In the process of removing the water pump removed what i thought were all the bolts but it won't come off. it pivots side ways left and right, I put my finger on the bottom of the water pump and i feel a bolt that it may be pivoting on but it is impossible to get a wrench to for the pulley is in the way. Over the years ive changed water pumps with bolt on pulleys, im not familiar with a press on type of water pump pulley I would like to know if that is indeed the case. It is the same type of pulley as the tensioner pulley in which i removed by removing the bolt. But this pulley does not have a nut , it has a round knob. Any help would be greatly appreciated. And if so would a normal three prong wheel puller do the job. Thanks