Oil Pan Gasket

[Jabes1]

The pan gasket doesn't have to be super tight.... Torque it to P.F.S. (Pretty freakin snug) from the center out. Basically, just tight enough that it no longer compresses.

As far as the sleeve you are talking about... not quite sure what you are talking about. They make a sleeve that slides onto the harmonic balancer that keeps it from leaking out of the seal on the timing cover. If your balancer has a groove worn into it, you might want to question if that balancer is actually dampening like its supposed to. I had a stock balancer that was pretty worn and it actually slid onto the crank without any force... needless to say I replaced it. Pioneer Powerforce harmonic balancers are affordable quality units, check them out....