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Old 12-31-2004, 05:01 PM   #1
gotawd
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Default gauge installation

I just bought a blitz oil pressure gauge and i was just curious on the installation. It just came with the screw on sensor and i was just curious if you have to get a T fitting and go into a line or what. I saw on the blitz instructions that they have a blitz adapter kit or something but i figured id ask on here for the easiest way and where to put the sensor. thanks
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Old 12-31-2004, 05:39 PM   #2
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A good place is the blind plug located on the top side of the engine block, slightly visible when looking into the engine bay, nestled below the intercooler, turbo, and throttle cable; on the passenger side.

Chances are, you can make do with the oem Subaru oil galley plug replacement which comes pre-threaded for a BSPT type thread. My guess is the Japanese brands use the BSPT (instead of NPT for brands like Autometer), but I might be wrong about your Blitz pressure sender's thread type.

I would recommend getting the oil galley plug first, and see if the threads match that of the Blitz'. The part number for the galley plug is: 11024AA210 , with the corresponding washer: 037018200
If the sender doesn't thread in easily, then chances are you'll need a BSPT-to-NPT adapter.
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Old 12-31-2004, 08:28 PM   #3
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That galley plug is where I just installed mine (Defi). I used the sensor relocation kit from wrxtra.com. It looked like such a tight fit to get a sensor in there, I thought it would be easier with the relocation kit. Not sure if it was necesary, but it's installed now. My only complaint with the kit is that the braided hose is rather abrasive and comes in very close contact (if not direct contact) with some rubber hoses. I ended up putting a plastic shield over it (praying it doesn't melt).

http://www.wrxtra.com/cat_3.html
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Old 12-31-2004, 08:48 PM   #4
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so if the threads are the same then just plug thats there and replace it with the one that blitz sent me?? also to get the the plug do i have to take off the turbo and everything....i read somewhere thats theres a line or a plug right under the alternator that some people have used to install a oil pressure gauge. i dont konw if you have to put some type of T in there or what is it.
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Old 12-31-2004, 09:05 PM   #5
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You do not need to remove the turbo to get to the plug under the intercooler. You do need to remove the intercooler though. The plug by the alternator is the one used by the stock low oil pressure warning light, so if you decide to put your sensor there you will need a T (or Y or whatever other letters make sense ) type connector if you want to keep your dash warning light functional.

BTW, I doubt the sensor will fit directly into the galley hole, as the galley hole is relatively large. You will most likely need to pick up some adapter.
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Old 12-31-2004, 09:08 PM   #6
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BTW, some folks also opt to go the filter sandwich adapter route. Such as one like this (but other folks make them as well, Greddy for instance).

http://www.wrxtra.com/cat_7.html
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Old 12-31-2004, 10:08 PM   #7
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Quote:
Originally Posted by gotawd
so if the threads are the same then just plug thats there and replace it with the one that blitz sent me??
Quote:
Originally Posted by root
BTW, I doubt the sensor will fit directly into the galley hole, as the galley hole is relatively large.
gotawd, if your question is due to my reply in post #2, then what I meant was chances are the threads on the Blitz-supplied pressure sender might be compatible with the inner thread of the replacement oil galley plug (whose number I supplied in my earlier post). As root mentioned, the Blitz' sender thread diameter is probably too small to fit directly into the opening for the oil galley plug replacement.
Quote:
Originally Posted by root
You do not need to remove the turbo to get to the plug under the intercooler. You do need to remove the intercooler though.
Many people remove the intercooler, because it helps installation. However, if you have an extensive array of tools, it may be possible to remove the blind plug and install the replacement galley plug without removing the intercooler. It would still be very difficult imho. Whatever difficulties arise due to removal and reinstallation of the intercooler is nothing compared to trying to do this with the intercooler as is.
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Old 01-01-2005, 01:08 PM   #8
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Quote:
Originally Posted by satrya
Whatever difficulties arise due to removal and reinstallation of the intercooler is nothing compared to trying to do this with the intercooler as is.
Sage words. I was almost going to write that it "might" be possible to install without removing the intercooler, but I sure as heck wouldn't have wanted to fight it that way. And, I had the intercooler off anyway since I was running a couple wires through the firewall plug behind the intercooler.
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Old 01-01-2005, 02:40 PM   #9
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from the price i see from the sandwich adapter($80) i believe ill opt out of doing it that way.i still dont quite understand the blind plug and the sensor they sent with me. If i do it with the plug under then intercooler do i need to get an adapter or anything? i just had my intercooler off yesterday doing IC hoses so thats not a problem im just not sure on the sensor and if i need an adapter and if so where to order. thanks
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Old 01-01-2005, 05:47 PM   #10
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First thing you need to do is figure out what the threads are on the sensor. It should be printed in the manual somewhere. The Defi gauges use 1/8 NPT. Then decide where you want to plug in the sensor (e.g. galley plug under intercooler, galley plug near alternator, or sandwich adapter). Figure out what the threads are on that. Are they the same as the sensor? If yes, great. If not, you will need an adapter of some kind.

I'm sure you will need something, at the very least the Subaru galley plug mentioned by satrya above, which is apparently threaded for BSPT. You can get NPT threaded ones from wrxtra if that is what your sensor needs.

BTW, if you go the galley route and don't opt for a relocation kit, make sure the sensor physically has enough room at the location. I've heard some sensor are just a bit to big to fit directly because of surrounding hoses, etc.
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Old 01-02-2005, 12:20 PM   #11
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well the egt gauge says 1/8 PT but it didnt say on the pressure gauge but i assume its the same thread. i dont know what the gallery plug is but thats why im posting on here to let you guys tell me that part. So using that thread whats next???
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Old 01-02-2005, 12:33 PM   #12
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If it is 1/8 PT, then you can buy the galley plug (block adapter as they call it) from wrxtra that is threaded for 1/8 PT. I posted the link above, but I'll do it again just for fun.

http://www.wrxtra.com/cat_3.html
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Old 01-02-2005, 12:44 PM   #13
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Quote:
Originally Posted by gotawd
i dont know what the gallery plug is but thats why im posting on here to let you guys tell me that part. So using that thread whats next???
The galley plug is a plug that is located on top of the engine block, as I previously stated. If you go to www.wrxtra.com , you'll find some very helpful installation documents that are downloadable. It has pictures showing where the galley plug is, as well as procedures for removing the intercooler.

There is a blind plug already located there. What that means is that it is simply a plug that closes a threaded hole in that location. You can take this out, drill a hole, and tap the hole on the blind plug with a matching thread for your pressure sender.

Or

You can get the pre-drilled & threaded galley plug & washer from Subaru dealers or online Subaru parts sellers. From post#2: The part number for the galley plug is: 11024AA210 , with the corresponding washer: 037018200

From previous threads about installing senders in that galley plug, those with Autometer gauges (not you of course) have had to add an adaptor after that Subaru galley plug. The adaptor is an BSPT (the thread on the galley plug) to NPT (the thread on the Autometer sender), both 1/8" (but has different thread shape and pitch). Since according to http://www.jgbhose.com/base_pages/co...n_japanese.asp , the BSPT and the Japanese Tapered Pipe Thread (--> I'm guessing that the "1/8 PT" inscription you read is this JTPT) are identical and fully interchangeable, chances are that Subaru galley plug (and don't forget the washer) would be it. You should be able to fit the sender directly into the galley plug. Make sure you install the galley plug & washer onto the engine block first before installing the sender into the galley plug.

However, if the sender ends up being too big to mount directly as described (due to interference with neighboring hoses etc), then you'd have to look into a semi-remote install by means of a braided steel hose. Either way, you'd still need the galley plug, so I would start there first.

Good luck
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Old 01-02-2005, 12:47 PM   #14
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Note: My suggestion differ from root's suggestion per post #12 because I am assuming that "PT" is not equal to "NPT". I'll see if I can confirm which is which.

Quote:
Originally Posted by satrya
Since according to http://www.jgbhose.com/base_pages/co...n_japanese.asp , the BSPT and the Japanese Tapered Pipe Thread (--> I'm guessing that the "1/8 PT" inscription you read is this JTPT) are identical and fully interchangeable, chances are that Subaru galley plug (and don't forget the washer) would be it. You should be able to fit the sender directly into the galley plug. Make sure you install the galley plug & washer onto the engine block first before installing the sender into the galley plug.

Last edited by satrya; 01-02-2005 at 01:07 PM.
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Old 01-02-2005, 01:07 PM   #15
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Now I'm not entirey sure either. You might be right about 1/8 PT meaning 1/8 BSPT. I had assumed NPT. Looking back over my Defi docs, it is saying that if you need NPT for the oil pressure sender, then to use a converter for the PT to NPT, so that does seem to imply they are using PT to mean BSPT. Defi also seems to use NPT for all the temp sensors (so why they went BSPT for oil pressure? supplier I suppose).

wrxtra.com though seems to imply that the Defi sensor is NPT. Either way, I screwed mine into NPT (from wrxtra) and am not having any problems (yet ). Looks like the main difference is NPT is 27 threads per inch and BSPT is 28 threads per inch. Very very close. Possibly close enough that if it screws in and doesn't complain... However, I would attempt to use the correct threading of course.
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Old 01-02-2005, 01:09 PM   #16
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Default Confirmation

From: http://www.machinedesign.com/ASP/vie...MDSite&catId=0
Quote:
Note that JIS (Japanese Industrial Standards) threads are identified similar to BSPP and BSPT but defined with PF and PT, respectively.
So, your Blitz oil pressure gauge sender is threaded with 1/8 PT, which is identical to 1/8 BSPT. This would mean that the oem Subaru galley plug I recommended should be a direct plug-and-play with the Blitz sender.

The only question now is whether the sender's size allow for that direct installation amidst the hoses around the galley plug location.
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Old 01-02-2005, 01:14 PM   #17
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I will now proceed to eat crow. That's what I get for skimming the Defi docs too fast. Two of the three gauges (sensors) I just installed were NPT, so I just assumed all their sensors were NPT. Guess we know what happens when you make assumptions.
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Old 01-02-2005, 01:14 PM   #18
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Quote:
Originally Posted by root
Looks like the main difference is NPT is 27 threads per inch and BSPT is 28 threads per inch. Very very close. Possibly close enough that if it screws in and doesn't complain... However, I would attempt to use the correct threading of course.
Indeed. In addition to the pitch, the NPT and BSPT threads differ slightly in the thread shape (whether the edges are rounded or not, and what the thread angle is; 60 deg for NPT and 55 for BSPT [http://www.mcmaster.com/param/html/MetalConnections/ ]).

But yes, others have also simply forced the two together without leakage problems. That doesn't mean a leakage cannot occur at all. So, gotawd, I believe this should solve your problem now.

Quote:
Originally Posted by root
Defi also seems to use NPT for all the temp sensors (so why they went BSPT for oil pressure? supplier I suppose).
Is it possible that Defi comes in different threads depending on their intended market?
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Old 01-02-2005, 01:24 PM   #19
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Quote:
Originally Posted by satrya
Is it possible that Defi comes in different threads depending on their intended market?
I'm just going insane. Please delete everything I posted on this thread. Re-reading the docs yet again... I discovered the NPT versions of those sensors my eyes locked were the optional parts. So they do come BSPT. But you can get NPT from them if ordered separately it appears. Sigh. And here I thought I was helping out.
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Old 01-02-2005, 01:30 PM   #20
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Default Summary

(1) Get the Subaru oil galley plug and corresponding washer (Part # 11024AA210 & 037018200) from your local dealer or online suppliers like www.subaruparts.com or perhaps allsubaru.com . Total cost should be in the neighborhood of US$10-15.00

(2) Search for "oil" "gauge" "pressure" in NASIOC for useful pictures and advice. Download tech information from sites like www.wrxtra.com that has pictures

(3) Make sure you have all the necessary tools. From previous threads, having a crow's feet wrench helps a lot. I didn't. It was very tough to remove the blind plug that is to be replaced by the threaded galley plug. I had to use an allen key combined with a makeshift breaker bar. The ~US$17 cost of the crow's feet wrench is probably well worth the agony of not having one.

(4) Remove the intercooler per available instructions like the one from wrxtra. Note how far down the hoses are mounted relative to the pipings. This is especially important for the hose that connects the intercooler to the throttle and the turbo.

(5) Remove the blind plug and corresponding washer from the engine block.

(6) The threaded galley plug should have a thread sealant material already applied on the outer thread (that mates with the engine block). Install and torque it to spec. Don't forget the new washer.

(7) Put thread sealant on the sender's thread. Follow thread sealant's instruction regarding how much and which threads to apply on to. I prefer thread sealant than teflon tape, but it probably doesn't matter much in this case.

(8) Install the sender, and torque it to spec.

(9) While the intercooler is still removed, notice the blind rubber plug on the firewall, near the brake booster (assuming your vehicle is a usdm version; the jdm's brake booster is on the opposite side afaik). You can pull it out, and make an incision for the wire to pass through into the cabin. Route the wire through there.

(10) Re install the intercooler. Make sure the hoses mount as deep as before.

(11) For which wiring to tap, www.northursalia.com should have a useful radio pinout to tap from, or just use the oem clock's wiring, which should be labeled on the clock's side.
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Old 01-02-2005, 01:33 PM   #21
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Quote:
Originally Posted by root
I discovered the NPT versions of those sensors my eyes locked were the optional parts.
That's actually nice imho. Having to use an adapter means more parts that can potentially leak.
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Old 01-02-2005, 01:45 PM   #22
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hey thanks for all the help. From what i see here im going to order the subaru oil gallery plug and washer and get on that this weekend. Satrya thanks for the step by step instructions.
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Old 01-02-2005, 02:14 PM   #23
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also since im on the gauge installation....from what i read about the egt you just remove the stock sensor from the uppipe and put a 2ohm resistor there to keep the ecu happy and just put the next one in the hole right?
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Old 01-02-2005, 07:49 PM   #24
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You're welcome. Since I have no first hand experience on the EGT, whatever I can tell you will be based on reading previous threads.

Bump; in case someone that has installed an EGT sensor would like to chime in.
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Old 01-02-2005, 09:10 PM   #25
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one last question, so the subaru oil gallery plug is just a adapter to use my blitz plug that came with the gauge???
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