Ive changed mine before. same year / engine. When I was at that point I had a couple leaks so I pulled my engine out, to change it. But I didn't use any of those tools. All I used was a basic seal remover and a mallet to install.
Thanks for your reply - it was encouraging. Still, it's taken me over a month to start this project
I got quite a bit of stuff torn away in preparation of dropping the transmission, but I decided to have another look at the flywheel area to be sure that it's the rear seal. And now I'm having second thoughts.
I replaced the oil pan gasket months ago, but that didn't stop the leaking. I eventually took it to a GM dealer, and they diagnosed it as rear seal, and wanted 2500 bucks !! to replace it.
I don't want to pick on them, but I think they were wrong. The flywheel is as dry as a bone. I removed the starter and the plastic cover next to it so I could inspect, and I don't see any oil on the flywheel. Surely if the rear seal was leaking, there would be some sign of oil in that area, no?
Anyway, at this point, I'm thinking I should replace the oil pan. I can get a Spectra Premium pan for 100 bucks at the parts store.
But before I do, I'd like to get some feedback here. Are these cast aluminum pans prone to leaking without obvious holes in them? That is, when I had the pan off a while back, I inspected it, but didn't see any obvious cracks. OTOH, the rough finish of the material could easily be hiding some cracks or pores. I see oil collecting at both ends of the pan. Could it be leaking at the mounting bolts on the bottom (where the various braces are attached)?
Is there any way the rear seal could be leaking without getting oil on the flywheel?
Thanks in advance for your replies.