Hello everyone. I'm new to this forum and am looking for some help with a gas leak on my '94 A8. Anyway, last year I rebuilt my petcock and discovered a gas leak after reassembling the tank etc. The leak seems to be coming from the two mounting bolts for the petcock. I did use a new petcock gasket and new nylon washers when I put everything back together. Was I supposed to seal the threads of the bolts before installing them, or is there something else I'm missing? I'd just like to know where I went wrong so I can repair it correctly. Thanks for reading my post.