dude, i just had to take mine off like 3 times, i dont really know how to do it rite, but it worked 4 me, there is a hole in the spring thingy and i put like a nail in it and it relieves a little stress on it, then pry, to get it back on, just get it mostly on, and flip the starter a few short! flips to get it back on track
The proper way to remove the tensioner is to loosen the water pump. The water pump is held down with clamping screws that do not go thru the water pump but rather beside it.If you look closely at the pump (pump off of engine) you will see that the shaft and pulley are not in the center of the pump but rather offset(eccentric) so that as as you rotate the pump in its housing the pulley will move in or out. The hole in the tensioner is used to help install it not remove it. To install the belt first loosen the water pump bolts enough so the water pump will rotate in its housing,mount the tensioner to the engine with a nail or drill bit thru it(as the previous poster noted)install the belt (making sure the marks are in alignment),remove the nail or drill bit and rotate the water pump intil the tensioner spring just reaches full compression and then tighten down thw water pump bolts. Hope this is a better explanation - Clyde
the proper whay is to push the tab down/or loosen the bolts and it comes off easy.