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Old 01-20-2002, 02:45 AM   #1
Revision
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Default RS Oil Pressure Sender Install Pics








Picture 1 shows the parts that you will likely need. I ended up finally replacing the 1/4 compression fittings and copper tubing for 1/8 compression fittings and 1/8 nylon (autometer) tubing. I've also added another 90 degree street elbow to the brass T section in order to facilitate pointing the compression fitting upward.

Picture 1 also show the 1" clamp (Home Depot pipe bracket) that needs to be drilled out to fit the bolt on the powersteering bracket.

Picture 2 shows the location of the bracket/nut that you will use to mount the oil pressure sender. It also shows the close clearance that the tubing (protected by convoluted tubing) is to the altenator.

Picture 3 shows the final angle of the T fitting with the altenator removed. And yes it is a tight fit to get the belt back on because the stock oil pressure sender gets in the way, but it is possible to get it back on. Just be careful not to crush the stock sender. (See pic 2 as well)
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Last edited by Revision; 01-22-2002 at 09:06 PM.
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Old 01-20-2002, 03:01 AM   #2
HndaTch627
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Very nice work andrew
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Old 01-20-2002, 10:38 AM   #3
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looking good man. Whats next on the list?
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Old 01-21-2002, 12:03 AM   #4
Patrick Olsen
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Nice work, very good job of making things fit into that tight location. I do have just one question - poly tubing? For oil? What kind of poly tubing are you using? I'm not sure I'd be comfortable with that, even if it is just a short length of tubing.

Oh, and I read on here somewhere recently that Subaru's run pretty high oil pressures. So, what kind of pressure do they run?

Pat Olsen
'97 Legacy 2.5GT sedan
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Old 01-21-2002, 02:02 AM   #5
Revision
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Polystyrine tubing, the same stuff they are using for the manual boost gauge. You know, the nylon tubing.

The only real danger seems to be from melting the tubing on the engine block or shattering it in cold weather.
Hence lots of protection using more corrgulated tubing.

I didn't really think that the copper tubing could handle Subaru oil pressures. I'm seeing from 15 psi at idle to 82-90 psi at wot.

I also took some time to try out some AN fiittings, but couldn't get the hose length and angles on the AN fittings to work out without interfering with the altenator.
Braided steel lines touching altenator bad!
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Old 01-21-2002, 02:57 AM   #6
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Hey Andrew, this just occourred to me... What if you put on a 90 elbow with male/male threads before the T? You might be able to fanagle yourself enough room for everything a little better that way... ya think?
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Old 01-21-2002, 09:20 AM   #7
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I have a vac/boost gauge on my Mustang, so I think I know what 1/8" poly tubing you're referring to. I'd be really uncomfortable using that for high pressure oil that is probably over 200degF. You could be right about the copper tubing not being tough enough, I honestly don't know.

If it were my car, I would make the braided hose and -AN fittings work. That probably means mounting the Autometer sending unit somewhere else - I can definitely see what you mean about not being able to make that type of setup fit in the current location. But for safety's sake I think it's worth it to move the sending unit and maybe use a foot or two of braided line to make it work. I'll have to go take a look at my car to see where it might fit - right now I'm sitting here in my robe, having just gotten out of bed 20min ago , and it's entirely too cold to go wandering around outside in my robe .

Pat
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Old 01-22-2002, 02:10 AM   #8
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I got the Autometer oil pressure sending unit to thread into the stock sender hole using the Autometer supplied BSPT adapter, and and 1/8 NPT angle fitting on my EJ25 (Forester). If anyone is interested I will post photos. I too am not willing to risk a major oil leak using tubing of any kind. The more complex a system becomes-the greater the chance for failure!

Dave
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Old 01-22-2002, 08:37 AM   #9
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Quote:
I have a vac/boost gauge on my Mustang, so I think I know what 1/8" poly tubing you're referring to. I'd be really uncomfortable using that for high pressure oil that is probably over 200degF. You could be right about the copper tubing not being tough enough, I honestly don't know.
Pat: Autometer supplies a similar nylon hose for the mechanical oil pressure gauge. It held up in my car at Summit Point.

A quick check at some tubing datasheets shows that nylon is a good material for the application, as long as it is rated for the expected operating pressures. I do remember seeing Home Depot poly tubing that was only rated for 50 or 60 psi - obviously not suitable for this application.

I wonder if Fishguy would like to post pics of the Home Depot Special we did on his car for the same oil pressure sender as the one in this thread?...

Andrew: nice job. There's an easy way to prevent chafing from SS braided lines - just wrap them in spiral cable wrap, and/or tie them down to prevent movement.

-WaC
Wayne
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Old 01-22-2002, 02:08 PM   #10
Patrick Olsen
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Thanks for setting me straight, Wayne. Being as anal as I am I'd probably still figure out some way to plumb it with braided lines, but if it worked fine during the track abuse on your car then I guess that poly tubing is fine.

Pat
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Old 01-22-2002, 09:03 PM   #11
Revision
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Well so far so good. No leaks and no rubbing visible. And I've already put 200 miles on the car since the install.

I'm seeing about 12-15 psi at idle 50 psi at cruise and about 90 psi at warmup and at 3/4 throttle.

The 1/8" nylon tubing is the same stuff from autometer. And I've got it wrapped with a layer of electrical tape followed by the black wire tubing.

I'll try another design later, but so far, this is the best way that I've found to mount the sender considering the limited space and mounting locations.

And thanks for all the Kudos guys!
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Old 01-23-2002, 12:26 AM   #12
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Dude...Very nice job..But that's the hard way to install a Oil pressure unit.. I'll post pics tommorow...Gerry
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