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When I took my gas tank out I noticed there were thin rubber "gaskets" at various spots that touched the car body and belt bracket. I have gaskets that are thin and have adhesive on one side I plan to put on after it's done at the shop. Has anyone else noticed these stick on rubber pieces? Did you replace the pieces? I figured they are there for a reason. Thanks to everyone for their input.
Original Post
As you guessed, they are there to keep the thin steel of the tank from shifting and wearing against the mounts and restraints. As a full 24 gallons of fuel jacks the tank weight up to around 175 lbs (the fuel alone is 163 lbs), this is a good idea. Unfortunately, in early cars at least, DeTomaso used open-cell foam that absorbs water. This resulted in a few of the unpainted tanks corroding through from the outside.Contact-cementing new strips of rubber in any area that might conceivably touch other parts will adequately protect the tank. I'd suggest 1/4" thick pieces maybe of industrial belting, NOT foam rubber of any type. Also note that the tank position can be adjusted outboard a bit, to afford more header clearance even if your car has the L-type outside fuel filler.
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