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Bay Ute tank breathing system

Discussion in 'Fuel System & Electrics' started by Wayne murray, Sep 15, 2019.

  1. Wayne murray

    Wayne murray Well-Known Member

    Messages:
    3,132
    Location:
    Seven hills
    Since I have had my 72 DC Ute,I've been looking into the breathing system(venting) for the fuel tank. I had most of the components for the breather system I wasn't 100% sure how they all went together,but had a rough idea how it went. In all the time looking into the Ute breather system,with photos of other people's ute and information from other KC member I discovered that nearly all of them where different and incorrect.
    Why are they all different and incorrect is that over the years rubber perishes with age and being in a bad environment with fuel ,they dry out and crack. Most of these commercial vehicles where fixed by owners or mechanics quickly as possible to keep there business running. Also that as they where being fixed some components weren't easily obtained,so what was available was used. The main culprit was Fuel Tank Breather T Piece for VW pickup crew cab orig. VW NOS 261201413 which is Ute pacific part,which was substituted for Fuel Tank Breather T piece for VW T2 Bay 1967 to 1979 Part No#211201405 (image below)which is for a kombi van. Therefore the metal pipe work was modified to suit the new rubber component and make it work with what they had.
    [​IMG]
    So from the photos,information I received from KC members and my own parts that I had I've been able to but my 72 DC ute system together. I also noticed that my 76 SC ute was also all over the place with it's fuel tank breather system,so I decided to change that to what I think was correct. Photo of main components that you may need,depends on what you have already.

    IMG_20190914_122122.jpg
    List of what you may need:
    2 of 1/4" (6.35 mm) metal brake line at 315 mm long
    2 of 1/4 fuel hose 3" or 75 mm long
    1 of Fuel Tank Breather T Piece for VW pickup crew cab orig. VW NOS 261201413
    (I say it is more like a bent Y)

    upload_2019-9-15_19-13-38.jpeg
    1 x 3/16" (4.75 mm) metal brake line 1600 mm long bent to shape to suit. I have a copy of an original pipe.If you need I can copy one for you. Important note: It has a upwards facing horse shoe bend in it as it goes over the right side ute chassis rail . There is also a metal clip spot welded onto left side ute chassis rail for it to clip into.Hard to detail shape of this pipe.!
    1 of 3.5 mm id vacuum hose x 7.5 mm od 3" 75 mm long. This may vary due to the shape of long metal brake line,how things line up.
    hose clamps of you choice and amount to suit you.
    cable ties
    1/4 " fuel line slipped over the 3/16" brake line to protect it against chassis rails and cable ties in place.
    This is what I had started with in my 76 Single Cab ute ,I'm glad I did change this over as one of the hoses from the tank was split. IMG_20190914_122441.jpg IMG_20190914_122514.jpg IMG_20190914_122544.jpg
     
    Last edited: Sep 15, 2019
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  2. Wayne murray

    Wayne murray Well-Known Member

    Messages:
    3,132
    Location:
    Seven hills
    This is know what my 76 Single cab fuel tank breather system looks like,this set up is what I think is correct for Bay window Utes (single and double ) from 74 on to 78 or 79 when production stopped. This fuel tank is from a 76 fuel inject kombi.
    IMG_20190914_134701.jpg IMG_20190914_134715.jpg IMG_20190914_134735.jpg IMG_20190914_135334.jpg IMG_20190914_135352.jpg IMG_20190914_135427.jpg
    IMG_20190914_140011.jpg IMG_20190914_140028.jpg
     
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  3. Wayne murray

    Wayne murray Well-Known Member

    Messages:
    3,132
    Location:
    Seven hills
    This set up is for a 72 -73 Ute (single or double) fuel tank breather system. There are two main difference.
    1) The earlier 72 tank has a larger 14 mm breather pipe which comes from the center of tank and comes out in the fuel filler inlet
    2) The smaller breather pipe comes out left side of the fuel filler (as you face it or towards the rear of the car) area behind the flap. Where the later models 74>there is a small pipe welded to inside body frame near the right side vent closes to the fuel filler.
    446.jpg 447.jpg 450.jpg 452.jpg

    The earlier bay Utes 68-71 I don't know how their fuel tank breather system goes. The tank has a single 8mm pipe coming out of the tank but where the hose root is don't know.
     
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  4. David H

    David H Well-Known Member

    Messages:
    5,205
    Location:
    newcastle
    Great resource Wayne:). Thanks for posting with so much information:cool:.
    Cheers
     
  5. Mordred

    Mordred Super Moderator Staff Member

    Messages:
    2,840
    Location:
    Penna, Hobart
    Great pics and resource there. As you say it is very hard to find anything on them anywhere.

    Adrian
     
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  6. Whitie

    Whitie Well-Known Member

    Messages:
    207
    Location:
    Warriewood
    Very interesting info Wayne, I'll have a closer look at our SC setup, could be perished also, cheers Tony
     
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