Water Temp Sending Unit Thread Size?

1989LXFOX

Active Member

Jan 19, 2018

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Jan 19, 2018

#1

• Jan 19, 2018

• #1

Hello all,

I will be installing a glowshift water temp gauge on my 1989 LX 5.0. I want to directly replace the stock sender with the unit supplied by Glowshift. My question is.. What size is thread is on the stock port? The glowshift sender has a 1/8" - 27 NPT. I am not sure what size the stock is and if I have to buy a thread adapter.
Also, being a total noob, I ran the tach wire through the rubber steering boot, can I do the same with the wires for the oil pressure, water temp and vacuum wires? I am not sure where I should drill through firewall and kind of afraid to also!

Thanks!

 

Mustang5L5

That is…until I whipped out my Bissell

Mod Dude

Feb 18, 2001

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Jan 19, 2018

#2

• Jan 19, 2018

• #2

3/8" npt

There's a plug in the lower intake manifold at the drivers side rear. This can be removed and the temp sensor wiring extended to reach. That's if you don't want a dead stock guage in the cluster. It will read cooler here however

 

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1989LXFOX

Active Member

Jan 19, 2018

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Jan 19, 2018

#3

• Jan 19, 2018

• #3

Mustang5L5 said:

3/8" npt

There's a plug in the lower intake manifold at the drivers side rear. This can be removed and the temp sensor wiring extended to reach. That's if you don't want a dead stock guage in the cluster. It will read cooler here however

Click to expand...

Than

Mustang5L5 said:

3/8" npt

There's a plug in the lower intake manifold at the drivers side rear. This can be removed and the temp sensor wiring extended to reach. That's if you don't want a dead stock guage in the cluster. It will read cooler here however

Click to expand...

Thanks for the reply! So the stock npt size is 3/8? I don’t care about the stock gauge going dead but thanks for the tip man!

 

Mustang5L5

That is…until I whipped out my Bissell

Mod Dude

Feb 18, 2001

43,176

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Massachusetts

Jan 19, 2018

#4

• Jan 19, 2018

• #4

Both these locations and two on the rear are 3/8 npt

 

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1989LXFOX

Active Member

Jan 19, 2018

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Jan 19, 2018

#5

• Jan 19, 2018

• #5

Thanks!

 

monte87

Founding Member

Feb 26, 2001

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new york

Feb 23, 2018

#6

• Feb 23, 2018

• #6

stock thead size in lower mani is 3/8 NPT.
Hope this helps, Anthony

 

mikestang63

SN Certified Technician

Aug 27, 2012

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Feb 24, 2018

#7

• Feb 24, 2018

• #7

dont use the rear passenger ports as they will throw off the reading. Either use the stock location by the distributor or use a thermostat housing with a threaded opening for the sensor.

 

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BlakeusMaximus

Still got to try a little lube on my speedo head

5 Year Member

Jul 12, 2017

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Feb 24, 2018

#8

• Feb 24, 2018

• #8

1989LXFOX said:

Hello all,

I will be installing a glowshift water temp gauge on my 1989 LX 5.0. I want to directly replace the stock sender with the unit supplied by Glowshift. My question is.. What size is thread is on the stock port? The glowshift sender has a 1/8" - 27 NPT. I am not sure what size the stock is and if I have to buy a thread adapter.
Also, being a total noob, I ran the tach wire through the rubber steering boot, can I do the same with the wires for the oil pressure, water temp and vacuum wires? I am not sure where I should drill through firewall and kind of afraid to also!

Thanks!

Click to expand...

Just don’t overtighen the sender, you’ll crack the lower intake!

 

Reactions: monte87