U should have labeled everything when u removed it Joe.
Originally Posted by joe73vette
I have to replace my temperature sender with a smaller version to fit my new heads. The problem is there is a sender in each head and I don't know which one works the gauge. The other must be for TCS or something. I can't test it because the motor is out, the battery is out the car is on jackstands and I don't want to open the door.
So... anybody know which head gets the temperature gauge sender? I don't want to buy both.
Thanks
Joe
So... anybody know which head gets the temperature gauge sender? I don't want to buy both.
Thanks
Joe
Ok my temp sender on my '74 is on the drivers side head between #1 & #3 plugs. I plugged the hole on the p-side - just used pipe plug with thread sealer. Most the temp sensors and controls for smog equip are mounted on the intake as far as i can tell.
Why the smaller version sensor? My World Products fit/used stock everything.
Well if u really get serious and drill the hole larger remember the thread is NPT tapered pipe thread - not straight SAE. 
Hope this helps. cardo0
Pro
Joined: Apr 2004
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From: Atascadero Ca
only other place it could be is in the center of the intake manifold, next to the water neck. Usually only if you have an aftermarket intake, thats where mine is on my weiand, the hole in the heads is plugged.
Melting Slicks
Joined: Apr 2001
Posts: 2,119
Likes: 213
From: Pittsburgh PA
Originally Posted by joe73vette
I have to replace my temperature sender with a smaller version to fit my new heads. The problem is there is a sender in each head and I don't know which one works the gauge. The other must be for TCS or something. I can't test it because the motor is out, the battery is out the car is on jackstands and I don't want to open the door.
So... anybody know which head gets the temperature gauge sender? I don't want to buy both.
Thanks
Joe
So... anybody know which head gets the temperature gauge sender? I don't want to buy both.
Thanks
Joe
My 72 is between 1+3 on the driver's side. I too had to get the smaller sender due to a head change. The smaller diameter sender is the one for 1981-82. Zip part number ES-387.
Thread Starter
Melting Slicks
Joined: Dec 2000
Posts: 2,198
Likes: 2
From: Eastern Connecticut
Originally Posted by foundvettelifeisgood
Joe,
My 72 is between 1+3 on the driver's side. I too had to get the smaller sender due to a head change. The smaller diameter sender is the one for 1981-82. Zip part number ES-387.
My 72 is between 1+3 on the driver's side. I too had to get the smaller sender due to a head change. The smaller diameter sender is the one for 1981-82. Zip part number ES-387.
It's 1/4" pipe thread right?
Joe
PS, I guess Dart uses later model sensor holes in their heads.
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Melting Slicks
Joined: Apr 2001
Posts: 2,119
Likes: 213
From: Pittsburgh PA
Originally Posted by joe73vette
Thanks for the hint. I'll save it in case the NAPA guy gets stuck. He said he would look thru the book and match the resistance with what is there now, but in smaller diameter.
It's 1/4" pipe thread right?
Joe
PS, I guess Dart uses later model sensor holes in their heads.
It's 1/4" pipe thread right?
Joe
PS, I guess Dart uses later model sensor holes in their heads.
the one on the passenger side of my 79 L82 runs the electric aux radiator fan.
Thread Starter
Melting Slicks
Joined: Dec 2000
Posts: 2,198
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From: Eastern Connecticut
Well to give you guys an update, NAPA can't find a 3/8" sender with the same ohm reading as the original sender. It's an oddball range, 72-88 ohms. Most are 22-26 ohms, the 81-82 vette is around 100 ohms. So I bought a 1/2" pipe tap and I'll make the hole bigger. Now I know which hole! Joe
Le Mans Master
Joined: Oct 2002
Posts: 7,098
Likes: 378
From: Las Vegas - Just stop perpetuating myths please.
Just a heads up.
Originally Posted by joe73vette
Well to give you guys an update, NAPA can't find a 3/8" sender with the same ohm reading as the original sender. It's an oddball range, 72-88 ohms. Most are 22-26 ohms, the 81-82 vette is around 100 ohms. So I bought a 1/2" pipe tap and I'll make the hole bigger. Now I know which hole! Joe
If ur lucky that tap will have the correct drill size to use (stenciled or in the box). But u need to verify this as close isn't good enough - unless u like installing threaded inserts in a press sys.
Sorry i can't recall - heck i can't even remember the plug/sender size (but u can just measure it now). Good luck and thanks for the update.
cardo0
Melting Slicks
Joined: Apr 2001
Posts: 2,119
Likes: 213
From: Pittsburgh PA
Originally Posted by joe73vette
Well to give you guys an update, NAPA can't find a 3/8" sender with the same ohm reading as the original sender. It's an oddball range, 72-88 ohms. Most are 22-26 ohms, the 81-82 vette is around 100 ohms. So I bought a 1/2" pipe tap and I'll make the hole bigger. Now I know which hole! Joe
Thread Starter
Melting Slicks
Joined: Dec 2000
Posts: 2,198
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From: Eastern Connecticut
Well it's done. I opened the hole with the biggest drill I own (5/8) then started reaming it with the end of the tap. I used a rat-tail file to continue the taper all the way in. One hour of careful tap work later (half a turn at a time, lots of grease to catch the chips) and the stock sender fits perfectly. The threads are nice and even and I'm sure will seal with teflon. Thanks for all the advice. Joe
Joe
Melting Slicks
Joined: Nov 2001
Posts: 2,668
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From: Eastern US XX
Originally Posted by joe73vette
Well it's done. I opened the hole with the biggest drill I own (5/8) then started reaming it with the end of the tap. I used a rat-tail file to continue the taper all the way in. One hour of careful tap work later (half a turn at a time, lots of grease to catch the chips) and the stock sender fits perfectly. The threads are nice and even and I'm sure will seal with teflon. Thanks for all the advice. Joe
Joe
Melting Slicks
Joined: May 1999
Posts: 2,897
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From: Moon Township PA
Well, I see that I am late, but Lectric Limited (yes, it is the correct spelling) may have the part you are looking for.
http://www.lectriclimited.com/
The temp sender in the passenger head is for the TCS, Temperature Controlled Spark, system. Those sending units are still available but most people have disconnected them for performance reasons.
Gary
http://www.lectriclimited.com/
The temp sender in the passenger head is for the TCS, Temperature Controlled Spark, system. Those sending units are still available but most people have disconnected them for performance reasons.
Gary
Melting Slicks
Joined: Nov 2003
Posts: 2,668
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From: St. Charles Mo
CI 5 & 8 Veteran
Originally Posted by joe73vette
Well to give you guys an update, NAPA can't find a 3/8" sender with the same ohm reading as the original sender. It's an oddball range, 72-88 ohms. Most are 22-26 ohms, the 81-82 vette is around 100 ohms. So I bought a 1/2" pipe tap and I'll make the hole bigger. Now I know which hole! Joe
Bullshark
Thread Starter
Melting Slicks
Joined: Dec 2000
Posts: 2,198
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From: Eastern Connecticut
Originally Posted by Bullshark
Joe, too late now, but why didn't you consider the NAPA 3/8" sender and install a small trimpot in series to add the required resistance?