Water Temp Sender
Thread Starter
Instructor
Joined: Jul 2012
Posts: 186
Likes: 6
From: Lebanon Junction KY
Water Temp Sender
I have done a search for this but all the threads are old. I was wondering if there is any new information available.
73 with aluminum heads. The original temp sender is 1/2NPT, the hole in the new head is 3/8NPT. I bought a sender that I was told would work, not so says I.
I can't drill the head now that the engine is in the car and running.
Is there a 3/8NPT sender that will run the gauge in the 73?
I could adapt it but it will move it out of the coolant flow. I can't put it in the intake because that hole is used by the sender for the fuel injection.
I suppose turning the old sender down to 3/8NPT is a possibility but I was hoping there was a sender that would just screw in available by now.
Thanks in advance
Mark Potter
73 with aluminum heads. The original temp sender is 1/2NPT, the hole in the new head is 3/8NPT. I bought a sender that I was told would work, not so says I.
I can't drill the head now that the engine is in the car and running.
Is there a 3/8NPT sender that will run the gauge in the 73?
I could adapt it but it will move it out of the coolant flow. I can't put it in the intake because that hole is used by the sender for the fuel injection.
I suppose turning the old sender down to 3/8NPT is a possibility but I was hoping there was a sender that would just screw in available by now.
Thanks in advance
Mark Potter
Le Mans Master
Joined: Dec 2007
Posts: 6,422
Likes: 591
From: McHenry Illinois
I believe Willcox was offering a turned down sender awhile back. However they, Willcox, has a system to calibrate your sender and gauge to read correctly.
https://willcoxcorvette.com/catalogs...23&q=3%2F8+npt
https://willcoxcorvette.com/corvette...resistor-68-76
https://willcoxcorvette.com/catalogs...23&q=3%2F8+npt
https://willcoxcorvette.com/corvette...resistor-68-76
Last edited by '75; Jul 5, 2017 at 04:36 PM.
Le Mans Master
Joined: Apr 2011
Posts: 6,284
Likes: 1,171
From: Hermosa
Is the hole in the top of the water pump unused? It's too big but can be adapted to fit your 1/2" NPT .
Either that or a different thermostat housing with the NPT hole in it. Like one of these.
https://www.summitracing.com/parts/r...FdO1wAodlIEBjw
http://www.partstrain.com/store/deta...FUe2wAodx1QJ6g
Either that or a different thermostat housing with the NPT hole in it. Like one of these.
https://www.summitracing.com/parts/r...FdO1wAodlIEBjw
http://www.partstrain.com/store/deta...FUe2wAodx1QJ6g
Racer
Joined: Aug 2013
Posts: 339
Likes: 54
From: Fayetteville NC
Had the same issue with my 72. I ended up using a port on my intake. I have a mini thermometer gauge installed on top of my water pump to check double check temps compared to my dash gauge. So far they're pretty close.
Thread Starter
Instructor
Joined: Jul 2012
Posts: 186
Likes: 6
From: Lebanon Junction KY
I did confirm that Wilcox has turned down senders. I have to call back this morning to see if they have one in stock, they are just about 30 min from me so I am hoping to drive over and pick one up this morning.
Intermediate
Joined: Nov 2013
Posts: 26
Likes: 0
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