1999 Toyota 4Runner Remove the Gas Tank

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The 1999 Toyota 4Runner uses a fuel tank mounted between the frame rails behind the rear axle at the rear of the body. The tank is held in place with three bolts on one side and two on the other. It is sandwiched between the fuel tank skid plate and the frame. Before removing the tank from the truck, be sure the fuel level is nearly empty. Trying to remove the tank with fuel in it is difficult and very dangerous.

Tools Used[edit]

Wrench set
Drain pan
Scrap board
Socket set
Flat-head screwdriver

Remove the Gas Tank[edit]

  • Drain the fuel out of the tank by removing the drain plug at the front of the tank with a wrench. Be sure you have a drain pan or bucket large enough to hold the contents of the tank. Run the fuel as low as possible before removing the tank from the truck.
  • Position a floor jack under the center of the fuel tank protector. Place a large piece of scrap wood between the jack and the tank protector. Raise the jack until the wood makes contact with the tank protector.
  • Remove the five mounting bolts from the ends of the tank protector with a socket and ratchet. Slowly lower the jack, allowing the tank and protector to descend with it. Stop when you have enough room to reach in and remove the connections on the tank before lowering it all the way. If you do not, you will break the wires or damage the fuel lines.
  • Disconnect the hose clamps at the base of the fuel filler hose and vent hose with a straight screwdriver. Pull the hoses off the fittings on the tank and move them out of the way.
  • Disconnect the wiring harness connector from the fuel pump on top of the tank by releasing the locking clip and separating the connector halves. Squeeze the two tabs together on the clamp that secures the fuel line coming from the fuel pump with a pair of pliers. Remove the clamp and pull the line free from the fitting on the tank.
  • Disconnect the wiring harness connector from the fuel level sending unit on the top, passenger's side of the tank. Lower the tank all the way down and remove it from under your 4Runner.

Tips & Warnings[edit]

  • Never use an open flame on or around the fuel tank. Once the hoses are removed from the tank fittings, it is likely that you will have a lot of fuel vapors in the air so be sure to work in a well-ventilated space to avoid breathing the fumes.