Results 1 to 8 of 8

Thread: fuel line breather hose why so long?

  1. #1
    Join Date
    Nov 2005
    Location
    Blackpool
    Posts
    79

    Default fuel line breather hose why so long?

    im just replacing my fuel lines from the tank and i see there are 3 going the length of the car, with one just ending in the engine bay unconnected, im presuming this is a breather hose? why is it so long? i dont want to have to replace the whole length if i dont need to, can I shorten it?

    chris

  2. #2
    Join Date
    Dec 2003
    Posts
    868

    Default Sounds like....

    that is the line that is supposed to go to the charcoal cannister in the engine bay

    I'm not entirely familiar with M20 set up though

    Quote Originally Posted by cschollum
    im just replacing my fuel lines from the tank and i see there are 3 going the length of the car, with one just ending in the engine bay unconnected, im presuming this is a breather hose? why is it so long? i dont want to have to replace the whole length if i dont need to, can I shorten it?

    chris

  3. #3
    Join Date
    Dec 2003
    Posts
    868

    Default

    The diagram for the charcoal cannister is in a different place. The lone line from the tank picture to the canister is probably the third line you are seeing

    http://www.realoem.com/bmw/showparts...89&hg=13&fg=15

    Quote Originally Posted by cschollum
    thanks, in addition ive looked at the etk, and it shows only 2 lines , inlet and return, so as i havent yet removed the tank i dont know if the 3rd hose is connected anywhere, but if as you say its for a carbon filter and mines before that time, looks like i only need replace 2 of the lines

  4. #4
    Join Date
    Dec 2003
    Posts
    868

    Default

    Do you have the vacuum operated valve that is Part #1 in that picture?....which would subsequently be connected to your intake manifold? This allows the fuel tank to vent at ambient air pressure and fuel vapors pass through this line. The air is sent to the intake manifold under vacuum pressure and mixed in as part of the air charge.

    When the engine is not running and the intake is not creating vacuum, fuel vapors pass through the tank vent line and collect in the charcoal cannister. They are sucked in with the air charge on the next engine run and burned. This is a pollution control.

    I'm not familiar with the M20 at all so I cannot recall exactly what is under the hood.

    Quote Originally Posted by cschollum
    well i dont have the charcoal system, what does it do?

  5. #5
    Join Date
    Dec 2003
    Location
    Eastern Tennessee USi
    Posts
    14,727

    Default

    does it smell like gas if you sniff it? (dont suck it like a straw)
    95 E34 530I V2.37
    ===========
    Those who make peaceful revolution impossible will make violent revolution inevitable.

    John F. Kennedy

  6. #6
    Join Date
    Jul 2005
    Location
    New York
    Posts
    1,750

    Default

    light a match and see what happens?


    Quote Originally Posted by Alexlind123
    You're my hero.

  7. #7
    Join Date
    Jun 2005
    Location
    Cleveland, OH
    Posts
    1,279

    Default

    Quote Originally Posted by 632 Regal
    does it smell like gas if you sniff it? (dont suck it like a straw)
    I would suggest holding a match or a candle up to is so you can see what you are doing...
    If it cannot be fixed by the dremel or ducktape.. get out the sledge...
    --------------------------------------------------------------------
    I miss my e34

  8. #8
    Join Date
    Dec 2003
    Location
    Eastern Tennessee USi
    Posts
    14,727

    Default

    no way dude! that could be dangerous...melting the rubber could drip onto the valve covers or something.
    95 E34 530I V2.37
    ===========
    Those who make peaceful revolution impossible will make violent revolution inevitable.

    John F. Kennedy

Similar Threads

  1. Breather hose question
    By rockin1978TA in forum 5 Series BMW
    Replies: 3
    Last Post: 11-23-2009, 01:36 PM
  2. Is it safe to use fuel line as heater hose?
    By Anton CH. in forum 5 Series BMW
    Replies: 10
    Last Post: 04-30-2007, 06:49 PM
  3. valve cover breather hose: hard?
    By schnell944 in forum 5 Series BMW
    Replies: 4
    Last Post: 12-09-2006, 12:09 AM
  4. M60 Intake reseal update: fuel line rubber hose clamps
    By Alpinewhite in forum 5 Series BMW
    Replies: 3
    Last Post: 11-19-2006, 09:37 PM
  5. breather hose - a trick to installation?
    By panzershreck in forum 5 Series BMW
    Replies: 4
    Last Post: 07-15-2004, 11:18 PM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •