Originally posted by "CronicBurn"
It is a stock cam, not an aftermarket adjustable one. I did the same thing, turned the gear's bolt to move the cam. Unfortunatly it snaped in the process. -- My guess would be, since the bolt's thread is one size, and before that is about 2mm larger it allowed for play on the bolt as I was moving the cam. I must have shifted the weight on the wrench just enough to break it.
if you pull the cog off the cam you will see a little piece of metal, its a key. you have to change your cam cogs (aftermarkets are called cam gears) or you have to slip the timing belt with the cams at tdc and knock them over a tooth.