I did mine a couple months ago. I replaced my thermostat and noticed that it was weeping just a little bit. It's tight, but it is possible to remove it without too much difficulty. Because the gasket is silicone and seats nicely into a groove in the cover, it will stay in place as you put it back. Lots of bolts, but still relatively easy. The replacement I bought at Autozone also came with replacement gaskets for each bolt, and was amazingly affordable for what it contained. Good luck!
