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post #1 of 10 (permalink) Old 04-02-2015, 07:00 PM Thread Starter
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Steering Rack Question

Is the high pressure elbow that connects the PS hose to the rack supposed to swivel freely?

"When the only tool you have is a hammer, suddenly everything looks like a nail."
"Nothing is foolproof because fools are so ingenious."
1992 Ford Thunderbird SC

Coast High Peformance 347 Stroker
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post #2 of 10 (permalink) Old 04-02-2015, 07:04 PM
No, Mr. Lemmywinks, No!!!

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Yup, it's a swivel at the rack; one of the funner parts of replacing the rack.

If you could place both hands on it, it would thread right on, lol.

This is the Gates replacement:


That's from here:
http://www.rockauto.com/catalog/x,ca...,parttype,7320

Red '96 Cougar XR-7 240k mi. '02 4R70W, PST DS : '03 PI engine, 04 maf, 24lb injectors, 2.5" exhaust, '02 4r70w + Jmod, DirtyD0g TC + cooler + 3/8" lines, 255 walbro fp. Alpine system.
Black '96 Cougar XR-7 (Lazarus) 210k mi PI Intake, '02 4R70W, Jmod, PST DS, GrogTune, Konis, Mark LCA+Poly, racecougar Custom Engine Chain, and JL and racecougar Bracing.
Black '97 Tbird Limited Edition, '02 4R70W, 255 walbro, PST DS, PBR Brakes&SS lines, Toicko Blues & Springs, GrogTune.


"War Is Peace. Freedom Is Slavery. Ignorance Is Strength." - George Orwell.
Truth Isn't Truth. - Rudy Giuliani, 2018 Award winner, “Most Outrageous Diversion” by MSNBC for this quote

Last edited by Grog6; 04-02-2015 at 07:09 PM.
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post #3 of 10 (permalink) Old 04-02-2015, 07:07 PM Thread Starter
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Quote:
Originally Posted by Grog6 View Post
Yup, it's a swivel at the rack; one of the funner parts of replacing the rack.

If you could place both hands on it, it would thread right on, lol.
Is that part known to fail?

"When the only tool you have is a hammer, suddenly everything looks like a nail."
"Nothing is foolproof because fools are so ingenious."
1992 Ford Thunderbird SC

Coast High Peformance 347 Stroker
-Low Tension Oil Rings, Zero Gap Seconds
-10.5:1 Compression Ratio
Trick Flow Twisted Wedge heads
Trick Flow Stage 1 cam
Trick Flow Street Heat Intake
Mac 1 5/8 long tube headers
FRPP 42# injectors
3.27 gears
Custom aluminum driveshaft
M5R2
Burned Chip for SN95 T4M0 ECM
OMGHI2U

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post #4 of 10 (permalink) Old 04-02-2015, 07:16 PM
No, Mr. Lemmywinks, No!!!

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If it fails, it leaks like a sieve; if it's a gushin, that's probably it.

Red '96 Cougar XR-7 240k mi. '02 4R70W, PST DS : '03 PI engine, 04 maf, 24lb injectors, 2.5" exhaust, '02 4r70w + Jmod, DirtyD0g TC + cooler + 3/8" lines, 255 walbro fp. Alpine system.
Black '96 Cougar XR-7 (Lazarus) 210k mi PI Intake, '02 4R70W, Jmod, PST DS, GrogTune, Konis, Mark LCA+Poly, racecougar Custom Engine Chain, and JL and racecougar Bracing.
Black '97 Tbird Limited Edition, '02 4R70W, 255 walbro, PST DS, PBR Brakes&SS lines, Toicko Blues & Springs, GrogTune.


"War Is Peace. Freedom Is Slavery. Ignorance Is Strength." - George Orwell.
Truth Isn't Truth. - Rudy Giuliani, 2018 Award winner, “Most Outrageous Diversion” by MSNBC for this quote
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post #5 of 10 (permalink) Old 04-02-2015, 08:09 PM Thread Starter
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Quote:
Originally Posted by Grog6 View Post
If it fails, it leaks like a sieve; if it's a gushin, that's probably it.
Thanks. I didn't see the reply with the part number so I asked a stupid question. You guys nailed it.

"When the only tool you have is a hammer, suddenly everything looks like a nail."
"Nothing is foolproof because fools are so ingenious."
1992 Ford Thunderbird SC

Coast High Peformance 347 Stroker
-Low Tension Oil Rings, Zero Gap Seconds
-10.5:1 Compression Ratio
Trick Flow Twisted Wedge heads
Trick Flow Stage 1 cam
Trick Flow Street Heat Intake
Mac 1 5/8 long tube headers
FRPP 42# injectors
3.27 gears
Custom aluminum driveshaft
M5R2
Burned Chip for SN95 T4M0 ECM
OMGHI2U


Last edited by MaddMartigan; 04-02-2015 at 08:58 PM.
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post #6 of 10 (permalink) Old 04-03-2015, 07:33 AM
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High Pressure Fitting

Here's a picture of the High Pressure Fitting elbow end (The one that fits into the Rack & Pinion):
(MN12) Bad High Pressure Fitting.JPG

There's a few different reasons these things leak..Let's discuss the most common reason first..

There is an O-Ring underneath the fitting that eventually goes bad due to heat/chemical compatibility/shrinkage/swelling, many things..

When this O-Ring fails..The solution by Ford is to just replace the whole elbow..The O-Ring was never a serviceable part..


Moving on..The next most common reason these things leak are..The Teflon Seal goes bad..

Normally this seal doesn't just go bad on its own unless it's messed with..The Teflon Seal is one time use only..

So if you have to remove this fitting off of the rack..The Teflon Seal must be replaced before reattaching the fitting back onto the rack..

When you install the replacement Teflon Seal..Warming it up in warm water is suggested to make it more pliable to fit just over the threads of the fitting..


Probably the least common way this fitting fails is if it gets cracked in half..Perhaps from a combination of rust, or just being too rough on the part..

All 91-97 Thunderbirds/Cougars used the same fitting..As well as all 93-98 Mark VIII's used this same fitting as well..

IMO..If you can afford to it's best to use a Ford piece here vs Aftermarket..


The Ford Part Number for the High Pressure Fitting is: (F1SZ-3A719-D) or (F1SZ3A719D)

The Ford Part Number for the Teflon Seal is: 388743-S100

The High Pressure Fitting is still available new from your local Ford dealership, or online..

Unfortunately the Ford Teflon Seal has been discontinued..

You can find a replacement Teflon Seal at your local auto parts store..Dorman Help Part#82540
82540_1.JPG

IIRC..You use the smaller of the 2..


The aftermarket Edelman High Pressure Fitting is part #39141


In closing..If anyone has replaced the O-Ring seal in this fitting that commonly fails, and was successful (meaning it didn't leak)

Please post a part number, and or size of seal you used..






Rayo..

.
.
1991 Ford Thunderbird Sport

"If you don't know where you're going..Any road will take you there."George Harrison

Last edited by Rayo; 08-07-2017 at 01:47 AM. Reason: update pics..
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post #7 of 10 (permalink) Old 04-04-2015, 11:17 AM
No, Mr. Lemmywinks, No!!!

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I don't believe that piece comes apart to service the o-ring; I believe it's swaged together.

Red '96 Cougar XR-7 240k mi. '02 4R70W, PST DS : '03 PI engine, 04 maf, 24lb injectors, 2.5" exhaust, '02 4r70w + Jmod, DirtyD0g TC + cooler + 3/8" lines, 255 walbro fp. Alpine system.
Black '96 Cougar XR-7 (Lazarus) 210k mi PI Intake, '02 4R70W, Jmod, PST DS, GrogTune, Konis, Mark LCA+Poly, racecougar Custom Engine Chain, and JL and racecougar Bracing.
Black '97 Tbird Limited Edition, '02 4R70W, 255 walbro, PST DS, PBR Brakes&SS lines, Toicko Blues & Springs, GrogTune.


"War Is Peace. Freedom Is Slavery. Ignorance Is Strength." - George Orwell.
Truth Isn't Truth. - Rudy Giuliani, 2018 Award winner, “Most Outrageous Diversion” by MSNBC for this quote
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post #8 of 10 (permalink) Old 04-08-2015, 07:19 PM Thread Starter
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I have a replacement and the nut that goes into the steering rack is 18mm on the new part. Just to verify, is the stock part 18mm as well?

"When the only tool you have is a hammer, suddenly everything looks like a nail."
"Nothing is foolproof because fools are so ingenious."
1992 Ford Thunderbird SC

Coast High Peformance 347 Stroker
-Low Tension Oil Rings, Zero Gap Seconds
-10.5:1 Compression Ratio
Trick Flow Twisted Wedge heads
Trick Flow Stage 1 cam
Trick Flow Street Heat Intake
Mac 1 5/8 long tube headers
FRPP 42# injectors
3.27 gears
Custom aluminum driveshaft
M5R2
Burned Chip for SN95 T4M0 ECM
OMGHI2U

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post #9 of 10 (permalink) Old 04-08-2015, 10:13 PM
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Yes it is 18 mm. If I have to do this again, I have identified a couple of places to grind away so the fittings can be attached before the rack is placed in the car.

Removing/installing those fittings in the manner you have to is one of those jobs that make you want to slap the engineer that said "Yep, that hole is big enough".

1993 Thunderbird
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post #10 of 10 (permalink) Old 04-09-2015, 04:06 AM Thread Starter
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Quote:
Originally Posted by weskan View Post
Yes it is 18 mm. If I have to do this again, I have identified a couple of places to grind away so the fittings can be attached before the rack is placed in the car.

Removing/installing those fittings in the manner you have to is one of those jobs that make you want to slap the engineer that said "Yep, that hole is big enough".
I'm going to try and replace the fitting without dropping the rack. I'm hoping I can do it with a crow's foot wrench.

"When the only tool you have is a hammer, suddenly everything looks like a nail."
"Nothing is foolproof because fools are so ingenious."
1992 Ford Thunderbird SC

Coast High Peformance 347 Stroker
-Low Tension Oil Rings, Zero Gap Seconds
-10.5:1 Compression Ratio
Trick Flow Twisted Wedge heads
Trick Flow Stage 1 cam
Trick Flow Street Heat Intake
Mac 1 5/8 long tube headers
FRPP 42# injectors
3.27 gears
Custom aluminum driveshaft
M5R2
Burned Chip for SN95 T4M0 ECM
OMGHI2U

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