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brakes...cant get rear lines to stop leaking!

Discussion in 'The Garage' started by broncoman6524, Apr 25, 2007.

  1. broncoman6524

    broncoman6524 1/2 ton status

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    ok on the top of the diff cover. theres the main line which goes into the junction box i guess. one of the 2lines that go to the axle are leaking.

    i CANNNOT get them to seal! ive tried tighteing all of the lines. and short of actually pulling them off, i cant seem to get them right

    any suggestions? maybe pull them off clean everything up REAL good and flare them out again?
     
  2. goldwing2000

    goldwing2000 Guest

    Yeah, sounds like either a bad flare, bad seat or just different kinds of flares on the two.
     
  3. gmc4cw

    gmc4cw 1/2 ton status GMOTM Winner

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    I agree. there is only a few things that could be wrong. unhook everything and check the flare and seat. could be rusty or have a groove in it.
     
  4. TexasBlazerBoy

    TexasBlazerBoy 1/2 ton status

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    Damn, I wish I had that problem. I can't get any brake fluid back to my rear brakes.:o
     
  5. goldwing2000

    goldwing2000 Guest

    Sounds like either a bad master or a bad combo valve. Possibly a steel line rusted shut or the rubber hose degraded to the point where it's plugged itself up.
     
  6. Mudstud

    Mudstud 1/2 ton status

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    Cracked fitting or cracked hardline.
     
  7. broncoman6524

    broncoman6524 1/2 ton status

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    welpi started messin with it today...on the drives line. it leaks between teh flare and fitting. if that makse sense so when its installed it leaks around the hardline NOT the fitting. so im off to the parts store to get a new line adn poss the t-fitting block thing.

    i cleaned it, sanded the flare, blew out the line/block. cleaned EVERYthing with brake cleaner, wrapped the fitting with teflon tape. all with no avail. hope this works...
     
  8. Pvt. Maggot

    Pvt. Maggot 1/2 ton status

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    I had that problem, I cranked the fitting down and it stopped, but still having alot of problems with my back brakes, have fluid, but they will not build pressure at all. I'm about to just switch to disks, if I could find any info on it.
     
  9. broncoman6524

    broncoman6524 1/2 ton status

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    id do that...except when i cranked it down. it started to strip it.
     
  10. Pvt. Maggot

    Pvt. Maggot 1/2 ton status

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    I'd get some new fittings, they need snugged down pretty good, and redo the flare just to make sure.
     
  11. broncoman6524

    broncoman6524 1/2 ton status

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    thats waht im plannin on when. i go im gonna get new hardlines like i said...and just hope for hte best...lol
     
  12. Pvt. Maggot

    Pvt. Maggot 1/2 ton status

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    Are your lines bad? really rusty or anything? If not i'd say try and reflare before you spend money on new lines. Its nice to know they are new though.
     
  13. broncoman6524

    broncoman6524 1/2 ton status

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    no theyre not rusty at all...this started only after i swapped axles...10-10. hmm maybe theyre not tight enough. idk im gonna go put it back to gether and put vicegrips on the thingys and try it that way :) lol
     
  14. Pvt. Maggot

    Pvt. Maggot 1/2 ton status

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    just go pickup a new fitting, re double bubble it, and crank it down, it should seal right up.
     
  15. broncoman6524

    broncoman6524 1/2 ton status

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    welp as of right now its sealed...:D lol. theyre bled as best as i can alone...so well se once theyre bled properly.
     
  16. Mudstud

    Mudstud 1/2 ton status

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    I wouldn't use teflon tape on those fittings. You certain you are using all the same fittings- not mixing up AN and NPT or something.
     
  17. goldwing2000

    goldwing2000 Guest

    Teflon tape won't really hurt anything but it's completely unnecessary. The line seals on the flare and seat, not the threads.

    Definitely make sure you're using the right fittings, though. An AN fitting would be next to impossible to mistake for a double-flare brake line but it would be easy to mix SAE and Metric lines.
     

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