TUBE question on 1989 240GL

Discussion in 'Volvo 240' started by Pete, Jun 23, 2004.

  1. Pete

    Pete Guest

    I was cleaning up my air intake (changing filter and all). I noticed at the
    bottom of the airbox a tube that goes from the airbox to the opposite side
    of the engine into the exhaust. What is that tube doing. Isnt it bringing in
    HOT air from the exhaust to the filter box? Can I remove it and plug up that
    hole bye the header?

    Pete, Jun 23, 2004
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  2. Pete

    Mike F Guest

    Yes that's what it's for. That's important (some times) when the
    temperature goes below freezing. There's a sensor and flap inside the
    airbox that switches between that hot air source and cold air from in
    front of the radiator. It's a good idea to check the function of that
    sensor as it often fails. Some cars seem to have no problem without
    that hose no matter how cold it gets, and if you live where is rarely
    falls below freezing then you can leave it off too. Make sure that the
    flap inside the airbox can't switch to the position to block off the
    other input if you disconnect the hose and plug that hole.

    Mike F.
    Thornhill (near Toronto), Ont.

    NOTE: new address!!
    Replace tt with t (twice!) and remove parentheses to email me directly.
    (But I check the newsgroup more often than this email address.)
    Mike F, Jun 23, 2004
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