Last night I did the plumbing and hooked up my Oil Pressure sender and Oil Temperature sender.

After doing so the pressure guage works just fine, but the temperature guage doesn't budge!

I "inlined" everything between the oil feed line to the Supercharger and the supercharger...functionally speaking like this:

There isn't any trick to the temp sender that I'm missing, is there? The guage has power and ground, and the signal wire runs straight from the end of the temp sender to the guage. The sender should be grounded through the SC (as the pressure sender is).

Am I missing something stupid?

I hope to post a pic later tonight...this setup is really ugly!

 

are you using the stock temp sender or are u using the autometer one?

 

There's a stock oil temperature sender? That's news to me. Regardless, I'm using the autometer one.

 

hmm are you sure the sender is grounded?

 

There's no circulation of oil in the way you hooked up the sender in the dead end there... The heat would mostly get to the sender portion thru conduction. It should move after some driving though.

 

The autometer pressure sender is working perfectly. IIRC it requires a ground as well, and would get it through the SC.

Unless the pressure sender doesn't require ground...but I'm pretty sure it does.

 

Hmm, good point. It doesn't move after 10 minutes of driving or so. Maybe I have to re-think its location.

 

since my only shallow answer was not correct.. i will now agree with chunger...

 

The temp sensor needs oil running past it.
I had a similar setup, same problem.

-ctn

 

I have my oil temperature sender in my oil drain plug. Works great in that location, but it would be nice to know the oil temp going into the blower, like you're trying to do.

I'm puzzled about why you're not getting any signal at all, though. Even though you don't have oil directly in contact with the sender, it still should be registering some temperature gain from diffusion of heat into the tee.

Back when I had an auto tranny, I had my oil temp gauge set up to measure transmission fluid coming from an external cooler. The sender teed into the rubber hoses, so I had to run a grounding wire from the sender to the engine block. You might try that just to be absolutely sure it's not a grounding issue. (For instance, if you used Teflon tape maybe you've insulated the sender from the grounding path.)

 

Well, the guage doesn't display less than 100, so I guess if "cold" oil got stuck up there, it would never really change.

If moving its location doesn't fix it, I'll try grounding it as well.

 

I had a bunch of stops to make on my way home from work today, and all in all was driving for about an hour.

The guauge showed almost 125 when I got home, so it is working, its must just be the location that's causing the problems.

What are normal temp readings?

 

Under the same circumstances as what you describe, I would probably see around 180F. Being at the bottom of the oil pan, though, my sender is measuring the temperature of oil that is cooled by air flow along the bottom of the oil pan, so I always consider that to be a low number compared to oil temperatures elsewhere in the engine.