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Thread: Brake reservoir Bleeding brakes

  1. #1
    Senior Member DavidW's Avatar
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    Brake reservoir Bleeding brakes

    So I must have air in the system, fluid is coming out of the reservoir. Anyone have a source to a reservoir cap to fit the FFR old style reservoir so I can pressure bleed the brakes.


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    Senior Member DavidW's Avatar
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    So I assume its still air in the system. After I replaced the rear axle bearings and seals I noticed the fluid coming out. I tried bleeding the brakes using two people, one pumping the brakes while I let the fluid out at the caliper until no air bubbles noticed. The hole in the reservoir cap is pretty clear I didn't notice this before, I assumed there was some type of diaphragm to keep the fluid in but I can see through from the top to bottom. I saw a thread talking about having air in the system causing fluid to come out so pressure bleeding would help but with the hole in the cap does it help?

    Any suggestions..

  3. #3
    Seasoned Citizen NAZ's Avatar
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    Do yourself a favor and get rid of that reservoir as it's open to atmosphere. Why is that a problem? Because your brake fluid will absorb moisture from the air. Why is that a problem? Because the moisture will corrode your steel parts and significantly lower your fluid's boiling point which can create gas (air) pockets throughout the system and act the same as if you had air trapped in the system.

    Use solo bleeders (they have a check valve) and a Mityvac to bleed your brakes by yourself. Same principle as pressure bleeding but you pull a vacuum at the bleeder valve and use 14 PSI atmospheric pressure to push the fluid out the bleeder.
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    Itchief's Avatar
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    Factory Five Racing now sells an improved reservoir that uses a vented cap and a rubber diaphragm the cost is about $90

    I used the vacuum bleeding method and used a wrap of Teflon tape on the bleeder threads to stop air leaking around the threads

    Rick
    #8475 Complete Kit Delivered Nov 2014, started Nov 2015, Street Legal Apr 2016, Paint and Interior Completed Aug 2017, 390 BBF, March accessory kit, MSD Atomic EFI and Ready to run, TKO 500 with MidShift kit, hooker headers, 3 link, track lock with 3.55, sway bars, power steering, wipers, heater

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    Senior Member CraigS's Avatar
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    Mine are CNC but the principle will be the same. Find hose, radiator or whatever that fits the reservoir, then go to the hardware store and cobble up stuff to go from that to a 1/4" or so hose to connect to pressure.
    Pressure Bleeder by craig stuard, on Flickr
    You only need 5 to absolute max of 10# pressure so a fish tank pump works fine.
    FFR MkII, 408W, Tremec TKO 500, 2015 IRS, DA QA1s, Forte front bar, APE hardtop.

  6. #6
    Senior Member DavidW's Avatar
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    I talked to Factory Five and they are sending me new reservoir caps that don't have holes. I'm not sure what I'm getting into here, guessing that would make it a closed system different than what I'm used to. I looked into getting those CNC reservoirs but it looks like they have closed shop and I cant find those on the internet anywhere. I see the new FFR reservoirs have a diaphragm, anyone have those and like them?

  7. #7
    Boydster's Avatar
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    Hey Dave. I have 3 of the older F5 reservoirs that do not have holes in the lids, nor diaphragms. Let me know if you'd like one or several to work with or keep or whatever.
    ---Boyd---
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  8. #8
    Senior Member DavidW's Avatar
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    Quote Originally Posted by Boydster View Post
    Hey Dave. I have 3 of the older F5 reservoirs that do not have holes in the lids, nor diaphragms. Let me know if you'd like one or several to work with or keep or whatever.
    Thanks but I may get some different reservoirs with the diaphragm.

  9. #9
    Senior Member BEAR-AvHistory's Avatar
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    Quote Originally Posted by DavidW View Post
    I talked to Factory Five and they are sending me new reservoir caps that don't have holes. I'm not sure what I'm getting into here, guessing that would make it a closed system different than what I'm used to. I looked into getting those CNC reservoirs but it looks like they have closed shop and I cant find those on the internet anywhere. I see the new FFR reservoirs have a diaphragm, anyone have those and like them?
    Had to drill a small hole in mine to get proper braking function.
    Kevin
    MKIV #8234
    Coyote '13/TKO-600
    Delivered 2/7/14 - Plate "COYOTE NC1965" 3/25/15

  10. #10
    Papa's Avatar
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    With the popular CNC reservoirs no longer available, here is a great option at about the same cost:

    https://www.scottshotrods.com/remote-reservoirs/
    There are 10 types of people in this world;
    those who understand binary and those who don't.

    My Build Thread: http://thefactoryfiveforum.com/showt...ter-Build-9754

  11. #11
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    they have a few left of the triple CNC reservoirs. just ordered mine a couple days ago . . . . https://www.kartek.com . . . . shipping is twice what it should be, but they have them so they set the price

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