Join Date: Feb 2009
Location: Northeastern BC
Just looking at the factory service manual for my '07, same engine, it looks like they've got a 29-step procedure. 90% of it involves removing a whole bunch of wiring harnesses, hoses, the accelerator cable, etc., and then putting it all back.
Basically, a time-consuming PITA.
I'd try tightening up the valve cover bolts a bit first, especially if you have an idea of where it's leaking. The factory torque for those bolts is 89 lb-in. Don't be tempted to over-torque them, as you might warp the valve cover and make it worse.
If Princess Auto were a real girl, I'd ask her to marry me.