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Thread: Mustang Power Steering Rack Leaks at Connection to Pump

  1. #1
    Senior Member Funding Member Carlewms's Avatar
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    Mustang Power Steering Rack Leaks at Connection to Pump

    I finished ... Or at least thought I did ... Installing the high pressure supply line and the return line between the rack. I filled the reservoir and today I found a large pool of fluid apparently coming from the return fitting on the rack.

    It had a new o ring when installed. What are my options?

    Thanks,

    Carl
    From the Olde Goat Garage

    Building an FFR Mk 4 Roadster
    347 Stroker with EFI, SA T5, IRS
    Kit Arrived: 10/25/2012
    Build Started: 4/8/2013
    Rolling Chassis and Engine/Transmission Installation: 8/23/2015
    Go Kart: 3/26/2016

    Another deadline not met ... so it will just get done sometime soon


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  2. #2
    Administrator Funding Member Ron77's Avatar
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    Check the fitting closely and make sure the 0 ring is seated and that the fitting itself doesn't have a bad spot in it. And why would the return line leak if you never had any fluid going through there. If it is leaking and you haven't ran the pump to push fluid through the system, check where the fitting is made onto the rack and see if it has a small crack or isn't good.

    Ron


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  3. #3
    GROUCHY FUC***G OLD APE Funding Member Silverback's Avatar
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    Check the fitting in the rack assembly also.

  4. #4
    Senior Member Funding Member Carlewms's Avatar
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    Ron,

    Thanks for the ideas ... I am going to pull the lines and check both fittings for the things you mentioned.

    Carl
    From the Olde Goat Garage

    Building an FFR Mk 4 Roadster
    347 Stroker with EFI, SA T5, IRS
    Kit Arrived: 10/25/2012
    Build Started: 4/8/2013
    Rolling Chassis and Engine/Transmission Installation: 8/23/2015
    Go Kart: 3/26/2016

    Another deadline not met ... so it will just get done sometime soon


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  5. #5
    Senior Member Funding Member Carlewms's Avatar
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    Ron and Silverback,

    Thanks ....I pulled the low pressure return line and this is what I found. The "o" ring was completely torn apart.







    I do now realize I over tightened the fitting and I do have a spare "o" ring to install. I need to see if there is any damage on the female fitting on the rack.

    Questions:

    1. Can I put thread sealer on the threads as additional barrier?
    2. How do I prevent tightening them too the point of destruction of the seal?

    Thanks,

    Carl
    From the Olde Goat Garage

    Building an FFR Mk 4 Roadster
    347 Stroker with EFI, SA T5, IRS
    Kit Arrived: 10/25/2012
    Build Started: 4/8/2013
    Rolling Chassis and Engine/Transmission Installation: 8/23/2015
    Go Kart: 3/26/2016

    Another deadline not met ... so it will just get done sometime soon


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  6. #6
    Administrator Funding Member Ron77's Avatar
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    Carl,

    I used that thread tape on mine and it never did leak. I can't remember the name of the tape but it is white and you just wind it around the threads and it will seal. Then when you want to take the fitting apart if you ever need to it is easy. Any thread sealer will work as long as you don't use locktite. As for tightening them, I always just did it until they were snug and then if they dripped a little I would tighten them just a little more. I never did destroy an 0 ring that way.

    Ron


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  7. #7
    Senior Member Funding Member Carlewms's Avatar
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    Ron,

    Thanks. While I have the return line off I am going to check the high pressure line as well I had some fluid to the level above the high pressure connection to see if it is leaking as well.

    Regarding the return line, I have inspected the threads on the male connector and female end on the rack and they look clean. I put a new Teflon seal on the male connector and will reinstall using the thread seal.
    From the Olde Goat Garage

    Building an FFR Mk 4 Roadster
    347 Stroker with EFI, SA T5, IRS
    Kit Arrived: 10/25/2012
    Build Started: 4/8/2013
    Rolling Chassis and Engine/Transmission Installation: 8/23/2015
    Go Kart: 3/26/2016

    Another deadline not met ... so it will just get done sometime soon


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  8. #8
    Administrator Funding Member Ron77's Avatar
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    Carl,

    That should do it. Just make sure that you check it a few times after you run it and make sure the 0 ring is seated and the connection is tight.

    Ron


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  9. #9
    Moderator Funding Member James Stern's Avatar
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    Did you make sure the fluid was NOT goat urine?
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    Senior Member KING Nomad Funding Member nomad's Avatar
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    I'm just sitting here thinking you may have overtightened the fitting on the low pre4ssure return line, and thereby destroying the O Ring.

    Hope this helps.
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  11. #11
    Senior Member Funding Member Morris's Avatar
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    When you are done with the lines.....use your drill to spin the pump to get the air out (tiny bubbles) and check the fittings at higher pressures.....

  12. #12
    Senior Member AC Bill's Avatar
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    Not a bad idea to put a little lube on an o-ring, rather than tightening them up dry. Similar to a seal on an oil filter, it prevents friction against it and possibly getting torn.
    I've used both teflon tape, and thread sealant on fittings. Usually the sealant when there is a water/coolant passage involved, such as on some of the front bolts on the 302 block. The teflon tape or teflon paste, seems to work well on oil fittings with lower pressures.
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  13. #13
    Senior Member Funding Member Carlewms's Avatar
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    Update: I installed new Teflon ring on the return line and wrapped some white Teflon tape on the threads .... and it still leaks at that fitting. The good news is it's not as much!

    Another question:

    Is there supposed to be a white Teflon "o" ring AND a rubber "o" ring? The Mustang hoses just came with the Teflon ones installed but with an additional rubber one in a package.

    I will do the spin test once I get the static leaking stopped.

    Thanks all!

    Frustrated in the Olde Goat Garage
    From the Olde Goat Garage

    Building an FFR Mk 4 Roadster
    347 Stroker with EFI, SA T5, IRS
    Kit Arrived: 10/25/2012
    Build Started: 4/8/2013
    Rolling Chassis and Engine/Transmission Installation: 8/23/2015
    Go Kart: 3/26/2016

    Another deadline not met ... so it will just get done sometime soon


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  14. #14
    Senior Member AC Bill's Avatar
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    I wonder if the teflon o-ring is made for when using certain types of PS fluid, like maybe synthetics, vs regular PS fluid or even ATF?
    I know that AC systems changed the o-ring material used, several years back, when they switched to a different refrigerant. The old style rings would deteriorate if used. Is there some new modern type of PS fluid on the market?

    Never heard of using two o-rings on the same fitting before. You think that would cause an issue with proper sealing, as how could either one seat properly, being squished together?
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  15. #15
    Senior Member Funding Member Carlewms's Avatar
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    Thanks Everyone,

    After installing with teflon pipe thread tape ... It still leaked.

    But the good news is I think I found the leak and it was not between the connector and the rack, but on the return line fittings.

    I was able to isolate the leak to the point where the hose tube enters the connector (where it swivels). As I moved the swivel, the leak got worse.

    I have decided to abandon the rubber hose idea and order the parts from Breeze to make my own hoses.

    Carl
    From the Olde Goat Garage

    Building an FFR Mk 4 Roadster
    347 Stroker with EFI, SA T5, IRS
    Kit Arrived: 10/25/2012
    Build Started: 4/8/2013
    Rolling Chassis and Engine/Transmission Installation: 8/23/2015
    Go Kart: 3/26/2016

    Another deadline not met ... so it will just get done sometime soon


    Click this link to see my albums (http://talk.cobraregistry.com/album.php?u=1201)

  16. #16
    Senior Member Funding Member Carlewms's Avatar
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    Quote Originally Posted by James Stern View Post
    Did you make sure the fluid was NOT goat urine?
    I will send you up a sample to taste test for me!
    From the Olde Goat Garage

    Building an FFR Mk 4 Roadster
    347 Stroker with EFI, SA T5, IRS
    Kit Arrived: 10/25/2012
    Build Started: 4/8/2013
    Rolling Chassis and Engine/Transmission Installation: 8/23/2015
    Go Kart: 3/26/2016

    Another deadline not met ... so it will just get done sometime soon


    Click this link to see my albums (http://talk.cobraregistry.com/album.php?u=1201)

  17. #17
    Administrator Funding Member Ron77's Avatar
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    Carl,

    That is rare in new hoses but I have seen it a time or two. The quality control is just not what it used to be for sure. I am happy that you now have it figured out for sure and a new hose clamped correctly into the fitting will surely take care of that. Just remember to not over tighten it this time.

    Ron
    Last edited by Ron77; 12-02-2015 at 04:39 AM.


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  18. #18
    Senior Member Funding Member Carlewms's Avatar
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    Ron,

    Thanks. I have decided to convert the to SS Teflon lined SS hose. An FFR vendor Breeze Automotive sells the following parts to convert to AN6:

    5/8" to AN6 Fitting for the low pressure fitting at the rack and the high pressure fitting at the pump;
    9/16" to AN6 Fitting for the high pressure fitting at the rack;



    Teflon lined SS braided hose rated for power steering system pressures;



    AN6 Fittings (2) 90 deg elbows for the rack end; and,



    AN6 Fittings (1) Straight for the high pressure pump end.

    Last edited by Carlewms; 12-02-2015 at 05:52 AM.
    From the Olde Goat Garage

    Building an FFR Mk 4 Roadster
    347 Stroker with EFI, SA T5, IRS
    Kit Arrived: 10/25/2012
    Build Started: 4/8/2013
    Rolling Chassis and Engine/Transmission Installation: 8/23/2015
    Go Kart: 3/26/2016

    Another deadline not met ... so it will just get done sometime soon


    Click this link to see my albums (http://talk.cobraregistry.com/album.php?u=1201)

  19. #19
    Administrator Funding Member Ron77's Avatar
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    Carl,

    That sounds like a very good set up. How much longer until we get to see the video of your start up and first go cart ride?

    Ron


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  20. #20
    Senior Member Funding Member Carlewms's Avatar
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    Ron,

    If I can get the parts for the power steering and finish some wiring by next week and the other stuff on my check list done ... it should be the weekend of December 19th.
    From the Olde Goat Garage

    Building an FFR Mk 4 Roadster
    347 Stroker with EFI, SA T5, IRS
    Kit Arrived: 10/25/2012
    Build Started: 4/8/2013
    Rolling Chassis and Engine/Transmission Installation: 8/23/2015
    Go Kart: 3/26/2016

    Another deadline not met ... so it will just get done sometime soon


    Click this link to see my albums (http://talk.cobraregistry.com/album.php?u=1201)

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