How to Make a Temporary Gas Cap

by Susan Maddocks
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pumping gas image by Mat Hayward from

You have lost your gas cap and need something to cover your car's gas tank to insure gas fumes don't escape, leading to air pollution, and your gas does not evaporate at a quicker rate. There are at least three steps you can take, depending on where you are and what resources you have when you discover your gas cap is missing.

Step 1

Buy a temporary gas cap at your car dealership. Be sure to get the right type and make sure it fits properly.

Step 2

Tear off a piece of aluminum foil large enough to cover your gas tank opening. Place it over the gas tank opening. Secure with a heavy-duty rubber band.

Step 3

Ask the attendant at the gas station for a spare cap. Many attendants keep the caps that have been left behind.

Step 4

Place a thick rag or a thick washcloth around the gas opening and secure tightly with a heavy-duty rubber band.

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