The drill/extractors I bought were useless, at least on 10.9 grade bolts. After working on things all morning (removing the radiator and intercooler and moving the A/C condenser out of the way) I checked the manual and found the piece the pulley bolts into (called a pulley boss) is not part of the cam belt pulley and it slides right off. I went ahead and ordered a new one from the local dealer, when I got home having nothing to lose I decided to work on the original one. Using a drill on the back side, the first two bolt stubs came out easily. The third one was stuck and I had to drill it all the way through and use an eazy-out. Happily all the threads in the holes are fine, so I can reuse this boss. I'll wait until the spacer shows up so I can put it all together and measure to make sure the 35mm bolt length is the correct one. I'll be cancelling my order from the dealer too.