The prior owner of my 1988 740 turbo wagon had the exhaust system replaced from the cat back at a local Meineke muffler shop. The joint where the connection was made is leaking badly. Is it a good idea to try to tighten the clamp there or by doing so am I likely to break the pipe? Has anyone tried using any of the various tubes of goo and bandages for sale at the parts stores for this type of problem? Any suggestions would be greatly appreciated.