Question about 1998 Chevrolet K2500

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Original gas tank replaced because of holes. New

Original gas tank replaced because of holes. New gas tank imploded after three days. 2nd new gas tank has done the same thing after four days.

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  • deonne Jun 30, 2009

    No, nothing altered. Could the gas cap have gone bad? Is there a vent hose that I can check?

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  • Master
  • 1,185 Answers

It sounds like the new gas tanks do not have a breather fitted to them.

As you remove gas from the tank it needs to be replaced with air if not it creates a vacuum and natures way of filling a vacuum it to compress the space it is in

Fill a plastic soda bottle with fairly hot water , give it a minute then pour the water out and quickly screw the top on , watch the effect , that is your gas tank

There is either a metal or rubber tube or even a vent in the filler cap to allow air in

You did something to alter that ?

Posted on Jun 30, 2009

  • Tom
    Tom Jun 30, 2009

    If your tank is fitted with a breather tube it will be on the top of the tank and will be located where it can draw air but not water.



    If you have changed the tank three times were the last two new and the tube opening was sealed for transit purposes.



    Do you still have the original tank to check it against ?, was there a tube fitted to that one



    I know that some filler caps are fitted with breathers which allow air in but stop fumes coming out







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