After installing two adjust. cam gears 4 weeks ago the cam belt is at the outer edge of the cam gear and is griding on the housing - ruining the belt. I tried a search but don't understand the adjustment. Could the tensioner be ruined from over tightening? It seems to be loose even after several attempts to tighten the belt. This has come up before but Im need a picture or instruct for the fix. Those in the know please help.