I did timing belt kit water pump thermostat all new seals and valve cover gaskets two new camshaft tensioners . I checked everything and there was no leaks at least that's what I thought. I checked a week later with my inspection mirror and the new camshaft tensioner on the passenger side rear is leaking from the back of the tensioner not from the gasket area. Should I try rtv black, jb weld. Take everything back a loose and send back the tensioner only 90 day warranty. The car 2003 A8 102,000 mile from california car is running perfect no codes. Anyone ever have this happen here are the pictures. Any suggestions would be greatly appreciated.....