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Old 08-11-2010, 12:16 PM   #1
dman918
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Default Oil pressure sender unit - which spot's best?

I have a 2006 STI and have a prosport oil pressure gauge I need to hook up. I do have a galley plug if I need it, but I was wondering what the best method is for me to hook this up?

Should I:

A. Go under the alternator
B. Go under the intercooler (requires a relocation kit, correct?)
C. Get a sandwich adapter (I have a Perrin EL header so it should fit?)

Thanks for your help. I'd prefer not to buy more stuff if I don't have to, but I also have a limited set of tools to work on the car.

Mike
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Old 08-11-2010, 12:36 PM   #2
subaru3169
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i think sammich adapters are prone to leak from what i've read

i think it might have been on scoobymods that had a pdf on the A & B locations.. i think from the factory, one was specifically for the oil pressure and one was for the oil temp.. i don't remember which is which though
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Old 08-11-2010, 01:05 PM   #3
dman918
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Thanks for the reply. I know that the stock oil pressure light is connected under the alternator, but I am not sure if that is a good move (just because it's an extra protection in case my gauge ever went out). Also, is it an easier place to get to as compared to under the intercooler?
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Old 08-11-2010, 01:09 PM   #4
KillerBMotorsport
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Go with the OEM location, it's the idea spot since it's before splits to other galleys. Set your gauge to the OEM minimum for the alarm/light and if it fails, fix it
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Old 08-11-2010, 01:21 PM   #5
dman918
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If I do go in that location, is there anything special needed for install? Galley plug, tools? Is it fairly straightforward (with room to fit the prosport fuel pressure sensor)?
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Old 08-11-2010, 02:02 PM   #6
El Guapo
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oil galley under the intercooler. just need to get a plug for the sender unit and spin it on with a crows foot wrench

http://forums.nasioc.com/forums/show...77&postcount=1
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Old 01-09-2011, 04:03 PM   #7
93V
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what did you end up doing for the sensor? OEM location?

if you swap oil pressure sensors, does it throw a warning light on your dash?
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Old 01-09-2011, 04:24 PM   #8
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Quote:
Originally Posted by 93V View Post
what did you end up doing for the sensor? OEM location?

if you swap oil pressure sensors, does it throw a warning light on your dash?
The switch is ground activated so once you disconnect it the light will never come on, and no codes

If you use a gauge, just make sure to set the minimum pressure alarm/light. I recommend 14psi for OEM block/builds.
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Old 01-09-2011, 05:19 PM   #9
wrxl98
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The factory oil pressure sending unit can easily be retained by using a tee fitting at the end of a relocation line and extending the factory sensor wire.

I saw in another thread that the factory sensor doesn't activate 'till oil pressure drops to 2 psi. not sure if that is true or not.
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Old 01-09-2011, 05:48 PM   #10
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2.1 psi to be exact.

If you have a gauge with a light/buzzer there's no point in making a T and keeping the OEM gauge. That just adds another point for failure, leaks, etc.
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Old 01-09-2011, 09:13 PM   #11
93V
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awesome, thanks. will be using a Defi Racer gauge...so no warning lights but i will keep an eye on it (hence i am getting a gauge to do so).

would the T-fitting situation work? would there be enough room?

thanks again
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Old 01-09-2011, 11:18 PM   #12
subaru3169
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if anyone wants an oem oil pressure sender unit, i've got one lying around jic
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Old 01-10-2011, 12:29 AM   #13
KillerBMotorsport
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I did not know those had no light/buzzer
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Old 01-10-2011, 03:23 PM   #14
93V
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Not really a big deal. I bought the gauges so I could pay attention to them...

Another question for you KillerB: If I just unscrew the sensor, it will throw the warning light on the dash? If so, where can I disconnect the electrical harness so that I don't get that. Ideally I would just like to swap sensors and leave the stock one there, but I can completely remove the stock one if I need to in order to keep the light off.

Thanks again,

Chris
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Old 01-10-2011, 03:44 PM   #15
KillerBMotorsport
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Good point.

If you unscrew and remove the sensor the light will NOT come on. Most people leave the connector dangling or tuck it away in case they want to go back to stock in the future.
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Old 01-10-2011, 04:03 PM   #16
93V
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Ok. Still need to clarify haha.

Action 1: Unscrew NPT sensor from block

Action 2: Unplug electrical harness/connection? Where is this?

Or are you saying I only need to perform Action 1 and I can leave the NPT sensor dangling nearby?
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Old 01-10-2011, 04:08 PM   #17
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Do #1, then unplug the sensor from the wire (it's just a single wire). Put sensor with the rest of your unused Suby stuff and tuck the now un-used connector out of sight.
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Old 01-10-2011, 04:10 PM   #18
93V
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Quote:
Originally Posted by KillerBMotorsport View Post
Do #1, then unplug the sensor from the wire (it's just a single wire). Put sensor with the rest of your unused Suby stuff and tuck the now un-used connector out of sight.
ohhhh...there is an electrical connection RIGHT ON the pressure sensor...now I follow. as long as I don't have to cut anything such that it is permanent, i'll do it.
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Old 01-10-2011, 04:45 PM   #19
KillerBMotorsport
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No cutting, just unplugging
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Old 01-13-2011, 08:26 AM   #20
93V
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did this yesterday. had to temporarily disconnect the alternator but overall it was fairly easy. i used a socket to remove the stock sensor and was able to use an open-end wrench to tighten the new one. hardest part was getting the alternator back in haha.

thanks!
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Old 02-15-2011, 08:06 PM   #21
Supraru
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Recently bought the prosport 60mm gauges. Boost/egt/and oil pressure. Went to install last night and for one the sender seemed a little tight going into the stock location so I decided against doing it. Moved onto the boost gauge and realized id didn't really seem like there was enough wire to reach my defi gauge pod. Anyone have to lengthen their wires to be able to run to a defi gauge pod? Not really a huge deal just thought since that is one of the biggest locations for gauges in subaru's they would have wires long enough to reach. Advance auto didn't have that thin of wire to get some last minute so I bagged the whole project. haha
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