Theres a few pics and some commentary on me changing my spark plugs. In retrospect they werent really that bad
The front cover "thingy" was just amazingly hard to get off, the back one basically popped right off. I have no idea.
The PCV should be easy, just remove the engine cover, unplug the vacuum line going to the PCV valve on the front camcover and pop the old one out and put the new one in. If the ring it sits in looks to be deteriorated you might consider replacing that as well. In the thread I linked you to, there is a picture of me holding the dogbone engine mount, the PCV valve is right above my hand, you can see the vacuum hose going to it.
O2 sensor, as was said should probably be done mostly by feel, theres a pic of mine in that thread, but that was with the engine moved forward, which the Aurora cannot do. Shouldnt be too horrible though.
The O2 sensor will be easiest to remove if the engine is hot, making the "by feel" approach a bit more "fun" shall we say? But that tidbit is straight out of the repair manuals, so it must be true right?
*IMPORTANT* be sure to put anti-seize on the threads of the spark plugs, these engines have aluminum heads, and if anti-seize isnt used the plugs will bond to the heads, and it will most likely be the last set of plus the engine will ever see.
I cant think of anything else right now, hit up myself or Custom if you need any advice. I think were the only 3.5 owners here.
2000 Oldsmobile Intrigue 3.5L DOHC V6 15x,xxx miles "The Forgotten W-Body"
shaved badges, Eclipse HU, Pioneer TS-A1370R'*, Pioneer TS-A6971R'*, 20% tint, cleared corners, Silverstar Hi'*, 9005 Low'*
Fenderwell Intake, Hi-Flow Cat, U-bend delete, GMPP Handling Kit, MOOG endlinks, and 12-inch front rotors
1996 Bonneville SE RIP 157,751 miles, totaled 8/29/05