That is already the wrong way to set the tensioner.. Your not supposed to pry at all.. The way I do it it get the engine at TDC cyl no. 1.. Align the cams with the marks on the back of the cover.. Make sure the motor really is at TDC with inserting a long wooden stick of some sort in the number 1 spark plug hole and rotate it until it comes all the way up and then stops. Check that it is in-fact at the 0 position on the crank.. Have a 14 mm wrench ready, the tensioner should be pulled back so it is in the all the way loose position and snugged so it doesn't move. Start with the intake cam first pulling up all slack on it and rotating the cam very slightly until the belt slips over the teeth. Then with the 14mm on the cam bolt slightly rotate the cam counter clockwise to put tension on that side of the belt, now slip the belt over the exhaust side moving the cam gear slightly if you need to so it lines up. With the slack taken up on the intake side of the belt rotate the exhaust side slightly until slack is taken out of the middle of the belt between the two cam gears.. you don't have to do it much only using two fingers is enough, don't rotate anything just snug the belt up.. Now you should have a quite bit of slack on the exhaust side of the belt that goes over the tensioner. Align the belt in the middle of the tensioner and loosen the 14mm bolt on the tensioner. The spring will pull the tensioner tight.. Snug the bolt back up and rotate the crank by HAND with a 19mm socket on the crank pulley two full revolutions, then line it back up at TDC cyl no. 1 and double check that everything is still aligned properly. loosen the bolt on the tensioner once again just to make sure now that everything has seated and then snug it up again.. You do not need to tighten the idler pulley bolt that much at all, just lightly snug is all that is needed, you don't want to warp number 1 cyl bore.
Ps. This post will help you
