Plastic expansion tank gasket, Gas smell Options

[Medtner3]

The small line in the picture is plugged? With what? The other small port capped? That pass side port/pipe goes directly to the fuel tank. Thru the fill neck. Under the cap. Direct line to the atmosphere. This is part of the reason your car smells like fuel. Gaskets won't fix what's wrong.

Edit. The center tunnel? The interior? That small line connects to the expansion chamber. Not to something in the engine compartment. What does the line connect to once in the engine compartment? Does your car have fuel injection or carbs?

Not my picture btw. I have FI
My small line on the pass side goes from the expansion tank to the fuel tank. The small line on drivers side goes to a black plastic line that runs through the center tunnel to the engine bay where I have it plugged. I am working on getting a charcoal canister to connect it

You shouldn't plug this line. It is the vent for the entire fuel tank. If the vent is plugged, the system will find some other vent path, in your case likely past an imperfect gasket somewhere. Might explain your fuel smell.

You should prioritize the charcoal canister. When it's installed correctly, there is no fuel smell. Works really well.

Okay for now I will I plug it and make my own charcoal canister until the one that I ordered gets here thanks

[maf914]

I have had problems with the seal between the gas tank and the expansion tank in the past. The odor of gas developed in the cockpit and the front trunk. I loosened the eight bolts and carefully tightened the bolts, trying to get equal torque on each bolt, without a torque wrench. I tightened the bolts using a cross-pattern, similar to torqueing head bolts or case bolts. On my 76 model the bolt heads have very little clearance and it is fairly difficult to get a standard wall thickness socket onto some of the bolt heads. After a couple of attempts I was able to get a good seal and eliminate the gas odor.

[Medtner3]

I have had problems with the seal between the gas tank and the expansion tank in the past. The odor of gas developed in the cockpit and the front trunk. I loosened the eight bolts and carefully tightened the bolts, trying to get equal torque on each bolt, without a torque wrench. I tightened the bolts using a cross-pattern, similar to torqueing head bolts or case bolts. On my 76 model the bolt heads have very little clearance and it is fairly difficult to get a standard wall thickness socket onto some of the bolt heads. After a couple of attempts I was able to get a good seal and eliminate the gas odor.

I will keep trying been pretty darn careful though