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How to Choose the Right Replacement Gas Cap

A gas cap seems insignificant as far as automobile parts go, but it's a key part of your automobile's emission control system. Choosing the right replacement cap helps everyone breathe easier.

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    Difficulty:
    Easy

    Instructions

    Things You'll Need

    • Automotive Repair Manual
    • Gas Caps
      • 1

        Bring your car's year, make, and model with you to the auto parts store.

      • 2

        Check a reference manual or a supply store's computer database for the type of cap your car needs.

      • 3

        Select the type of gas cap specified. Don't substitute another kind, even if it looks and feels OK.

    Tips & Warnings

    • Don't drive around without a gas cap - it's unsafe for you, your car, and the environment.

    • The closed-fuel system of a new car reduces pollution by forcing vapors into a recovery canister. Pick the wrong cap, and you'll end up with vapors escaping. A snug feel is not enough. Even a gas cap that goes on readily and doesn't wiggle can have an imperfect seal.

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    Comments

    • shellydintexas Aug 22, 2008
      Does it affect the gas mileage? Doese it evaporate if it's not the right one?
    • shellydintexas Aug 22, 2008
      Does it affect the gas mileage? Doese it evaporate if it's not the right one?

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