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Collapse Vacuum Hose

Discussion in '308/328' started by miketuason, Mar 1, 2022.

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  1. miketuason

    miketuason F1 World Champ
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    Feb 24, 2006
    15,809
    Cerritos, CA.
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    Mike
    #1 miketuason, Mar 1, 2022
    I noticed yesterday the large 19mm ID vacuum hose that goes from the AAV to the cold star valve is collapse from the vacuum on my QV. I remember when I installed that hose several years ago it was very stiff, I guess it lost its strength so today I went to Deering Industries as they sell this coil to go inside the hose to prevent from collapsing. Normally I would just buy a new vacuum hose but the problem is, it’s so hard to find a cloth braided in 19mm, Newco has one but it’s like $49/foot. Anyway this coil only cost $10 and it’s design for this purpose and I got to reuse my cloth braided hose.

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    Saabguy, Jbrauer, dinoart and 3 others like this.
  2. Sigmacars

    Sigmacars Formula 3
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    Jul 19, 2006
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    #2 Sigmacars, Mar 2, 2022
    What where the symptoms for you to find this
     
  3. Lawrence Coppari

    Lawrence Coppari Formula 3

    Apr 29, 2002
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    Kingsport, TN
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    Lawrence A. Coppari
    #3 Lawrence Coppari, Mar 2, 2022
    Great solution.
     
  4. moysiuan

    moysiuan F1 Rookie
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    #4 moysiuan, Mar 2, 2022
    I just replaced all my hoses with those from Newco, they are good quality Continental made and look correct. They are a somewhat thinner wall than the orginals, so I will kep an eye out to see if the heat cycling causes them to kink or collapse from the vacuum. Your walls look about the same thickness as the Newco ones.
     
  5. miketuason

    miketuason F1 World Champ
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    #5 miketuason, Mar 2, 2022
    Actually there were no symptoms as it still idle at around 2k rpm sometimes 2,500 when cold the settles at 1k rpm after a few minutes so maybe it’s not 100% close when collapse, it’s mostly visual when I noticed it.
     
  6. miketuason

    miketuason F1 World Champ
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    #6 miketuason, Mar 2, 2022
  7. moysiuan

    moysiuan F1 Rookie
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    #7 moysiuan, Mar 3, 2022
    Yes, I did the same thing, I used a smaller diameter rubber hose piece that fit inside the main hose. Fast cold idle now at about 1,500 rpm for me too.
     
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  8. waymar

    waymar Formula 3

    Sep 2, 2008
    1,354
    Northeast, PA - USA
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    Wayne Martin
    #8 waymar, Mar 3, 2022
    I used an old 2V injector bushing. Then after a while I removed the whole device. Just uses the thermo-time-switch now. There are choices for the TTS temp/time.....
     
  9. Saabguy

    Saabguy Formula 3

    Mar 28, 2012
    1,785
    Shreveport, LA
    #9 Saabguy, Mar 4, 2022
    Ya know, I always thought that the spring solution had to exist out in the wild somewhere. Thanks!

     
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