Rajan Wilcox
If your 1970 Mustang has a crumbling or rusted fuel filler hose, you may experience poor performance, fuel spillage, and a strong smell of fuel. To resolve these issues, you can replace the fuel filler hose with a new, highly durable and long-lasting one. This process involves loosening the old hose, measuring and cutting the new hose to the correct length, and installing it with the appropriate clamps and gaskets. By following these steps, you can ensure a secure and proper fit for the new fuel filler hose, improving the performance and safety of your vehicle.
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What You'll Learn
How to prepare a new fuel filler hose
To prepare a new fuel filler hose, you will need to place new hose clamps around the new fuel hose. Ensure that the clamps are installed at the proper tightness. You will then need to install the new fuel hose onto the fuel pump, fuel line, or carburettor. Tighten the new hose clamps and secure the hose. Do not use old hose clamps.
If you have a fuel filter, snap the fuel line to the filter and ensure that the connections are tight. Install the mounting bolts to the fuel filler neck. Open the fuel neck door and be sure to tighten the bolts finger tight and then 1/8 turn.
If you are installing all three lines, then you will need to install the vapour line to the charcoal canister and the return line to the fuel tank by snapping the quick disconnect together.
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Installing the fuel filler pipe
To begin, make sure you have a new gasket and put it on before installing the pipe. Once the filler pipe is installed, the hose plants in place and can be tightened down. Reinstall the gas cap, lining up the gasket with the holes.
Next, connect the sending unit and replace the old hose clamp with a new one. You may also want to add some grease to the pipe end to make it easier to work with. It is important to ensure that the hose is securely clamped in place to prevent any fuel leaks.
Finally, check the tightness of the clamps after a week and re-snug them if necessary. This allows the rubber to conform to the shape of the pipe and ensures a tight seal.
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Reinstalling the gas cap
To reinstall the gas cap, you will need to line the gasket up with the holes. You should also grab a new hose clamp to replace the one you took off.
To replace the fuel filler hose, you should first loosen up the new fill hose away from the tank. Find a 1 1/2" OD pipe (galvanized or PVC) to fit your 1 1/2" ID fuel fill. Measure the old fuel fill with a cloth tape on the outside curve and add a couple of inches for "play". Cut the new hose to this new length. Use a heat gun on the hose end or soak it in near-boiling water, then put lithium grease on the pipe end. Work the pipe onto the hose or vice-versa. Clamp one or the other in a cloth-lined vise or bench clamps.
Put double SS hose clamps on either end, reversed so that the bolts will be easily turned at "9 and 3 o'clock". Tighten them loosely. When you put the screw clamps back on, snug them down, then check them in another week and re-snug them. This gives the rubber some time to conform. To get the new hose back on, mush the hose onto the end of the fuel filler tube, then fight it onto the shorter tube from the fuel tank. You can smear some oil on the inside of the hose to help make it slippery, and if the rubber is warm, it will be slightly softer.
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Replacing the hose clamp
Now you have a prepared fuel fill hose with clamps at the ready with slightly "flared" ends. Put double SS hose clamps on either end, reversed so that the bolts will be easily turned at "9 and 3 o'clock". Tighten them loosely. When you put the screw clamps back on, snug them down, then check them in another week and re-snug them. That gives the rubber some time to conform.
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Checking the screw clamps
To check the screw clamps, you should first snug them down. Then, check them again in a week and re-snug them. This gives the rubber time to conform.
You can loosen the new fill hose away from the tank by finding an appropriate 1 1/2" OD pipe (galvanized or PVC) to fit your 1 1/2" ID fuel fill. Measure the old fuel fill with a cloth tape on the outside curve. Add a couple of inches for "play". Cut the new hose to this new length. Use a heat gun on the hose end or soak the hose end in near-boiling water. Put lithium or other light grease on the pipe end. Work the pipe onto the hose or vice-versa. You might want to clamp one or the other in a cloth-lined vise or bench clamps.
Work the hose to a greater "depth" than the fuel fill or the deck fill barbs. Use a circular sweeping motion to evenly stretch the hose end. Put double SS hose clamps on either end, reversed so that the bolts will be easily turned at "9 and 3 o'clock". Tighten them loosely. Now you have a prepared fuel fill hose with clamps at the ready with slightly "flared" ends.
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Frequently asked questions
You will need to buy a new, highly durable, long-lasting fuel tank filler hose. The standard four-inch design is a direct-fit reproduction of the original and requires no special tools for installation. You will also need to buy a new hose clamp.
A new fuel tank filler hose will prevent fuel from spilling out, improve your gas mileage and remove the constant smell of fuel.
You won't need any special tools, but you will need to buy a new hose clamp.
First, you will need to install the fuel filler pipe. The new gasket comes with it, so make sure that you put it on before you put the pipe in. Once you install the filler pipe, your hose plants in place and you will need to tighten them back down.
You can smear some oil on the inside of the hose to help make it slippery. If the rubber is warm (from sitting in the sun) it will be slightly softer.
