It sometimes makes it easier if you can have help. Here is the replacement instructions.
CAUTION: The following procedure can only be used when the camshaft sprockets HAVE NOT BEEN LOOSENED or removed from the camshafts. Refer to Camshaft Sprocket and Engine Timing if sprocket or camshaft have been loosened or removed. See: Timing ComponentsREMOVAL
CAUTION: Index the tensioner in the vise the same way it is installed on the engine. This is to ensure proper pin orientation when tensioner is installed on the engine.
CAUTION: This procedure can only be used when the camshaft sprockets HAVE NOT BEEN LOOSENED or removed from the camshafts.INSTALLATION