Search
Select the dictionary language
Filler cap
01
the lid on a vehicle's fuel tank used to seal the opening
What is a "filler cap"?
A filler cap is a cover that seals the opening where fuel is added to a vehicle's tank. It is usually located on the side of the car, often near the rear, and can be twisted or popped open to allow access for refueling. The cap helps prevent fuel from spilling out and keeps dirt and debris from entering the tank. It also helps maintain proper pressure within the fuel system. Filler caps may have a safety feature to prevent the tank from overfilling and are often designed to lock to prevent tampering.
Examples
I need to open the filler cap on my car to refuel it.
Make sure to tighten the filler cap securely after filling up the tank.
