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  1. #1
    Veteran Member Four Rings
    Join Date
    Sep 15 2006
    AZ Member #
    11336
    My Garage
    97 A4 2.0TQM
    Location
    Rochester, NY

    Fuel filter leaking!

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    I changed the fuel filter less than 20k miles ago using OEM parts, OEM washers, properly torqued, etc. I noticed my car smelling like fuel really bad last night, and found this (you can see the fuel spraying out better if you click full size):



    Luckily it's an easy fix, but is there anything to prevent this from happening again (aside from moving to a place without snow/salt?) Maybe hit it with a coat of rustoloeum after I put it back together?
    Last edited by pac1085; 02-03-2008 at 09:36 AM.

  2. #2
    Veteran Member Four Rings onemoremile's Avatar
    Join Date
    Mar 09 2004
    AZ Member #
    1174
    My Garage
    99.5 A4 Avant, 01 allroad
    Location
    nw michigan.

    Re: Fuel filter leaking!

    Got the crushwasher in there? Paint won't seal it since gasoline eats paint.

    An open flame will clean up that extra fuel real nice...
    Jim

    We cannot achieve the future by being timid. It requires aggressive imagination.

    I Do Werk.

  3. #3
    Veteran Member Four Rings
    Join Date
    Sep 15 2006
    AZ Member #
    11336
    My Garage
    97 A4 2.0TQM
    Location
    Rochester, NY

    Re: Fuel filter leaking!

    Quote Originally Posted by onemoremile View Post
    Got the crushwasher in there? Paint won't seal it since gasoline eats paint.

    An open flame will clean up that extra fuel real nice...
    Well, there WAS a crush washer in there. It rotted out(after less than 20k miles) thats why its leaking.

    I think you read the paint thing wrong. I wasn't planning on just throwing a coat of paint on this the way it is and hope it stops leaking... dude come on! After I clean it up, replace the washers, I was thinking of hitting it with a coat of paint to prevent it from corroding again.

  4. #4
    Registered Member Two Rings manufan's Avatar
    Join Date
    Nov 16 2007
    AZ Member #
    22645
    My Garage
    98 A4 2.8 QM 93 Ducati 900ss
    Location
    northern pa

    Re: Fuel filter leaking!

    The roads where I live are similar to yours. I'm surprised that the crush ring would corrode that much. Is the face of the banjo pitted that helped create the leak? After you get it all dried up, you could spray it with that waxy undercoating stuff to keep the weather off it.

  5. #5
    Veteran Member Four Rings
    Join Date
    Sep 15 2006
    AZ Member #
    11336
    My Garage
    97 A4 2.0TQM
    Location
    Rochester, NY

    Re: Fuel filter leaking!

    Quote Originally Posted by manufan View Post
    The roads where I live are similar to yours. I'm surprised that the crush ring would corrode that much. Is the face of the banjo pitted that helped create the leak? After you get it all dried up, you could spray it with that waxy undercoating stuff to keep the weather off it.
    I haven't taken it apart yet, but I'll check for sure. It's not rotted in just that one area where it's leaking, there's hardly anything left of the washer all the way around.

  6. #6
    Registered Member Two Rings manufan's Avatar
    Join Date
    Nov 16 2007
    AZ Member #
    22645
    My Garage
    98 A4 2.8 QM 93 Ducati 900ss
    Location
    northern pa

    Re: Fuel filter leaking!

    No disrepect intended, but is it possible that the crush ring was either reused or crushed too much leaving a thinner edge to corrode?

  7. #7
    Veteran Member Three Rings creechsa4's Avatar
    Join Date
    Jan 06 2005
    AZ Member #
    4747
    Location
    san diego

    Re: Fuel filter leaking!

    probably setup a new banjo bolt bolt with a clear coat spray paint over the new and some marine grease over that, that'll make it rusto proof! i do the same for my brake rotors where the hub mounts.

  8. #8
    Veteran Member Four Rings
    Join Date
    Sep 15 2006
    AZ Member #
    11336
    My Garage
    97 A4 2.0TQM
    Location
    Rochester, NY

    Re: Fuel filter leaking!

    Quote Originally Posted by manufan View Post
    No disrepect intended, but is it possible that the crush ring was either reused or crushed too much leaving a thinner edge to corrode?
    Def. not reused, I bought the fuel filter from ECS and the washers from the dealer. As far as crushed too much, I doubt it. This was back when I had access to a lift and did everything exactly by the book (torque specs, etc)

    I'm just gonna chalk this one up to bad luck, and coat it with something after its re-assembled with new parts.

  9. #9
    Senior Member Three Rings Just Quaff's Avatar
    Join Date
    May 11 2007
    AZ Member #
    17940
    My Garage
    01 A4 1.8TQM
    Location
    Seattle, WA

    Re: Fuel filter leaking!

    Did you use AMPM fuel? lol
    18" VMR RS4's Hyper Black | Samco Diverter Valve | ATP 3" Test Pipe
    REVO chipped | Koni Adjustable Coilovers | 19mm Neuspeed Rear Sway
    AWE Vent Pod Boost Gauge | Seat Cupra R Front Lip | Painted Lowers | S4 Side Skirts
    2.5" Custom Cat-back Exhaust to Magnaflow 12158 | 6000K HID's

  10. #10
    Veteran Member Four Rings
    Join Date
    Sep 15 2006
    AZ Member #
    11336
    My Garage
    97 A4 2.0TQM
    Location
    Rochester, NY

    Re: Fuel filter leaking!

    Quote Originally Posted by Just Quaff View Post
    Did you use AMPM fuel? lol
    None of those around here but I do buy fuel from Habib at the local Arab Mobil.

  11. #11
    Veteran Member Four Rings onemoremile's Avatar
    Join Date
    Mar 09 2004
    AZ Member #
    1174
    My Garage
    99.5 A4 Avant, 01 allroad
    Location
    nw michigan.

    Re: Fuel filter leaking!

    Paint not needed. Michigan uses 22 tons of salt per lane mile per year which is as bad as it gets. Mine never leaked and neither has the one that has been in the S4 for 209k miles.
    Jim

    We cannot achieve the future by being timid. It requires aggressive imagination.

    I Do Werk.

  12. #12
    Account Terminated Four Rings
    Join Date
    Aug 05 2007
    AZ Member #
    20091
    My Garage
    B5 Nazi Sled
    Location
    Indiana

    Re: Fuel filter leaking!

    That reminds me of the time my friend and I swapped a B16 in his Integra. I was in charge of bolting some stuff back up. So I put in the fuel filter and apparently I just half assed it. When we went to start it up fuel was spraying everywhere. I tried to act like it wasn't me and it was him but I couldn't pull it off. :) I tightened it up and it was fine. Then he was shifting and his linkage started scrapping the ground. I started cracking up because I knew it wasn't me. Lol

    So how much of a bitch was the fuel filter for you?

  13. #13
    Veteran Member Four Rings onemoremile's Avatar
    Join Date
    Mar 09 2004
    AZ Member #
    1174
    My Garage
    99.5 A4 Avant, 01 allroad
    Location
    nw michigan.

    Re: Fuel filter leaking!

    Quote Originally Posted by ILoveT View Post
    That reminds me of the time my friend and I swapped a B16 in his Integra. I was in charge of bolting some stuff back up. So I put in the fuel filter and apparently I just half assed it. When we went to start it up fuel was spraying everywhere. I tried to act like it wasn't me and it was him but I couldn't pull it off. :) I tightened it up and it was fine. Then he was shifting and his linkage started scrapping the ground. I started cracking up because I knew it wasn't me. Lol
    I've got friend just like you. The dude is just cursed. He helped me button up the front of my engine. The upper timing belt cover was off but the bottom was on. He dropped one of the valve cover nuts and couldn't find it anywhere. Tore the whole front of the car off thinking it fell into the lower cover. After everything was apart he found it on the ground behind him.

    Same guy helped me change my PCV system. Broke a flange which fell ingo the block. That is what led me to rebuild the engine. I had to pull the pan to get that piece out of there anyway.
    Jim

    We cannot achieve the future by being timid. It requires aggressive imagination.

    I Do Werk.

  14. #14
    Veteran Member Four Rings
    Join Date
    Sep 15 2006
    AZ Member #
    11336
    My Garage
    97 A4 2.0TQM
    Location
    Rochester, NY

    Re: Fuel filter leaking!

    Took the fuel filter out today. Aluminum washers oxidized to shit, nothing left.



    Not a good pic, it looks worse in person, esp the other side.

    They were OEM from the dealer, dunno what to say. I bought a Purolator fuel filter this time since I needed it and the dealer was closed, it came with all copper washers. They should hold up much better than the aluminum.

  15. #15
    Veteran Member Four Rings SoFresh's Avatar
    Join Date
    Mar 15 2006
    AZ Member #
    10848
    My Garage
    Seduction Motorsports 1955 Porsche 550 Spyder
    Location
    Scottsdale, AZ

    Re: Fuel filter leaking!

    I had this happen to me, and I used all OEM parts picked up from the dealership... it sucked, leaked an entire full tank on the ground... lame. had to just go back and replace both the clamps.
    EUROPROJEKTZ

    www.SeductionMotorsports.com
    We are a premier builder of the vintage race-ready Porsche 550 Spyder & Porsche 356 Outlaw Coupe

  16. #16
    Veteran Member Three Rings
    Join Date
    Apr 01 2005
    AZ Member #
    5944
    My Garage
    two wagons
    Location
    Michigan

    Re: Fuel filter leaking!

    I'm leaking like a slow drip, which turns into a small puddle by the time I come out of someplace. I think this is the same problem and I will order a new fuel filter but just thought I would post asking for opinions before I go and replace.


  17. #17
    Veteran Member Three Rings stormscr3's Avatar
    Join Date
    Jul 08 2008
    AZ Member #
    30673
    My Garage
    2011 Ford Edge
    Location
    MA

    Re: Fuel filter leaking!

    You can try using some truck bed paint, like rhino lining. It's waterproof/rustproof and if you cover the right places oxidation/rust won't happen again. Great stuff for the underbody of some car parts.

  18. #18
    Veteran Member Four Rings Don Supreme's Avatar
    Join Date
    Jan 25 2006
    AZ Member #
    9902
    My Garage
    A4 2.0T
    Location
    MD

    Re: Fuel filter leaking!

    Sounds like a good excuse to throw one of these in.


  19. #19
    Veteran Member Four Rings Seerlah's Avatar
    Join Date
    Dec 05 2007
    AZ Member #
    23104
    Location
    A place between here and there

    Re: Fuel filter leaking!

    Quote Originally Posted by jaustin View Post
    I'm leaking like a slow drip, which turns into a small puddle by the time I come out of someplace. I think this is the same problem and I will order a new fuel filter but just thought I would post asking for opinions before I go and replace.
    FWIW, I had my fuel filter replaced a couple months back and for some odd reason the Mann filter would not seal correctly and kept leaking. My mechanic could not figure it out and finally the fitting came loose so he placed my old one back in and I drove home. Next day, he ordered a different one from where he usually orders parts and no leaks upon first install. Just a heads up.

  20. #20
    Veteran Member Four Rings hoganalley's Avatar
    Join Date
    Feb 23 2007
    AZ Member #
    15868
    Location
    Burlington

    Re: Fuel filter leaking!

    Gas tank repair kit. Buy the epoxy paste stuff from an auto parts store and use it like a gasket material when you put the washers on. Works like a charm. Don't know what it's like when you go to take it off, but it won't leak.
    05 allroad 2.7T Stock

    99.5 A4 1.8T K04 - Sold



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