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  1. #1
    Established Member Two Rings
    Join Date
    Nov 06 2021
    AZ Member #
    638670
    Location
    Victor ID

    034 Motor Sport Silicone MAF Hose

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    I purchased a silicone MAF hose since my OEM plastic hose cracked. The new silicone hose doesn't have PCV connection like stock hoes. 034 says cap the PCV connection. What do I cap the PCV connection with?
    01 B5 S4 Avant
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  2. #2
    Veteran Member Four Rings belms4's Avatar
    Join Date
    Apr 17 2019
    AZ Member #
    475034
    My Garage
    2000 silver S4, 2001 imola S4, 2002 Avant nogaro RS4 conversion
    Location
    Denver, CO

    Just a rubber cap with a hose clamp around the neck to keep it in place would be fine. O'Reilly or Autozone sometimes have little assorted packs of rubber caps. Hardware store might too. If you really can't find one, then measure the size you need and look online. Silicone would be fine too... whatever won't leak, has enough flexibility to fit, and won't crumble to pieces in a couple months. Don't overthink it too much :)

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  3. #3
    Veteran Member Four Rings CELison's Avatar
    Join Date
    Feb 23 2010
    AZ Member #
    55053
    Location
    Emmaus Pa

    I would cap it at the PCV collector. Like said above, any auto parts store will have an assortment of rubber caps.
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  4. #4
    Veteran Member Four Rings ShelbyM3's Avatar
    Join Date
    Feb 05 2007
    AZ Member #
    15417
    My Garage
    Alpaca 2002 Allroad 2.7T Auto 3rd Row, Avus Silver Oxblood 2003 S8, Silver Metallic 2004 Allroad V8
    Location
    Portland, OR

    Something like this https://www.amazon.com/102-Assorted-...dDbGljaz10cnVl


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  5. #5
    Established Member Two Rings
    Join Date
    Nov 06 2021
    AZ Member #
    638670
    Location
    Victor ID

    Great, I will head to the auto parts store and see what PCV caps they have. Essentially this is a suction pump delete to MAF hose, I don't have to code anything out do I?
    01 B5 S4 Avant
    Sold 02 C5 S6 Avant
    Sold 01 B5 S4 Avant 6 Speed Stage II
    Sold A3 TDI

  6. #6
    Veteran Member Four Rings belms4's Avatar
    Join Date
    Apr 17 2019
    AZ Member #
    475034
    My Garage
    2000 silver S4, 2001 imola S4, 2002 Avant nogaro RS4 conversion
    Location
    Denver, CO

    Quote Originally Posted by alpine4 View Post
    Great, I will head to the auto parts store and see what PCV caps they have. Essentially this is a suction pump delete to MAF hose, I don't have to code anything out do I?
    Right, you'll be fine without any other changes. It was an oddball extra brake vacuum line they added I think just to 2002 models that really did nothing but add needless complexity. Safe to delete without issues or side effects.

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