Fuel Tank Filler Neck Buyer's Guide
- A fuel tank filler neck is part of your vehicle’s fuel system. It connects to both the fuel tank and your fuel filler inlet, making it easy for you to refill your fuel.
- Usually, a fuel filler neck is fastened to the fuel filler inlet with metal screws. On the other hand, it connects to your fuel tank and is secured with a rubber hose and clamps.
- Rust, moisture, road salts, and the harsh environment under the hood can form cracks and holes on your fuel filler neck.
- You’ll know when it’s time to replace your fuel tank filler neck when you have fuel spills, unusually strong fuel smells, decreased mileage, and when your check engine light comes on.
- OE replacement fuel filler necks here on CarParts.com work just as well, if not better, than their OEM counterparts. They’re sturdy and built to last but won’t break your bank. You can get a replacement filler neck for $15 to $200, depending on your vehicle’s year, make, and model.
It’s quite frustrating to find gas or fuel leaks in your car because it keeps you from maximizing your vehicle’s fuel mileage. Not to mention, fuel vapor leaks are serious fire hazards that can put you and your family at risk. Most of the time, fuel and fuel vapor leaks happen because your fuel tank has been damaged or punctured. However, sometimes, the leaks are caused by damage to other parts of your vehicle’s fuel system.
The fuel system includes your fuel tank, fuel cap, and your fuel tank filler neck, among others. While the fuel tank is very much important because it contains your vehicle’s fuel, your fuel filler neck makes sure that fuel gets into your tank in the first place. What is this part and how would you know when to replace it if it gets damaged? Below are some important things you need to know before replacing your fuel tank filler neck.
What is a fuel tank filler neck?
A vehicle’s fuel tank filler neck is a tube that attaches to your fuel tank and your fuel filler inlet. This is the part where you put the nozzle of a gas station pump when you refill your fuel tank.
The filler neck makes refueling easy and efficient. It also keeps debris, liquids, and other contaminants from getting inside your fuel tank and in turn, your engine. Aside from that, your car’s fuel tank filler neck and cap make sure that highly flammable gas fumes won’t escape from the fuel tank and into the atmosphere.
How does a fuel filler neck work?
A fuel filler neck is made of lightweight aluminum or other metals. A fuel filler neck kit, on the other hand, usually comes in a set, complete with its own hardware for easy installation. It’s built to withstand corrosion, heat, pressure, and constant vibration from the engine and the surrounding mechanisms. But despite being built to face all sorts of conditions, it’s still very much prone to damage, weathering, and leaks.
On one end, your fuel tank filler neck is bolted onto your vehicle’s quarter panel with steel screws. However, depending on your car’s year, model, and make, they can also be attached to the rear filler panel or your bumper.
On the other end, it connects to your vehicle’s fuel tank and is secured by a rubber hose with clamps. Sometimes, the filler neck can be soldered onto the fuel tank. As an added precaution, some filler necks are equipped with one-way valves that prevent objects from getting inside the fuel tank.
What causes damage to a fuel tank filler neck?
Rust and significant denting can affect your fuel filler neck’s performance. Filler necks are usually made to last the entire lifetime of a vehicle but they’re still prone to damage. Not to mention, filler necks are constantly exposed to constant heat, pressure, and vibration under the hood. Moisture and road salts can also damage the surface of a filler neck.
How to spot a faulty fuel tank filler neck
A simple visual inspection from time to time might help you spot cracks or holes in your fuel system and your fuel filler neck before they get worse. Leaving those holes and rusted spots on your filler neck is extremely dangerous. By doing so, you let a fire hazard compromise you and your family’s safety.
However, there are also other indications of a faulty fuel tank filler neck other than visible cracks and holes. Below are some signs that you’re due for a fuel tank filler neck repair soon.
Not getting enough fuel mileage
Leaks drain your fuel faster than you can use it. A sudden change in your vehicle’s fuel mileage is something that you should look out for. Not only does it point toward a leak in your fuel filler neck but there may be other issues in your fuel line that you have yet to address.
Do you notice leaks at the side of your vehicle while you’re filling up your tank? Fuel leaks on the side of your vehicle where your filler neck is located is a clear indication that there is damage to your filler neck or fuel line somewhere. Regardless if it’s an issue with your filler neck or not, you need to address fuel leaks right away before they develop into a safety hazard.
Strong fuel smells
You know your car’s usual, faint fuel smell more than anyone. If the fuel smell doesn’t go away that easily, or if it gets more intense, there might be a leak. Fumes can seep through the cracks or holes in your filler neck and might cause an explosion.
Leaking fuel vapors will also affect your vehicle’s EVAP system (Evaporative Emission control system). This system is responsible for keeping fuel or gas from going into the atmosphere.
Check engine light is on
Your EVAP system keeps vapors from entering the atmosphere by catching and re-routing them back into the fuel system.
If there are leaks or problems in the fuel system, the EVAP system turns the check engine light on. When that happens, you’ll need to scan for the trouble codes and get to the bottom of it immediately.
This time, it’s not just a safety hazard. Problems along your fuel line and especially with your fuel tank filler neck won’t look good on your next OBD II plug-in emissions test.
How much is an OE replacement fuel tank filler neck?
An OE replacement fuel tank filler neck works just as well as an OEM part. An aftermarket fuel filler neck’s features are optimized so they can perform better than their OEM counterparts. They’re basically built to last but won’t break your bank.
Getting a replacement fuel filler neck here at CarParts.com can cost you anywhere from $15 to $200. While some are sold individually, some fuel filler neck replacements are included in a set along with replacement fuel tanks.
To easily find the OE replacement fuel tank filler neck that you need, you can use our vehicle selector tool. Just type in your car’s year, make, and model and you’ll find a variety of durable filler neck replacements for your vehicle.