Good evening, I am trying to get a diagram and or photo of the cambelt area (the belt itself and all the relevant pulleys in that area), the cambelt was changed 2 years ago, however there is a whirring sound coming from that side of the engine, it sounds like a bearing, but which one is the question.

I have looked on the net and as yet have'nt found anything useful.

Any help/info will be greatly appreciated