Over the weekend I replace the valve cover gasket on my 04 I-5 3.5L, and let me tell you that it was no fun or easy thing to do. The biggest pain is removing the intake manifold so you can access the last two (2) valve cover bolts. If anyone out there is thinking about tackling this job get yourself a good diagram of the intake manifold showing the bolt locations. Also don't be afraid to remove just about everything from the driver side of the engine compartment to get to the bolts. If anyone is thinking about doing this I'll offer any advice I have.
Yes you are **** right!!
Just did this also to clean the injectors.
Had to loose this intake manifold, starter, front left wheel, inner fenderguard, etc...
It was like **** to getting to the screws to loose the Manifold and take out the Injectors rail.