After Market Temp/Oil Gauges??? (Sending Units)

JLS

Well-known member
Jul 8, 2004
253
0
Hot Sulphur Springs, CO
I just came across a nifty way to add senders to our engine and thought I should ask the PRO's to see what you all think. Will this work or is it a lame way to do it??? Is the Oil temparture a good temp reading or would you do the water temp?
 

jasonmk12

Well-known member
Jul 8, 2005
328
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40
Portland, OR
Im interested in this as well. It states "Allows you to add up 4 1/8"-27 NPTF threaded sensors." How much are the sensors?

Jason k :victory:
 

R_Lefebvre

Well-known member
Dec 10, 2007
942
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Looks like the temp it is reading might be influenced by the engine block temperature since there is so much metal area for heat transfer into the sensor.

I have a somewhat similar arrangement on my Focus tring to measure air temperature. I have a sensor screwed into the metal air intake piping. Unfortunately it does a better job of measuring the tube temperature than the air temperature running through it. When the car isn't moving, you can watch the temps climb to 200F which obviously is not the air temperature.

I'd worry about a similar effect here, not displaying an accurate temperature. In this case, oil temp is usually higher than the coolant temp. If the sensor temperature were being dragged down through cooling of that plate via the engine block cooling, you could be led to a false sense of security.

I'd prefer an oil temp sensor right in the pan instead. Or in a hose.
 

gmookher

Well-known member
Oct 30, 2004
5,201
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Grand Canyon State
R_Lefebvre said:
Looks like the temp it is reading might be influenced by the engine block temperature since there is so much metal area for heat transfer into the sensor.

I have a somewhat similar arrangement on my Focus tring to measure air temperature. I have a sensor screwed into the metal air intake piping. Unfortunately it does a better job of measuring the tube temperature than the air temperature running through it. When the car isn't moving, you can watch the temps climb to 200F which obviously is not the air temperature.

I'd worry about a similar effect here, not displaying an accurate temperature. In this case, oil temp is usually higher than the coolant temp. If the sensor temperature were being dragged down through cooling of that plate via the engine block cooling, you could be led to a false sense of security.

I'd prefer an oil temp sensor right in the pan instead. Or in a hose.

VERY good points, maybe mounting the sensor a little ways away even in a dead end hose would be more accurate reading albeit a slower reacting reading
 

R_Lefebvre

Well-known member
Dec 10, 2007
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Dead end hose wouldn't work so well.

Do the Discos have oil cooling? I have no idea. If they do, put a sensor in line with the hot hose. I got a machined adaptor for my coolant temp. Wouldn't be hard to do for oil.
 

R_Lefebvre

Well-known member
Dec 10, 2007
942
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I think so, but probably not necessary. Changes are there is another way to get pressure. There's often a factory oil pressure sensor threaded into the block somewhere. Find it, remove it, install a machined brass Tee fitting, thread the factory sender back into that, then your aftermarket sender into the other branch. Done. $5.

Sometimes engines even have threaded holes with plugs installed in them just waiting to be used. Just have to find them.
 

KDamericano

Well-known member
Oct 16, 2006
193
0
Denver, CO
The Oil pressure switch is just above the oil filter. I'm assuming that's what you'd need?

From RAVE:

Oil pressure switch
The oil pressure warning light switch registers low oil pressure in the main oil gallery on the outflow side of the filter.
Whilst the engine is running and oil pressure is correct, the switch is open. When the ignition is switched on or if oil
pressure drops below the pressure setting of the switch, the switch closes and the low oil pressure warning lamp
located in the instrument pack will illuminate.
 

R_Lefebvre

Well-known member
Dec 10, 2007
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Woah, good=open? That's not exactly failsafe! So if the wiring fails, the light stays off no matter what the oil pressure does.

Who designed that?
 

JLS

Well-known member
Jul 8, 2004
253
0
Hot Sulphur Springs, CO
R_Lefebvre said:
Woah, good=open? That's not exactly failsafe! So if the wiring fails, the light stays off no matter what the oil pressure does.

Who designed that?

Exactley why I want an actual pressure guge (analog) to let me know where I am at. That oil filter adapter seems the easiest way to go about it if you ask me. The original temp sender is hard to get at...
 

robertf

Well-known member
Jan 22, 2006
4,795
364
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R_Lefebvre said:
Woah, good=open? That's not exactly failsafe! So if the wiring fails, the light stays off no matter what the oil pressure does.

Who designed that?

yeah, its great. They never have to service faulty sending units :D

I kept mine since the rear window defrost is disabled if there is no oil pressure sending unit, and added a T in the oil cooler line for an aftermarket gauge.
 

R_Lefebvre

Well-known member
Dec 10, 2007
942
0
Just... Wow... No wonder they have so many problems with engineering like that!

And this is linked to the rear defrost how? Please tell me that's a cruel joke.
 

bishop13

Well-known member
Oct 31, 2005
239
0
Burbank
Sorry to dig this thread up, but I'm in the process of exploring options on hooking up my gauges and was wondering if the OP (or any others) have used the adapter.

Thanks!
 

CandiMan

Well-known member
Apr 9, 2008
425
0
Charlotte, NC
www.cardomain.com
This adaptor plate (I think it's called a "sandwich" adaptor plate) is very common in the after-market tuning industry. I've used it on my Nissan. The reason I used it was for an auxillary oil cooler.

http://inlinethumb11.webshots.com/1994/1012824409028469772S600x600Q85.jpg

http://inlinethumb34.webshots.com/43169/1012824479028469772S600x600Q85.jpg

Some in the racing community wll argue which is more accurate in determining the engne temp, coolant or oil. If I ever build a race engine, I'll make sure to install both. Can't go wrong with too much engine info.
 
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antichrist

Well-known member
Sep 7, 2004
8,208
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68
Atlanta, GA
R_Lefebvre said:
Woah, good=open? That's not exactly failsafe! So if the wiring fails, the light stays off no matter what the oil pressure does.
That's a risk for any warning light. If the the wiring fails, it can cause the light to not work.