old post but I thought I would update it. I changed the front brakes and oil this weekend and was going to change the Oil filter housing gasket while I was working on it. I was stopped by the rear nut in the manifold. I can not get my hand back there to even get on the nut, and if I somehow managed to get it off, I know i have a 0% chance of getting it back on without losing the nut. Looks like I won't be able to do this one myself. Unless someone has some ideas for getting something on it and some type of socket that locks onto the nut. I don't think a magnet would hold it. If there is a way to make more room, or remove the wiring harness that is in the way. that might let me get at it. I hate to pay the $1000 to have it done, but at this time I don't see a way I can do it. Spent 3 hours trying to get that off, so I didn't have time to do the VCG this weekend. though now after reading some I think I should maybe replace the cover too and not just the gaskets.