I've got a 92 Lumina with the 3.1 v6 in it. Poor old car seems to be hitting it's threshhold at 179k miles and needs some work. Amazingly, with that many miles, it's minor things. I've only had one other car that I've ever put more miles on (76 toyota celica gt, had 238k when I sold it).
What I need to know is, does the engine need to be rotated forward to replace the oxygen sensor? I took a quick glance while I was at work yesterday, and didn't see it. By using the online manual at autozone (how cool is that? Didn't have to buy a Haynes manual, yet), I found where it is supposed to be (passenger side, rear of engine). The thing is, I've never had to work on a car with new doo-dads like o2 sensors, so I don't really know where they are other than "on the exhaust manifold".
The other question regards changing the brake pads on the front. If I understand the setup right, there is a hex bolt that will need to be released to get the calipers to come free. Does anyone know what size that is? I've seen 7mm, but would like it confirmed if anyone knows.
Sorry for the newbie questions, but the newest car I've done extensive work on was the 76 celica. The only car I've done tear-down and rebuild on is a 69 Chevelle, and well, other than "yeah, they both have enigines", there's not a lot of similarity.