If you've spent any time tinkering with a classic Bug, you probably already know that the 1968 vw beetle gas tank is one of those components that eventually demands some serious attention. Whether you're dealing with a car that's been sitting in a barn for twenty years or a daily driver that's starting to smell a bit too much like a refinery, the fuel system is the heart of the beast. 1968 was actually a pretty big year for the Beetle, marking a lot of transitions in design, and the gas tank wasn't left out of those changes.
Why the 1968 Model is a Bit Different
Before 1968, if you wanted to fill up your Beetle, you had to pop the front hood. It was a quirk that defined the early models, but by the time '68 rolled around, Volkswagen decided to make things a little more convenient for the average driver. They moved the filler neck to the outside of the car on the right-hand side. This meant the 1968 vw beetle gas tank had to be redesigned with a specific neck that connected to that external flap.
This change is a blessing and a curse. It's great for convenience, but it adds a few more failure points, like the rubber filler neck hose that connects the tank to the outside world. If you're smelling raw gas while you're driving or after a fill-up, that rubber boot is usually the first place you should look. They dry rot over time, and a cracked hose can let fumes—or even liquid gas—leak into the trunk area.
Signs Your Tank Is Calling It Quits
You might be wondering if you can get away with just cleaning your old tank or if it's time to toss it and buy a new one. Truth be told, these old metal tanks are prone to internal rust. If your Bug has been sitting with half a tank of gas for a few years, that fuel has likely turned into a nasty varnish, and moisture has probably started eating away at the metal.
One of the clearest signs of trouble is your fuel filter. If you find yourself replacing that little plastic filter every couple of weeks because it's full of fine red dust, your 1968 vw beetle gas tank is rusting from the inside out. You can try to "seal" it with some of those DIY kits, but honestly, with the cost of a fresh replacement tank being relatively affordable these days, it's often better to just start fresh. It saves you the headache of clogged carburetors down the road.
The Fun Part: Swapping It Out
Actually replacing the tank isn't as scary as it sounds. You don't need a lift or a specialized shop to do it. You mostly just need a 13mm socket, some screwdrivers, and a bit of patience. First things first—and I can't stress this enough—make sure the tank is empty. Draining a tank is a messy job, so try to run the car until it's nearly bone dry, or use a hand pump to get the old stuff out.
Once it's empty, you'll see four plates (often called "tank tabs") holding the tank down into the trunk floor. After you unbolt those, you'll need to disconnect the fuel sending unit wires and the fuel line from underneath. On a '68, you also have to deal with that filler neck hose I mentioned earlier. Just loosen the hose clamps, and with a bit of wiggling, the tank should pop right out.
Don't Forget the Sending Unit
While you have the 1968 vw beetle gas tank out of the car, do yourself a favor and look at the sending unit. That's the little floating device that tells your dashboard how much fuel you have left. In my experience, if the tank is old, the sending unit is usually on its last legs too.
The 1968 model uses a specific sending unit that needs to match the gauge on your dash. If you buy a new tank, it usually doesn't come with the sender or the seal, so you'll need to grab those separately. Pro tip: make sure you use a good quality cork or rubber seal and maybe a tiny bit of fuel-resistant sealant. There's nothing more annoying than putting everything back together only to find a slow leak at the top of the tank when you take a sharp turn.
The Importance of the Tank Seal
One thing people often overlook is the large rubber seal that sits between the tank and the body of the car. This isn't just there for padding; it prevents fumes and moisture from getting into the cabin and stops the metal-on-metal rubbing that leads to squeaks and rust. If you're putting in a new 1968 vw beetle gas tank, always buy a fresh seal. They're cheap, and it makes the whole trunk look much cleaner once you're finished.
Cleaning and Maintenance
If your tank is actually in decent shape and you just want to keep it that way, there are a few things you can do. Modern gas, especially the stuff with high ethanol content, is pretty hard on these old systems. Ethanol attracts water, which is the mortal enemy of a steel gas tank.
If you aren't driving your Beetle every day, try to keep the tank full. A full tank leaves less room for condensation to form on the inner walls. Also, using a fuel stabilizer can help keep the gas from turning into gunk during the winter months. It's a small step, but it goes a long way in preserving the life of your fuel system.
Safety First
It feels like a "dad" thing to say, but working on a 1968 vw beetle gas tank requires some common sense safety. Gas fumes are heavier than air and they'll linger in your garage or workspace. Always work in a well-ventilated area, and keep a fire extinguisher nearby just in case.
Also, check your fuel lines while you're at it. Those old braided cloth lines that come on many VWs are notorious for cracking. If you're replacing the tank, you might as well run new rubber fuel lines all the way to the engine. It's cheap insurance against the dreaded VW engine fire.
Wrapping It Up
At the end of the day, dealing with your 1968 vw beetle gas tank is just part of the classic car experience. It's a weekend project that makes a world of difference in how the car runs. There's a certain peace of mind that comes with knowing your fuel is clean and your gas gauge actually works for once.
Once you've got that new tank in and everything hooked up, take it to the gas station, fill it up, and check for leaks one last time. If everything is dry, you're good to go. There's nothing quite like the smell of a vintage VW interior—as long as that smell isn't overpowering raw gasoline! Keep the rubber side down and enjoy the ride.