temp sensor machining - The 1947 - Present Chevrolet & GMC Truck Message Board Network

kglowacky · 07-14-2023, 11:02 PM

Someone on this board was(is) machining the OEM temp. sensor down to fit the LS 1 head, Can't seem to find him on old threads, HELP Please.

LS short box · 07-15-2023, 05:05 PM

May be not for you but I drill and tap the head for the correct NPT size. That way if the sensor fail a new one is only a NAPA parts store away.

**A1971Blazer** · 07-16-2023, 08:34 AM

Quote:

Originally Posted by kglowacky

Someone on this board was(is) machining the OEM temp. sensor down to fit the LS 1 head, Can't seem to find him on old threads, HELP Please.

I have been modifying the original sensors to fit the later model Vortec heads but not for LS family engines.

The standard sensor has 1/2"-NPT threads, the Vortec heads are 3/8"-NPT
the LS is 12mm

There isn't enough material to modify the original sensor to 12mm (.472")
here's a cut-away of an original sensor, the small end is .550" diameter.
Name: sensor.jpg
Views: 189
Size: 21.8 KB

Name: sensor.jpg
Views: 189
Size: 21.8 KB

kglowacky · 07-16-2023, 06:15 PM

thanks, I was thinking you were doing machining for LS1 heads. My mistake.

**A1971Blazer** · 07-16-2023, 06:54 PM

Quote:

Originally Posted by kglowacky

thanks, I was thinking you were doing machining for LS1 heads. My mistake.

no worries…I wish they would work

**Accelo** · 07-22-2023, 01:39 AM

I used one of these.
https://www.amazon.com/Engine-Adapte.../dp/B015NG418C
Seems it would change the calibration because it extends out so far.
I have not had any issues with mine.
Others use the LS part and connect it to the original system.
Maybe someone can find the link as I had no luck.
Cheers

**mongocanfly** · 07-22-2023, 04:23 AM

I do what ls short box did...drill/tap pass head to npt..

Joyridin · 07-22-2023, 07:15 AM

Quote:

Originally Posted by Accelo

I used one of these.
https://www.amazon.com/Engine-Adapte.../dp/B015NG418C
Seems it would change the calibration because it extends out so far.
I have not had any issues with mine.
Others use the LS part and connect it to the original system.
Maybe someone can find the link as I had no luck.
Cheers

I had one of those on my LS3. It did not work real well. After driving for a bit, the adapter would heat up and I think the sensor was picking up that temperature instead of the coolant.

**JMac11** · 07-31-2023, 12:57 PM

I drilled and tapped water pump for correct sending unit.

07-14-2023, 11:02 PM	#1
kglowacky Registered User Join Date: Mar 2020 Location: The Woodlands,Tx Posts: 563	temp sensor machining Someone on this board was(is) machining the OEM temp. sensor down to fit the LS 1 head, Can't seem to find him on old threads, HELP Please.

07-15-2023, 05:05 PM	#2
LS short box Registered User Join Date: Jun 2015 Location: Carlos MN Posts: 1,979	Re: temp sensor machining May be not for you but I drill and tap the head for the correct NPT size. That way if the sensor fail a new one is only a NAPA parts store away.

07-16-2023, 06:15 PM	#4
kglowacky Registered User Join Date: Mar 2020 Location: The Woodlands,Tx Posts: 563	Re: temp sensor machining thanks, I was thinking you were doing machining for LS1 heads. My mistake.

07-22-2023, 01:39 AM	#6
Accelo Senior Member Join Date: Mar 2015 Location: washington Posts: 2,201	Re: temp sensor machining I used one of these. https://www.amazon.com/Engine-Adapte.../dp/B015NG418C Seems it would change the calibration because it extends out so far. I have not had any issues with mine. Others use the LS part and connect it to the original system. Maybe someone can find the link as I had no luck. Cheers

07-22-2023, 04:23 AM	#7
mongocanfly Post Whore Join Date: May 2015 Location: Alabama Posts: 14,608	Re: temp sensor machining I do what ls short box did...drill/tap pass head to npt.. __________________ Mongo...aka Greg RIP Dad RIP Jesse 1981 C30 LQ9 NV4500..http://67-72chevytrucks.com/vboard/s...d.php?t=753598 Mongos AD- LS3 TR6060...http://67-72chevytrucks.com/vboard/s...34#post8522334 Columbus..the 1957 IH 4x4...http://67-72chevytrucks.com/vboard/s...63#post8082563 2023 Chevy Z71..daily driver

07-31-2023, 12:57 PM	#9
JMac11 Registered User Join Date: May 2005 Location: Tallahassee Fl Posts: 773	Re: temp sensor machining I drilled and tapped water pump for correct sending unit.

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