Katerina Swanson
Removing the fuel tank from a 1965 Chevy Impala SS is a complex task. It involves removing bolts and tank straps, and it may be necessary to use a siphon ball hose to empty the tank first. When re-assembling, it's recommended to put anti-seize on the bolt threads.
How to replace 1965 Impala fuel tank removal
| Characteristics | Values |
|---|---|
| Tank strap bolts | 15mm |
| Tank strap bolts | Soak overnight with PB Blaster or Kroil |
| Tank strap bolts | Back out a little until you feel resistance, then turn it back in a few turns |
| Tank strap bolts | Pull to remove the tank |
| Tank removal | Use the two bolts at the front of the straps |
| Tank removal | Remove the 'rock shields' to get to the front bolts |
| Tank removal | Push the front bolts, straps and tank straight up and tighten the bolts |
| Tank removal | Let the tank 'hinge down' on bolts that pass thru the rear of the straps |
| Tank removal | Slide the tank forward on the floor |
| Tank removal | Lift the straps up out of the way for a moment while you slide the tank out under the rear of the car |
| Re-assembling | Put anti-seize on the bolt threads |
| Re-assembling | Hunt for a replacement tank depending on where your leak is |
| Re-assembling | Try repair on top of the tank |
| Re-assembling | Replace the tank if the leak is on the sides or bottom |
| Re-assembling | Use a siphon ball hose setup to empty the tank |
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What You'll Learn
Removing the bolts
To remove the bolts, soak them overnight with PB Blaster or Kroil. Back out the bolt a little until you feel resistance, then turn it back in a few turns. Keep doing this and you should be able to remove them. These bolts are at the front of the tank straps and the head is 15mm. Pull those and the tank strap just swings down to remove the tank.
It is much easier to leave the two rear cross-strap hanger bolts alone and drop the tank by using the two bolts at the front of the straps. It is a lot easier to push the front bolts, straps and tank straight up and tighten the bolts than to get the rear two threaded through the frame while wrestling with the tank. Using the front bolts lets the tank hinge down on bolts that pass through the rear of the straps, then slide the tank forward on the floor, lift the straps up out of the way for a moment while you slide the tank out under the rear of the car.
When reassembling, put anti-seize on the bolt threads. You will be glad you did if you have to remove the tank again.
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Using a siphon ball hose
To replace the fuel tank of a 1965 Impala, you will need to remove the bolts at the front of the tank straps. These bolts are 15mm. Soak the bolts overnight with PB Blaster or Kroil. Back out the bolt a little until you feel resistance, then turn it back in a few turns. Keep doing this and you should be able to remove them.
When reassembling, put anti-seize on the bolt threads. You can also try using a siphon ball hose setup to remove the fuel. These are available from Walmart for $4. Using a siphon ball hose is a good way to remove the fuel from the tank before removing it. Simply insert the hose into the tank and suck on the end to start the siphoning process. Once the fuel is flowing, you can direct it into a container to catch it. Make sure you are in a well-ventilated area when doing this and take the appropriate safety precautions.
It is much easier to leave the rear cross-strap hanger bolts alone and drop the tank by using the bolts at the front of the straps. Push the front bolts, straps and tank straight up and tighten the bolts. This lets the tank 'hinge down' on bolts that pass through the rear of the straps, then slide the tank forward on the floor. Lift the straps up and out of the way while you slide the tank out from under the rear of the car.
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Removing the tank strap
To remove the tank strap, you need to pull the bolts at the front of the tank straps. The head should be 15mm. Soak the bolts overnight with PB Blaster or Kroil. Back out the bolt a little until you feel resistance, then turn it back in a few turns. Keep doing this and you should be able to remove them. Once the bolts are removed, the tank strap will just swing down.
It's much easier to leave the two rear cross-strap hanger bolts alone and drop the tank by using the two bolts at the front of the straps. This lets the tank 'hinge down' on bolts that pass through the rear of the straps, then slide the tank forward on the floor, lift the straps up and out of the way while you slide the tank out under the rear of the car.
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Re-assembling the tank
When re-assembling the tank, put anti-seize on the bolt threads. This will make it easier if you need to remove the tank again.
It is easier to leave the two rear cross-strap hanger bolts alone and drop the tank by using the two bolts at the front of the straps. Push the front bolts, straps and tank straight up and tighten the bolts. This lets the tank 'hinge down' on bolts that pass through the rear of the straps. Then, slide the tank forward on the floor, lift the straps up and out of the way, and slide the tank out under the rear of the car.
To install the tank, reverse the process.
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Accessing the fuel line connections
To access the fuel line connections, it is recommended to leave the two rear cross-strap hanger bolts alone and drop the tank by using the two bolts at the front of the straps. This will allow you to push the front bolts, straps and tank straight up and tighten the bolts, rather than struggling to get the rear two threaded through the frame while wrestling with the tank.
The bolts at the front of the tank straps are 15mm. Pulling these will allow the tank strap to swing down, enabling you to remove the tank. It is recommended to soak these bolts overnight with PB Blaster or Kroil. Back out the bolt a little until you feel resistance, then turn it back in a few turns. Keep doing this and you should be able to remove them.
When reassembling, put anti-seize on the bolt threads. This will make it easier if you need to remove the tank again.
One user recommends using a siphon ball hose setup to remove fuel from the tank before attempting to remove it. This can be purchased for a low cost from Walmart.
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Frequently asked questions
You can remove the fuel tank by pulling the bolts at the front of the tank straps. Soak the bolts overnight with PB Blaster or Kroil, then back out the bolt until you feel resistance. Turn it back in a few turns and keep doing this until you can remove them.
The bolts are 15mm.
It is easier to leave the rear cross-strap hanger bolts alone and drop the tank by using the bolts at the front of the straps.
If the clamp nuts break, the nut will just spin. You will need to replace the tank if the leak is on the sides or bottom.
Put anti-seize on the bolt threads. This will make it easier if you need to remove the tank again.
