Loosen the tensioner, 14mm bolt, about 1 turn so it moves freely. Use a long screwdriver to push down the tensioner to give you some slack, this is shown in the manual, but it's at a 45 degree angle or so down toward the tensioner pulley from the front of the motor. Set the timing, you canset the bottom end at TDC with the mark on the timing belt sprocket of the crank pulley, there is a mark on the block, or on the pulley part/timing cover, or you can put something down the plug hole, or you can look at it with the head off... Set the head at TDC by lining up the marks on the cam gear with the valve cover-head line, with "UP" facing up. Hold the tension out of the pulley and slip the belt on. The teeth should go around the cam and crank sprockets, and the water pump, while the back goes over the tensioner, so you have sort of a P shape, looking from the driver's side. Before you retighten the pulley, turn the crank over a few times. Now make sure the timing is dead on still, also, this centers the belt. Now you can retighten the tensioner pulley.