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Rear diff breather extension

Discussion in '5th Gen 4Runners (2010-2024)' started by glwood54, May 30, 2020.

  1. May 30, 2020 at 1:37 PM
    #1
    glwood54

    glwood54 [OP] Stop making me buy stuff!

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    Search is coming up empty...is there a definitive thread on extending the rear diff breather on a 5th gen T4R I can look at? I've seen plenty of writeups for Tacomas (did that myself some years back, relocated in the left rear tail light housing), earlier gen T4Rs, etc., but am wondering what location 5th gen owners are selecting to relocate the breather, and whether the consensus is to use a 1-way or 2-way valve, or a filter of some sort...
     
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  2. May 30, 2020 at 1:44 PM
    #2
    nimby

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  3. May 30, 2020 at 2:46 PM
    #3
    glwood54

    glwood54 [OP] Stop making me buy stuff!

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    Thanks, I saw that write up. The idea is fine, just not particularly fond of the $74 price tag for the ARB kit. I seem to remember the components for doing this on my Tacoma were around $12 - $15. I suppose I could buy fuel line, clamps, and the two fittings, and route the line the same way into the engine bay.
     
  4. May 30, 2020 at 4:38 PM
    #4
    Living the dream

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    I did exactly what I did on my Tacoma with pretty much the same parts. I put the end up in the cavity behind the passenger side rear wheel well by the rear light assembly.
     
  5. May 30, 2020 at 5:03 PM
    #5
    kbp810

    kbp810 rebmem wen

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    Same components as Tacoma kit. I ran mine into the rear taillight area.
     
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  6. May 31, 2020 at 12:58 PM
    #6
    glwood54

    glwood54 [OP] Stop making me buy stuff!

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    Did you both do this on your 4Rs? If so, any pics? And by "same parts" and "same components", the same as what, exactly?
     
  7. May 31, 2020 at 1:10 PM
    #7
    kbp810

    kbp810 rebmem wen

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    Yes. I don’t have the part numbers handy; but I’d bought the parts to do an extension for the rear of my Taco, but never got around to doing it before I sold it and bought a 4Runner. I then used those same parts, and did the extension on the rear of my 4Runner.

    A quick google search should get you the part numbers, or for simplicity, just get them in kit form. I removed the short valve on the axle, replaced with the nipple; hooked hose to
    nipple using a worm drive clamp, then ran the hose up towards the body, across to the frame rail, then along the frame rail and up into the taillight. Running it into the interior would be a better long term spot, but this spot was quick and easy, and gets it up way higher than factory. It’s double zip tied to that spot; and also zip tied here and there around the length of the run to secure it well.

    58605967-B014-4E66-AE3E-AA7865CE818F.jpg
     
  8. May 31, 2020 at 1:16 PM
    #8
    glwood54

    glwood54 [OP] Stop making me buy stuff!

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    Thank you, exactly what I was looking for. Do you have a photo further out, that shows your end location? Hard to tell in close. I appreciate the help.
     
  9. May 31, 2020 at 1:36 PM
    #9
    kbp810

    kbp810 rebmem wen

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    Not right at the moment, that’s the only one I took with my phone. That spot is the taillight (with taillight removed). It sits right beneath where the taillight is with it reinstalled.

    roughly where I circled red here

    79C05DE3-6A61-4610-A43B-F494FE5AD5A4.jpg
     
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  10. May 31, 2020 at 2:20 PM
    #10
    MI-FL off roader

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  11. May 31, 2020 at 4:51 PM
    #11
    alittleoff

    alittleoff New Member

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    I'm going a different route by venting the rear axle to the cavity behind the gas filler door.
    I think that it will have a lesser chance of gear oil fumes entering the cabin area.
     
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  12. May 31, 2020 at 5:59 PM
    #12
    MI-FL off roader

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    Never noticed any fumes even on extended trips to PA, Tenn and AZ, but completely understand, as it was definitely one my concerns. I just never liked the stock valve and there isn't room in the filler door for the cheap filter I went with. And if I ever got off camber in some deep water it would be less likely to get inside the storage area. Now if you have passengers or little ones in that area, definite concern. Hope it works out!!
     
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  13. May 31, 2020 at 10:50 PM
    #13
    glwood54

    glwood54 [OP] Stop making me buy stuff!

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    Perfect, thank you. Did you have to drill a hole to get the fuel line into the area behind the tail light?
     
  14. Jun 1, 2020 at 5:34 AM
    #14
    Living the dream

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  15. Jun 1, 2020 at 5:52 AM
    #15
    hergonthegreat

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  16. Jun 1, 2020 at 7:50 AM
    #16
    kbp810

    kbp810 rebmem wen

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    You do not, it is open through to the bottom towards the bumper. Was pretty easy to fish the hose through.
     
  17. Jun 1, 2020 at 9:03 AM
    #17
    glwood54

    glwood54 [OP] Stop making me buy stuff!

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    Good to know, thank you!
     
  18. Jun 1, 2020 at 9:16 AM
    #18
    glwood54

    glwood54 [OP] Stop making me buy stuff!

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  19. Jun 1, 2020 at 9:47 AM
    #19
    hergonthegreat

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    Not sure. But 5 ft should be fine, unless you wanted to run it under the hood right? I mean, the tacoma kit is meant to run it either into a bed cubby or the fuel door anyways. I'm sure you could call and ask for a longer length regardless.

    The only reason I have it is because I had a Taco and I blew out the rear pinion seal due to my diff vent getting plugged. Kept it with the intent to do it on my 4runner.
     
  20. Jun 3, 2020 at 6:53 AM
    #20
    glwood54

    glwood54 [OP] Stop making me buy stuff!

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  21. Jun 3, 2020 at 10:51 AM
    #21
    Living the dream

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    Yes, the breather valve is located on the drivers side of the differential pumpkin. Remember to give a little slack for the articulations of the rear axle. There is a cross member almost right above you can go over. I then went over the spare tire and you can come out right by the cavity for the fuel filler hoses right behind the rear wheel well. I ran it up into that cavity and zipped tied it to one of the other hoses in that cavity. I figured it would be pretty unlikely I would be going into deep enough water as high as the fuel filler door. 5ft. Is just enough with 12”-18” of slack. I used more than one zip tie though, 3 just to keep the line from flapping around and to tie it up inside the cavity to keep it from falling down.
     
  22. Jun 3, 2020 at 2:24 PM
    #22
    glwood54

    glwood54 [OP] Stop making me buy stuff!

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    Would you happen to remember what length of hose you used for your installation?
     
  23. Jun 3, 2020 at 3:09 PM
    #23
    kbp810

    kbp810 rebmem wen

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    I don't remember for sure... but I think I started with an 8ft hose; but then ended trimming off about 2-3 ft. That was being generous with the slack at the axle to account for droop.

    I worked backwards and got the one end secured in the taillight first, then fed the line down and across to the axle; then once it was all ran and secured with zip ties, I trimmed off the excess, then secured it to the axle fitting.
     
  24. Jun 4, 2020 at 5:17 PM
    #24
    glwood54

    glwood54 [OP] Stop making me buy stuff!

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    Sort of hit a brick wall...this seller hasn't responded to my pms regarding placing an order...on to plan B, I guess...

    Maybe he doesn't want to sell to a 4R owner.
     
  25. Jun 5, 2020 at 2:33 PM
    #25
    glwood54

    glwood54 [OP] Stop making me buy stuff!

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    Finally heard from seller. Placed an order today, and they shipped it today. Very impressed. Even had a custom length fuel line.
     
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  26. Jun 9, 2020 at 1:14 PM
    #26
    JB15TE

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    Victory Blitz bumper - Bilstein 6112/5160 - Built Right UCA - 285/70/17 Wildpeak AT3W - RSG Sliders - RCI Front Skid - TRD Grill & Wheels - HID headlights - LED Fogs - Rear Diff Breather Mod
    Do you really need to relocate the elocker and rear ? I installed the rear with the ARB kit and routed to the engine bay. I have read conflicting information regarding the elocker breather. The basis of my question is that some have stated that the elocker shares the same air space as the rear diff so that by relocating the rear diff breather, the elocker does not pose a potential vacuum issue. If submerged, the elocker valve will close, but the open rear diff breather (after relocating) will provide enough relief to prevent a vacuum from occurring. I can't seem to find a definitive answer and was hoping someone here has more mechanical/technical knowledge than I do.
     
  27. Jun 14, 2020 at 1:28 PM
    #27
    glwood54

    glwood54 [OP] Stop making me buy stuff!

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    Got a question for you - in this photo, where you can see the breather end, is it zip tied at the end at all where the breather is, or just wedged in there by those plastic clips?

    The reason I ask is, I got to that point in the install, but didn't really see any good place to zip tie the breather end. Without knowing where to secure the end, I just put the stock breather back on until I can figure it out.
     
    Last edited: Jun 14, 2020
  28. Jun 14, 2020 at 2:51 PM
    #28
    kbp810

    kbp810 rebmem wen

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    I did a double zip tie. I have a zip tie around the end of the hose, and a zip tie looped in around that one... the second zip tie went around one of the plastic clips; then both zip ties were tightened down and ends snipped.
     
  29. Jun 14, 2020 at 3:04 PM
    #29
    glwood54

    glwood54 [OP] Stop making me buy stuff!

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    Gotcha, thanks.

    I'll give it another go tomorrow. I can't believe I gave up so easily...I usually figure something out, one way or another. I should have contacted you sooner...
     
  30. Jun 15, 2020 at 9:00 AM
    #30
    glwood54

    glwood54 [OP] Stop making me buy stuff!

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    All finished. I ended up putting a zip tie through the hose clamp on the breather end, then put that around the plastic clip. Worked fine.

    Thanks for the ideas.

    For reference, the length of fuel line used for this location, with plenty of slack for axle articulation - 5' 8".

    Gary
     
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