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Old 01-06-2017, 10:33 AM   #1
A1971Blazer
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Temperature sensor modification

I had offered to try and modify a sender from 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
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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....?
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Old 01-06-2017, 10:41 AM   #2
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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...
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Old 01-06-2017, 01:23 PM   #3
truckster
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Re: Temperature sensor modification

What would the cost for something like that be?
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Old 01-06-2017, 01:37 PM   #4
A1971Blazer
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Re: Temperature sensor modification

$10.00 for the modification plus return shipping if you furnish the sensor or I can purchase the sensor to save you the two way shipping cost.....just add the cost of the sensor...about $20.00 for the sensor....total would be about $30.00 some change...

For LS motor..... I will have to pull one to see what the metric thread size is...the standard sensor..ACDelco G1852...is NPT....it has to be turned down to .675 to thread 3/8 NPT....I don't know how much smaller it can go..? The stem end is .550 diameter...
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Old 01-06-2017, 03:01 PM   #5
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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..
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Old 01-06-2017, 03:04 PM   #6
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Re: Temperature sensor modification

Quote:
Originally Posted by mongocanfly View Post
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..
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...
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Old 01-08-2017, 08:43 PM   #7
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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.
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Old 03-08-2017, 11:23 PM   #8
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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.
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Old 03-09-2017, 08:13 AM   #9
A1971Blazer
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Re: Temperature sensor modification

Quote:
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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.
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...
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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.....
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Old 03-09-2017, 12:43 PM   #10
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Re: Temperature sensor modification

That looks really good. I'm sending you a PM.
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Old 10-15-2017, 04:01 PM   #11
Mike (Asheville)
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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.
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Old 10-15-2017, 11:13 PM   #12
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Re: Temperature sensor modification

Saving for later.......
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Old 10-16-2017, 10:38 PM   #13
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Re: Temperature sensor modification

I got mine from Whit. Nice guy and beautiful work.
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Old 10-18-2017, 07:39 AM   #14
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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...
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Old 11-04-2017, 05:02 PM   #15
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Re: Temperature sensor modification

I would be interested in one of these. Need the sending unit.
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Old 11-13-2017, 10:27 AM   #16
A1971Blazer
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Re: Temperature sensor modification

Quote:
Originally Posted by min View Post
I would be interested in one of these. Need the sending unit.
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!
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Old Yesterday, 04:16 PM   #17
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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

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