Need to back crank back enough to grab the belt and take slack out of belt on rear side when turning back to TDC line. Now you are ready to mount the tensioner. Helps to hold belt on with simple paper cliks. Front cams want to jump on ya. So after lining up with valve covers took the off and held cams in place with vice grips. SHHHHade tRRRRee for sure but it worked. Gots me a snap off box too !