As hausmeister posted, I used the Torque Android app with a bluetooth OBD2 reader. Torque will let you see what the temperature sensor THINKS the temperature is. In my case, it was reading lower than the actual temperature, and the fan was never commanded to turn on by the ECU. My car was overheatin...

I'm not the ultimate expert on these cars. However, if you have negative pressure (vacuum) under those conditions, I would say that proves the PCV system is functioning. Cam seals, like every other part on the car, have a service life. Eventually, they need to be replaced even if there is no problem...

Ask that of the list in general when you have the engine out! There's no limit to what you can replace as preventive maintenance. The trick is knowing where to stop. There are certainly some seals and turbo cooling hoses behind the engine. I have a T5 Turbo in my S70 which differs in many ways from ...