A vehicle gas cap door mechanism is the part of a vehicle that allows access to a vehicle's gas cap. A gas cap door mechanism consists of a hinge that allows the gas cap door to swing open and closed, the actual gas cap door, and any cables or wires that allow the gas cap door to be opened via push-button control from inside a vehicle. more »

A gas cap is an important part of a vehicle's gasoline tank. Although small in size and cheap in price, a gas cap provides a number of critical functions in regard to gasoline-tank safety and integrity. more »

A gas cap, the plastic or metal cap that secures the entryway into a vehicle's gas tank, is secured in place using a screw-style fitting. To be sure the gas cap is held in place without danger of falling out or becoming loose, most gas caps employ metal or plastic threads that match up to a groove in the fuel tank piping; this thread and groove allow the gas cap to form a secure seal much like a threaded screw holds securely in a wall. Depending on the specific make and model of the vehicle, the gas cap may have enough thread for two or three full rotations when being inserted into the fuel tank piping. Some gas caps also end the threading with a flat series of plastic notches so that the gas cap can be turned with moderate resistance when it has been fully inserted. more »

Use of a locking gas cap protects a vehicle from gasoline theft or fuel system vandalism. A key lock prevents the cap from turning counterclockwise while it is tightly secured over the fuel port. Attempting to take off the gas cap without the key can prove to be more of struggle than a typical vandal or thief will make time for. Just be sure you have the key when you arrive at the gas pump to be able to remove a locking gas cap. more »

Locked gas caps come in various sizes to fit a variety of automobile makes and models. A typical cap costs anywhere from $15 to $25. Having a locked gas cap can prevent gasoline thieves from siphoning your fuel in the middle of the night, but locked gas caps can sometimes be tricky to open even for the cars' owners. more »

Locking gas caps help to prevent fuel theft and tampering, and do a great job at it. Unfortunately, anyone who has bought or restored a salvaged motorcycle, or simply lost their keys, understands the hassle that a locking gas cap can provide. With just a drill and a nail, a locking gas cap can be removed for replacement without the key. more »

Car gas caps are just as susceptible to dirt and grease as anything else on a car. This can make it hard to insert and remove the cap, but perhaps the biggest hazard is the fact that a gunky or dirty gas cap can leave some of that residue behind, which can fall into the gas itself. If that happens often enough, you could go from merely having a dirty gas cap to a plugged gas filter or fuel pump. Replacing those items will cost far more money than simply keeping your gas cap clean. more »

A gas cap is a specially designed cover, normally made of plastic, that fits around the gasoline tank of an engine. It acts as a seal so that gas and fumes do not escape the fuel tank while the engine is in operation. The gas cap works the same on a small engine, like a lawn mower, as it would on a larger fuel system like an automobile. Both are internal combustion systems, and they require a certain amount of pressure in the system to operate properly. Gas caps help maintain the pressure in the greatest source of possible leakage: the fuel tank opening. Gas caps are specifically designed for a particular engine to maintain the proper seal, and even similarly sized gas caps may not function as well on a different type or model of engine. more »

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. more »