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  1. #1
    New Member
    Join Date
    Dec 2012
    Ford 8N

    Default 8N Fuel Tank Vent

    My father just gave me his old 1949 8N and everything is pretty much original with the exception of a carb rebuild a few days ago. Everything works fine and it runs like a top.

    I used the tractor today for about an hour and figured I'd check the gas level before I ran out. When I removed the cap, a lot of pressure was released from the tank.

    I think I remember seeing somewhere that there was a vent on the top of the tank but can not remember where I saw that. Are these tanks vented somewhere? If so, am I looking at pulling the hood to get to the vent or is there a better way?

    This tractor has sat outside since the 60's and only cover with a tarp so most of the bolts are very rusted and removing the hood does not look like it's going to be fun at this point.

  2. #2
    Elite Member
    Join Date
    Sep 2010

    Default Re: 8N Fuel Tank Vent

    The vent is most likely a small 1/16" hole in the fuel cap. It most likely is plugged.

  3. #3
    Old Timer Soundguy's Avatar
    Join Date
    Mar 2002
    Central florida
    ym1700, NH7610S, Ford 8N, 2N, NAA, 660, 850 x2, 541, 950, 941D, 951, 2000, 3000, 4000, 4600, 5000, 740, IH 'C' 'H', CUB, John Deere 'B', allis 'G', case VAC

    Default Re: 8N Fuel Tank Vent

    Quote Originally Posted by MIKE R View Post
    The vent is most likely a small 1/16" hole in the fuel cap. It most likely is plugged.
    The vent is covered by a vented dome. IE.. there is a small hole in the top of the tank.. then there is a dome over that with a hole in it.. so that fuel cannot get out easilly.. or 'stuff' get in easilly.

    2 problems happen.

    1, mud daubers clog them.. or 2, tank sealer / coatings plug them.

    virtually impossible to unglog the oem vent if sealer got it.

    standard practice is to drill a hole inthe cap big enough to install a pop rivit loosley. IE.. hole big enough so the rivit jiggles.. but small enough that the bulged end cannot pull out...

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