The 1964 Chevelle gas tank has a filler neck that extends through the rear of the luggage compartment to the license plate behind which is the gas cap. The gas tank must have a 90-ohm fuel level-sending unit. The 90-ohm sender is the only one compatible with the fuel level gauge. It is recommended that the rubber hose attached to the filler neck behind the license plate be changed as well if it happens to be original.
Tools: Floor jack, Jack stands, Ratchet, Set of sockets, Common screwdriver
Install a Gas Tank
Disconnect the negative (black) battery terminal. Siphon as much fuel out of the tank as possible.
Raise the rear of the carwith the floor jack placed under the differential. Place the jack stands under the frame in front of the rear tires so they don't interfere with the fuel tank removal. Lower the car onto the stands and remove the floor jack.
Open the trunk. The rubber hose is behind the license plate and passes through the floor to the tank. Loosen its hose clamp with the screwdriver.
Place the floor jack under the center of the tank between the support straps. Raise the jack enough to give support to the tank. Remove the two bolts securing the fuel tank support straps with a socket located between the tank and the bumper. Pull the straps down and push them toward the front of the tank so they don't interfere with the removal of the tank.
Loosen the clamp on the rubber section of fuel hose attached to the fuel delivery line from the tank. Pull the fuel line hose off the tank.
Lower the fuel tank sufficiently to gain access to the top of the tank. Remove the ground wire on the side of the fuel sending unit and the power wire in the center of the unit, using a socket for the power wire. Continue to lower the fuel tank while simultaneously pulling the tank toward the front of the car just enough to dislodge the fuel filler pipe. Pull the fuel tank from under the car.
Place the new fuel tank on the floor jack and push it under the car and into position directly under its intended mounting position. Raise the tank and work the filler neck into the filler hose behind the license plate.
Raise the tank enough to connect the ground and power wires to the sending unit.
Continue to raise the tank the remainder of the way and hold it securely in position with the floor jack. Bend the support straps around the bottom of the tank, insert the bolt in each one, thread them into their brackets and tighten them, using a socket. Remove the floor jack.
Install the fuel line to the fuel tank port and tighten the clamp with a screwdriver. Move the filler neck hose down over the fuel tank metal filler pipe and tighten the clamp. Lower the car.
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