I recently ran into a problem with my cam timing gear- namely, it fell apart. Despite its strong resistance, i have managed to remove the bolt that holds it on. Now, i have a cam with the hub of the gear still on it. It is still secured by the cam retaining plate ( please excuse any misidentification of parts- i dont think im far off if im wrong ) but i can not remove the hub of the gear. I was given the suggestion to try to put a screwdriver behind it and pry it off- there is no space in which to fit such a thing. The hub is flush with the surrounding surface. I am aware of the danger of sliding the cam backwards too far and am looking for a way to do this safely. I imagine there is a puller of some kind available- i havent looked into it yet. If anyone knows where i can get one of those cheap or how to substitute for it i would greatly appreciate any input. As well as some advice on putting on the new gear. I know there is a woodruff key there but im not entirely sure how that works- is this my problem? Thank you for your help.