I just got done replacing the fuel tank in my 98 z because it was leaking horribly around the gas cap. So I got a good used one out of a junk yard. Got it put in tonight and guess what. Yep, its still F$&king leaking!!!!

I'm so pissed off right now I can barely see straight. What the hell is the problem here? I don't see any physical damage to the tank. The cap was purchased new from Chevrolet about 8 months ago. This one isn't leaking as bad as the other one but its still leaking a substantial amount. Enough to soak the side of the car in gas. Please please please, if you have ever had this problem, tell me what you did to solve it. This is driving me insane. Not to mention draining my wallet. Thanks in advance.