| FAQ |
| Members List |
| Social Groups |
| Calendar |
| Search |
| Today's Posts |
|
#1
03-16-2026, 04:29 PM
|
||||
|
||||
Temp Sending Unit
More newbie questions about my 1968 Sprint. It appears that I have two temperature sending units but I don't understand why? One is on the water neck and the other in the block on the opposite side. I did not trace the wires to see where they go.
|
|
#2
03-16-2026, 05:29 PM
|
||||
|
||||
|
The one in the second picture is the stock location on the head, not the block, I have never seen one mounted on the thermostat outlet before, interesting. I suspect you have a gauge and an idiot light hooked up. Not a bad thing in my opinion. I have modified the thermostat housing with a nipple to send warm coolant warm a base plate I had made that bolted to the bottom of the intake manifold, where the exhaust manifold normally attaches. I did this on an engine with headers, and it helped with cold weather operations. I used to drive my cars until snow actually fell, so if the temps were below freezing, it would help the engine run and idle better after the engine warmed up.
__________________
Jeff R 60 Jaguar Mark 2, 3.8L Automatic 67 Sprint Firebird 230 OHC-6 4-Speed A/C 1971 Fiat 130 Coupe 3.2L SOHC V6, ZF 5-speed 78 Catlina Safari, Pontiac 400 powered 77 Astre Formula, 215 Buick V-8 T-5 73 Lemans Safari, 400 4bbl 4-speed 71 Catalina Enforcer, 455 4bbl 05 Dodge Magnum 3.5L SOHC V6 06 Mallet Solstice #024 LS2, Now with a Tremec 6060 6-speed! 2012 F-150 Echo Boost (My local Ford Dealer SUX!!!) 2020 Dodge Charger Scat pack (recovered) |
|
#3
03-16-2026, 05:35 PM
|
|||
|
|||
|
I could be wrong on this. The connection on your water neck looks like the one I had that was situated just to the side of my water neck on my intake and went to my dash cluster. The other one looks similar (not exact same) to a second temperature sending unit when I added an AutoMeter gauge. I wonder if your car had a second gauge at some point. Chasing that wire would be worth it.
|
|
#4
03-16-2026, 07:20 PM
|
||||
|
||||
|
Looks like an old Chevy Water Neck
__________________
When I die, I want to go peacefully like my grandfather did, in his sleep. Not screaming like the passengers in his car. 
|
|
#5
03-21-2026, 06:36 PM
|
||||
|
||||
|
I do have a gauge (inop) and just realized I do not have a functioning idiot light either. Time to chase wires. I like the idea of both but the thermostat housing is unattractive. I have a stock unit and may rely on the gauge alone.
|
| Reply |
|
|
The PY Online Forums is the largest online gathering of Pontiac enthusiasts anywhere in the world. Founded in 1991, it was also the first online forum for people to gather and talk about their Pontiacs. Since then, it has become the mecca of Pontiac technical data and knowledge that no other place can surpass.
Linear Mode
