Thanks for the quick reply. That makes a lot of sense. I don't have a compressor on hand, but I do have one of those portable air tanks that I'll try and adapt to this purpose. As for removing the valve seals, I was going to try using pliers as suggested in the tutorial. Bad idea? Also, I was going to stop by Autozone/NAPA/O'Reilley's to get a valve spring compressor. I am assuming they sell those. How much do they run? Thanks again.