Temp sender. 1/8 ntp ?

morgan · Post by **morgan** » Tue May 09, 17 4:26 pm

umm... going to debug my lazy temp guage (doesnt bother getting out of bed under normal service. Gets up to 1/2 if I sit in traffic for a bit, but then slumps back to near bottom.

Will a generic 1/8 ntp item just fit or is there anything funky about them ? (440).

Thought it was the easiest thing to try before pulling the dash and behind bulkhead wiring about. Rad and stat all new and that didnt fix it. (although thinking about it might be dash wiring earth as fuel guage lazy too...)

Anyway - 1/8ntp ?

Blue · Post by **Blue** » Tue May 09, 17 6:32 pm

The sender needs to be the correct ohm rating to match the gauge. It might be there is some kind of standard that all the manufacturers use, but If fuel gauge senders are anything to go by I doubt it. Hopefully someone that has tried a non Mopar specific part will know for sure.

RobTwin · Post by **RobTwin** » Tue May 09, 17 9:30 pm

Dunno.... but all I do know is it's NPT (National Pipe Thread), not NTP

Blue · Post by **Blue** » Tue May 09, 17 10:04 pm

It's National Pipe Taper actually but we won't split hairs

kma176 · Post by **kma176** » Wed May 10, 17 8:32 am

Ahh but that is only a shortened term - its full name is :-
"American National Standard Taper Pipe Thread"

kma176 · Post by **kma176** » Wed May 10, 17 8:32 am

morgan · Post by **morgan** » Wed May 10, 17 9:42 am

Blue wrote:The sender needs to be the correct ohm rating to match the gauge. It might be there is some kind of standard that all the manufacturers use, but If fuel gauge senders are anything to go by I doubt it. Hopefully someone that has tried a non Mopar specific part will know for sure.

Useful. Thanks Blue.

RobTwin wrote:Dunno.... but all I do know is it's NPT (National Pipe Thread), not NTP read2

Less so. Smart arse.

db · Post by db » Wed May 10, 17 10:14 am

I'll be buying one today from my local old-school motor factors.
They're cheap enough so I'll take a chance. I reckon I'll soon know if it's compatible.

freighdog · Post by **freighdog** » Thu May 11, 17 11:30 am

If you have an multimeter handy you can measure the ohm rating.

Connect one lead of your multimeter to the terminal on top of the sender and the other to a good ground. Measure ohms when the engine is cold and again after warmed up. This will give you an idea of which replacement to get.

If the gauge in the car is working, the sender is probably fine. I have a similar problem whereby my gauge sits just below the 'normal' range. My problem is an overly efficient rad and a low temp thermostat. Cardboard in front of the radiator has fixed my problem for now. ðŸ˜

Ps. If you're not ofay with npt thread types, it's worth having a read up about sizes. And if you need any enormous npt thread adapters, just let me know! Doh!