I read the thread from a few days ago in the 900 section started by poolman so I figured I would give it a try. Adjusting cam timing is rediculously easy. The cam gear came from the factory with wide slots for adjustement but they are not marked in degrees.

Loosen the three 10mm bolts on the front of the cam gear.


I took out the top bolt to show how the cam is adjusted dead center in the slot from the factory.


With the 3 bolts loose use a large screw driver to rotate the cam clockwise. The cam gear stays put. This will advance the intake cam. Please excuse my cheap camera.


Intake cam is now at full advance. Now just tighten down the bolts and you are done.


That was yesterday and I haven't drive the car since. I don't know if the valves are going to hit the pistons if I start the engine in this position. I have no idea how many degrees this is. I slept on that question and realized that Volvo wouldn't leave enough adjustment in the cam gear to let the valves hit. Would they? What do you think?
Justin