There is no official process because a dealer has a lift that will support the tank when it is full, so we will need to use some tricks that I have learned over the years.
Since you are not removing the pump or going to have access to the tank from the top, the easiest and safest way is to siphon it out of the gas tank from the filler neck, into a gas can so you can reuse it. There is a second way which is to unhook the feed line to the engine and connect a rubber line to it and run it to the gas can on the ground. This second way will allow you to use the fuel pump to get the fuel moving. I attached a picture of where this line is so you can decide which way to go. Here are the steps for both.
Engine line siphon
1. Relieve the pressure - process attached.
2. Disconnect the fuel feed pipe from the rail. You will need a fuel line disconnect tool.
3. Find a rubber hose that is large enough to fit over the line coming from the tank
3b. You can go to a parts store and get a quick connect end that fits your fuel line from the tank. Cut it to about a 6 inch length and then connect a rubber line to this and run the other end to a fuel tank on the ground.
4. Reconnect the fuel pump relay so that the fuel pump will energize
5. Turn the key on so that the fuel pump runs and it will pump fuel into your can. Continue this process until the tank is empty. FYI, once there is enough fuel in the gas can on the ground it should create a suction and you will not need to continue to cycle the key
6. Once empty, reconnect your main fuel line and proceed with your fuel tank repair.
Siphon from fuel tank through filler neck (easier way if you have an air compressor)
1. Make sure the vehicle is on a level surface.
2. Remove your gas cap and insert about a 3/4 inch rubber line down into the fuel tank and submerge it in the fuel so it on the bottom of the tank.
3. On the end of the hose that is on the ground that will go into the gas can, poke a hole large enough to fit the end of your air nozzle connected to your air compressor
4. When ready to siphon the fuel, hold the end of the hose with the hole in it close to your gas can and blow compressed air through the hole you made in the direction AWAY from the vehicle and towards the gas can. This will create a suction in the fuel tank and will siphon out the fuel. Do not use your mouth to suck out the fuel. This is dumb and you always end up with a mouth fuel of gas.
5. Once the fuel is flowing, keep the end of the hose that is on the ground, lower than the fuel tank and you will not create an air pocket stopping the flow of fuel. If this fills your gas can and you need to switch cans, just pull the hose out a little ways from your filler neck so that it comes above the fuel level in the tank and it will break the flow. Then simply repeat the process with the air nozzle in a new can.
I included some documents for your review. Including a very crude drawing of what I am talking about with the air hose. Hopefully this will make it clear what is supposed to happen. Once you do it, it will make sense because it is very straight forward. You are siphoning fuel the old fashion way but just replacing your mouth with an air nozzle. The only tricky part is getting the angle of the compressed air and possibly the depth in which you put air nozzle into the hose. Play with the angle and depth a little if it doesn't work at first. It will take a couple seconds for the fuel to make it up the hose and come out so don't think it will be immediate.
Hopefully this helps.
Let me know if you need further clarification and I can help out. Kenny
Images (Click to enlarge)
Sunday, April 14th, 2019 AT 8:57 AM