Hi, wannabe VW mechanic here with a question about a fuel smell on my '77 bus. With the tank full the cabin reeks with a fuel smell that goes away when the gas level goes down to about 1/2. Any idea what this might be? Also, looking towards the tank in the engine compartment, I see wet areas at the bottom seam of the hatch covering the tank. I've been driving around with 1/2 tank and no problems but I'm about to park it this week and break into it to fix it. Any suggestions on what to look for?
Thanks
-Noah