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post #1 of 22 Old 09-13-2015, 10:08 PM Thread Starter
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Power steering plumbing

OK, finally getting ready to start re-installing stuff.

I've got a Termi rack; an SN95 pump.

Got the MM Rack AN adapters. Need to order some hose and fittings, not a big deal, Earl's makes what looks like the right stuff. I flipped through Goodridge's catalog, but it's a little difficult to figure out.

I'm looking at the pump body, and it looks like the pressure side uses either a 5/8" (or probably 16mm) thread. The factory fitting I took off the old pump is set up like a brake line, with a hard line going through a threaded fitting. That's the fitting I measured to come up with the 5/8" or 16mm size.

So, my current thinking is this: can I use a 16mm to -6 AN adapter on the pump side? There's an o-ring on the factory hard line, is there a specific adapter that might be usable for what I'm trying to do?

My other idea was a banjo fitting with crush washers...I dunno about that one.

This is all sort of assuming that the OEM fitting is actually 16 x 1.5. Not 100% sure about size and pitch quite yet.


88GT with the 5.slow
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post #2 of 22 Old 09-15-2015, 12:55 PM
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Post 15 shows how I adapted the pump to -an fittings

https://forums.corral.net/forums/94-9...ting-size.html


Dart 348ci, Ed Curtis cam/valvetrain, Precision 76mm, Holley Dominator EFI, CNP ignition, tons of Holler EFI small parts, 4"dp, 4R70W w/T-brake, new suspension coming soon.

Little 750rwhp at 6,000rpms and only 10lbs of boost before we just got tired of playing with clutches. New 4R70W and we are turning it up. Expecting 1,000rwhp.
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post #3 of 22 Old 09-15-2015, 02:27 PM Thread Starter
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Yea there we go. We had a brass 16x1.5 plug laying around, so I was able to confirm that was the thread size on the pump. I ordered the Earl's stuff already, and there's an Aeroquip place right by me that I plan to use to get the hose and have them install the ends. So far, so good.

Did you leave the OEM "cooler" hooked in? Those are just barbs with hose clamps, which I guess I'll keep as-is.

88GT with the 5.slow
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post #4 of 22 Old 09-15-2015, 02:33 PM
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Yea there we go. We had a brass 16x1.5 plug laying around, so I was able to confirm that was the thread size on the pump. I ordered the Earl's stuff already, and there's an Aeroquip place right by me that I plan to use to get the hose and have them install the ends. So far, so good.

Did you leave the OEM "cooler" hooked in? Those are just barbs with hose clamps, which I guess I'll keep as-is.
I used a -6am power steering cooler. I believe it is made by flex-a-lite. Kept it teflon core steel braided -6an line all the way. Hardest part will be converting from -6an line to the barb on the back of the pump. In fact that is the only hose clamp on a fluid line on my entire car

Dart 348ci, Ed Curtis cam/valvetrain, Precision 76mm, Holley Dominator EFI, CNP ignition, tons of Holler EFI small parts, 4"dp, 4R70W w/T-brake, new suspension coming soon.

Little 750rwhp at 6,000rpms and only 10lbs of boost before we just got tired of playing with clutches. New 4R70W and we are turning it up. Expecting 1,000rwhp.
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post #5 of 22 Old 09-15-2015, 04:59 PM Thread Starter
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I thought about picked up a small Derale cooler to replace the stock pipe, but I think maybe I'll wait and see how this holds up.

Thanks!

88GT with the 5.slow
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post #6 of 22 Old 09-18-2015, 04:58 PM
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are the threads at the racks and pumps all the same from 79-04?

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post #7 of 22 Old 09-20-2015, 01:44 AM Thread Starter
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For the racks, I think yes, since the MM -6 AN kit is sold for that year range. They don't specify on their website, but I think the threads on the rack are 10x1.5 and 12x1.5.

As to the pump, somebody smarter than me will have to chime in...

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post #8 of 22 Old 10-24-2015, 02:10 PM
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hoping someone will chime in on the modular pump threads

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post #9 of 22 Old 10-27-2015, 01:18 AM
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The racks are the same from about 1982-2004. The pumps changed between 1989 and 1990.

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post #10 of 22 Old 10-27-2015, 06:59 PM
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what about the modular pumps?


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post #11 of 22 Old 10-27-2015, 07:07 PM
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All 1990-2004 pumps use the same threads on the outlet, but the fitting changed between 1993 and 1994.

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post #12 of 22 Old 10-27-2015, 07:12 PM
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thanks jack

what's the thread? isn't it the same as the rack?

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post #13 of 22 Old 10-27-2015, 07:54 PM
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The early Fox pumps are 5/8"-18. The later pumps are M16 x 1.5.

Both these outlets have a special design that is not commercially available off the shelf. Many people describe it as an o-ring fitting, but that is incorrect. It uses an o-ring, but the geometry is different.

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post #14 of 22 Old 10-28-2015, 12:10 AM Thread Starter
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IIRC, it's almost like a Dowty seal that sits underneath the banjo bolt on the pressure/outlet side. As opposed to being under the head.

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post #15 of 22 Old 11-14-2015, 09:28 PM
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while on the subject do you guys know of anyone that makes a steering cooler with 6AN fittings or am I stuck with either the barb hoses ends or NPT?

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post #16 of 22 Old 11-15-2015, 12:31 AM Thread Starter
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Might something like this work?

Frame Rail : 2 Pass 17" Series 7000 Copper/Aluminum Frame Rail Cooler

88GT with the 5.slow
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post #17 of 22 Old 11-15-2015, 01:46 PM
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that's perfect... thanks willyt

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post #18 of 22 Old 12-01-2015, 07:35 PM
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does the fox pumps use a vented or non-vented cap?

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post #19 of 22 Old 12-02-2015, 02:20 PM Thread Starter
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non-vented. I think. My cap is a solid one piece. Course, I say that, I'm not even sure if this thing will plug into the SN pump. derp.

What would it vent to? I mean, I don't know what the pressure is in a steering system, but it's got to be more than the 15psi or so of the cooling system?

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post #20 of 22 Old 12-02-2015, 02:26 PM
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Quote:
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does the fox pumps use a vented or non-vented cap?
I'm pretty sure there's a little vent hole in them.
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post #21 of 22 Old 12-03-2015, 10:55 AM
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For what its worth...when I put a 2000 Cobra-R SN95 rack in my fox body I used 94 V6 SN95 hoses with no drama.

That fitting on the pump is designed as a 1 time use quick fit connection for the assembly plants. Once its attached to the hose its not serviceable.

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post #22 of 22 Old 12-03-2015, 11:45 AM
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For what its worth...when I put a 2000 Cobra-R SN95 rack in my fox body I used 94 V6 SN95 hoses with no drama.

That fitting on the pump is designed as a 1 time use quick fit connection for the assembly plants. Once its attached to the hose its not serviceable.
I'm not sure which fitting you are referring to. The high pressure port on the pump? What makes it one time use? Rock auto sells power steering pump rebuild kits and replacement reservoirs, but those fittings are not included. Can you please clarify?
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