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Old 08-12-2002, 11:54 PM   #1
imprezzakc
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Member#: 22462
Join Date: Aug 2002
Chapter/Region: SWIC
Location: Phoenix , Az
Vehicle:
2001 AutoFozzyFTW
SilvernBlack

Default oil pressure sending unit

has anyone installed an autometer oil pressure guage ? If so where and how did you get the sending unit installed ?
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Old 08-13-2002, 12:08 AM   #2
EvasionOfTruth
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2007 FXT
WRB SPB Edition

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I have yet to install mine. To lazy to try to get the adapter. A thread of interest on this topic. http://forums.nasioc.com/forums/show...t=oil+pressure

Search is amazing

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Old 08-13-2002, 12:19 AM   #3
imprezzakc
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I just found out that a local friend of mine already installed the oil pressure sending unit with a brass adapter he got at home depot. I will find out what he used and post as soon as I find out..
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Old 06-18-2003, 05:23 PM   #4
Shinji N
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Well?
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Old 08-07-2003, 03:45 PM   #5
Porkchop-WRX
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I need the same answer I bought the oil gallery plug but the threading is different. I was thinking of re threading it.
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Old 08-07-2003, 09:22 PM   #6
goobie
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Quote:
I need the same answer I bought the oil gallery plug but the threading is different. I was thinking of re threading it.
You could just drill and tap the stock plug with a 1/8 NPT tap. I did a simlar thing with my plug but I had a 1/4 to 1/8 NPT adapter lying around so I drilled and tapped the stock secondary oil gallery plug with a 1/4 NPT and installed the adapter, then the 1/8 sender (or in my case the line. I have a mech gauge). It will be a little tricky to tighten after being tapped though beacuse you no longer have the hex head on the plug. I just partially drilled two small holes in the on the edge of the top of the plug and used a hammer and center punch on an angle to tighten. No leaks no problems! Make sure to use teflon tape on all your threads!

The threaded oil gallery plug that Subaru offers is threaded 1/8 BSPT. Which is about 1/2 a thread off from 1/8 NPT after about 3 or 4 turns. You can get away with threading the 1/8 NPT sender into the 1/8 BSPT plug but you'll have to put lots of teflon tape, close your eyes say, say a prayer and tighen that sucker on there until it feels nice and tight. Just don't plan on removing it and reusing it in the future! I wouldn't recommend the above but it can get you by in a pinch.

I would suggest one of the following:
1. Tap the stock plug as described above.
2. Get the Subaru threaded plug and 1/8 BSPT to 1/8 NPT adaptor

I guess you could retap the Subaru threaded plug to NPT but I would think you would need to go to 1/4 and get a 1/4 to 1/8 like I had. There probably won't be enough material to retap the 1/8 BSPT to 1/8 NPT with out totally screwing up the plug about 3-4 threads down.

Good luck!

Chad
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Old 03-25-2014, 12:36 PM   #7
fatsingleguy
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i just installed autometer gauges in my 08 2.5. i tapped the threads in the fitting for the factory oil pressure switch and had to run a line to the new sender that i mounted on the passenger side strut tower. only problem i'm having is incorrect readings. i don't have any leaks anywhere but i'm getting air pockets in the line causing my gauge to read low. tried bleeding the line but when the engine is off, oil drains back into the block creating more air pockets.
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