Hey guys I need some help!

[Rokcrln]

Yep I need a hand figuring out what H2o temp sender to use in LowBuck.
You see I want to use the stock dash gauge but the stock sending unit is like a 1/2 NPT and my 92 LT1 only has a 3/8NPT spot in the head. I have already re-wired the fire wall bulk head and hooked the wire up to a sender I had found but it reads way off. The parts store can't tell me what Ohms the gauge or sender is stock so I have no way of finding a cross over sender for my application. Does any one have a part number for the correct sender but in a 3/8NPT size?

Tell you what the first person who can give me the right part number that works corectly I will send out a set of ether cab dolly or cab lift plans for your help!

Kevin
LFD Inc.

[killer71]

Sounds like a ? for 68 short step...maybe he'll chime in!

[68 short step]

use your stock temp sensor (for the carbed engine) and use a 3/8npt to 1/2npt adaptor....that make sense???

[Rokcrln]

Originally Posted by 68 short step

use your stock temp sensor (for the carbed engine) and use a 3/8npt to 1/2npt adaptor....that make sense???

yeh I tried that but the adapter was too long with the sender to fit with my headers. Do you know of a short adapter?

Kevin
LFD Inc.

[68 short step]

get me some pics please.....
or refer me to one of the million pages of "low buck"

[Rokcrln]

Originally Posted by 68 short step

get me some pics please.....

My parts store only had a two part adapter to get it from 3/8npt to the 1/2npt. Is it 1/2npt or am I off on the stock one?

Any links to the adapter you are thinking of?

Thanks
Kevin
LFD Inc.

[PanelDeland]

Use a 3/8 ths to 1/2 inch street 90* ell.it should give you enough room.Just a suggestion but it looks like it would fit.At least it might get you going until you find something that would look better.

[Rokcrln]

Originally Posted by PanelDeland

Use a 3/8 ths to 1/2 inch street 90* ell.it should give you enough room.Just a suggestion but it looks like it would fit.At least it might get you going until you find something that would look better.

The only ones I have seen are not deep enough on the 1/2" side to recieve the sender with out bottoming out. Is their a special one for sending units?
I would rather not us an adapter due to looks but if it my only choice I would do it.

I will also concider the lath trick if I can find someone with the right die for 3/8npt.

As for tapping my head, nope not that brave

Kevin
LFD Inc.

[Fastfun]

Have you tried using a 1/2 to 3/8 bushing instead of the adaptor. They also make a face bushing that looks like a helicoil that should give you the clearance

[Rokcrln]

Originally Posted by Fastfun

Have you tried using a 1/2 to 3/8 bushing instead of the adaptor. They also make a face bushing that looks like a helicoil that should give you the clearance

I wish it was that easy but my head has the femal 3/8npt and the stock sender has the male 1/2npt. This is why the local parts store adapter was so long because he had to put a few together in order to get it to step up. If it had to step down then it would be nice and short..

Kevin
LFD Inc.

[Fastfun]

Originally Posted by Rokcrln

I wish it was that easy but my head has the femal 3/8npt and the stock sender has the male 1/2npt. This is why the local parts store adapter was so long because he had to put a few together in order to get it to step up. If it had to step down then it would be nice and short..

Kevin
LFD Inc.

I just reread your post and that will not work. You are going from 3/8 to 1/2

[Bob 68327]

Someone please help I have the same trouble with my Dart heads !!

[clay68c10]

If you have the room, and feel brave, you could tap out the hole in your head to the bigger size. I've done it on intakes before, and if you're careful it works/seals fine.
Someone offered a few of the stock 67-72 senders turned down on a lathe and re-threaded about a year ago on the parts board. I don't remember who that was though.

[corn]

Wasnt it Green Machine that had some specially made & was selling a few here a while back? May want to send him a PM & ask...

[john]

Check this out.

http://67-72chevytrucks.com/vboard/s...ht=temp+sender

[corn]

Originally Posted by john

Check this out.

http://67-72chevytrucks.com/vboard/s...ht=temp+sender

Good goin' John! I was on the right track. Green Machine bought a couple from Eroc. I was at Green Machines house & we talked about his, thats all I could remember...

[Rokcrln]

Originally Posted by drman929

I did some digging today at work and came up with something maybe kind of close. These are Carquest part numbers.
The TS6 is the factory 1/2" sending unit. These are its specs--
Closes at 100F at 368 ohms at 32 tolerance
Opens at 220F at 80 ohms at 125 tolerance
The closest ohm match I could find in a 3/8" sending unit was a TS225.
Closes at 100F at 239 ohms at 10 tolerance
Opens at 220F at 28 ohms at 6 tolerance

I have no idea what the tolerance means, but this is the closest sending unit I could find as far as ohms are concerned. I looked at a picture, and this is a compact sending unit that would work well there...if it would read halfway decent. It was used only on Fords, but I forgot to write down what applications. The part number should interchange...

Maybe it will work?

I will check it out and see how it goes.

Originally Posted by john

Check this out.

http://67-72chevytrucks.com/vboard/s...ht=temp+sender

I PM'd him to see if he is still making them or has any left.

Thanks to all for the help as I have been driving LowBuck on a daily basis and have done over 5k miles in the last few months and it runs great but it is always in the back of my mind "What If".

I will let you all know what come out of this.

Kevin
LFD Inc.

[ERASER5]

There is a lot of brass meat on the temp sender. I believe you can turn the 1/2" id to 3/8" and pipe thread it 3/8NPT.

There is a post somewhere in the monster pile of archives of this being done by another member.

[Rokcrln]

Originally Posted by ERASER5

There is a lot of brass meat on the temp sender. I believe you can turn the 1/2" id to 3/8" and pipe thread it 3/8NPT.

There is a post somewhere in the monster pile of archives of this being done by another member.

Yep John posted the link to it tonight. I dont have a lath so I PM the guy who was doing them.

Kevin
LFD Inc.

[wibilly]

not sure of the specs but i just built a late 50's y block[292 v8 ford] that took a very short 3/8 sending unit

[Rokcrln]

Originally Posted by wibilly

not sure of the specs but i just built a late 50's y block[292 v8 ford] that took a very short 3/8 sending unit

So what are you putting the Y block into? I have a 51 F1 with a merc flatr head in it right now but will replace it with a cobra 4.6 DOHC motor for my son (or that is what I am telling the wife as he is only 9mo)

Kevin
LFD Inc.

[low'n slow]

Kevin, I'm sure we got the temp sender for my 94 lt1 from NAPA. I'll look around and see if I can find the invoice. It has been 2 years since then, so don't hold yur breath.

[Rokcrln]

Well we did some more checking today and found that the ones listed above would still be way off for my gauge reading. I had called a freind of mine yesterday to ask him about it and I guess it bugged him that he did not have an answer so he made this. He took a hydro fitting and an NPT coupler and silver soldered them together. He may have to do another one that is a bit longer because this one lets the sender bottom out just before it gets tight. I will try a few things on Sunday to see how it goes.




Kevin
LFD Inc.

[corn]

Ah shoot, I thought you didnt have room for an adaptor...

[Rokcrln]

Originally Posted by corn

Ah shoot, I thought you didnt have room for an adaptor...

It's not in yet but I have not seen one this short being sold anywere. If you know of one let me know because my sender bottoms out in this one just before being tight. So I tried to champher the end of the sender to allow it to tighten up only to find out their is a spring in the end of the sending unit

Back to the drawing board. Still waiting for the PM< to be returned from the guy who used to turn these down!

Kevin
LFD Inc.