Temperature sensor modification
 

I had offered to try and modify a sender from ½ NPT to ⅜ NPT for a member but he never followed thru...last week I got a PM from another member wanting to try one.

He sent me this one ACDelco....... G1852
Attachment 1607624

I re-machined it on one of my CNC lathes...it looks like it will work just fine...
sending it back for install....we'll see....?
Attachment 1607625

Re: Temperature sensor modification
 

That's purty..that's a great idea..you should do some of these with metric threads to fit the LS heads..should be a fair demand for those...would beat drilling and tapping the head...

Re: Temperature sensor modification
 

What would the cost for something like that be?

Re: Temperature sensor modification
 

The hole size in the ls head is 12x1.25...that would be to small to mod the sensor...it would have to be 12mm (.472) major od with 10.466mm (.412) minor od..

Re: Temperature sensor modification
 

I'll see if I have an old one to cut apart so I can find out exactly how much material it has in that area...you're correct....M12 X 1.25 would cut it down pretty small...

Re: Temperature sensor modification
 

I've seen other threads about folks doing this in the past. Great to see someone doing it again. I've found 2 VDO sensors that are very close to stock (electrically) in 1/8" NPT and come with a 3/8" donut adapter that works fairly well (there's an old thread on here about it). But nothing beats the stock sensors when paired up with the stock gauges. I'll definitely keep this in mind if I want to swap back to a stock sensor. This is clearly the best option.

Re: Temperature sensor modification
 

A1971Blazer,

Have you heard back on the install? I'm getting ready to put my Vortec together. I noticed that your threads look a lot nicer than the factory threads, so I imagine it was a good fit. Any concern with weakening the brass, or is there enough meat there that it's not a concern?

By the way, do you live up by the Cherokee National Forest? I have family that lives just the other side of the mountains, between Blowing Rock and Lenoir, NC. It's definitely what I would call God's country.

Re: Temperature sensor modification
 

Truckster.....as a matter of fact I got a PM this morning from the member that I did that first one for.....he finally got it installed and said it worked just fine.....
There is enough material on the sensor for the 3/8 NPT.......but that's the limit.
I cut an old one apart to verify...
Attachment 1630417

I live near the Cherokee NF but I live on the Tennessee side.....about 30 minutes from the infamous "Tail of the Dragon" highway 129 through Deals Gap into North Carolina.

If you want one modified...I'd be happy to do it.....

Re: Temperature sensor modification
 

That looks really good. I'm sending you a PM.

Re: Temperature sensor modification
 

I can attest both to Whit's excellent work and the functionality of that Delco part.

It's so nice to know the temp again.

Re: Temperature sensor modification
 

Saving for later.......

Re: Temperature sensor modification
 

I got mine from Whit. Nice guy and beautiful work.

Re: Temperature sensor modification
 

Thanks for the kind words guys....this modification is easy for me to do...I'm happy to help fellow members to solve the dilemma of getting the temp gauge working properly..
For me......I like for everything to work like it should...

Re: Temperature sensor modification
 

I would be interested in one of these. Need the sending unit.

Re: Temperature sensor modification
 

I have 4 on order right now...they are AC Delco #G1852
the price will be $39.00 for the sensor, modified to 3/8 NPT....and shipped to you...
PM me if you want to reserve one of them....thanks!

Re: Temperature sensor modification
 

OK....I got them and modded for the ⅜-NPT....
2 are spoken for already.....(PM sent)...will ship as soon as paypal payment is received...thanks!
2 more available for immediate shipping

Attachment 1708198

Re: Temperature sensor modification
 

I will take both of the senders you have left. Send me a PM with your PayPal info and I will send payment. Thanks.

Re: Temperature sensor modification
 

All 4 shipped today....you should see them Friday or Saturday...thanks again
Anyone else interested....let me know.....I'll get some more going

Re: Temperature sensor modification
 

I'm still doing these for anyone needing a modified sensor....it's not a money maker for me.......just a favor for members...

Re: Temperature sensor modification
 

are these for SBC Vortec heads in a 67-72? Are they the same for BBC Vortec heads?

Re: Temperature sensor modification
 

I've been doing these primarily for guys that are running Vortec heads on small blocks....and want to make the factory temp gauge read correctly

There were several lengthy discussions about trying to find a sensor that would fit and read the correct temperature.....

I discovered that once upon a time, there was a member that was doing the modification, but for some reason, is no longer doing so.
That's when I offered to do them...

As for it fitting the BBC Vortec heads....I can't give you a definite answer.
What is the engine designation number/code and year...I can probably find out..

Re: Temperature sensor modification
 

If I'm not mistaken all GM engines from the mid '80 and up have 3/8" NPT for the temp senders in the heads.

Re: Temperature sensor modification
 

As for it fitting the BBC Vortec heads....I can't give you a definite answer.
What is the engine designation number/code and year...I can probably find out..

I will get this info too u hopefully within a few days. Thx!!

Re: Temperature sensor modification
 

I'll take one if you are still making them?

Thanks.

Re: Temperature sensor modification
 

I have 10 of them ready to ship....I will PM you the info...thanks