Pete
As posted consider a ground down Allen wrench to tighten the upper support. This will be the quickest fix. You may get a leak, eventually, but that can be fixed in time. Everything leaks, it's just a matter of what is acceptable.

rkpatt

I did not need a puller to remove the center bearing. It just came out with with my fingers. I figured you could use a couple of finely ground flat screwdrivers to wedge it out. It will just depend on the fit of the old bearing. With the age of our cars I'll bet it just pulls out. The Sir tool is available if it is tight.

The centering tool had a center hole that goes around the crankshaft. Then you press it into the opening. The outside diameter is used to align the upper support with the lower U shaped oil pan opening. If you are careful and meticulous you can probably align the 2 halves ( upper support and lower oil pan. The upper support moves, not the lower oil pan.) without the tool. I considered taking measurements of the tool. But I did not. Look at the new seal and notice the seal contact points, flaps. The flaps on the seal make contact with those 2 parts. If the upper and lower oil pan part has a gap then you will get and oil leak. If the 2 parts produce a smooth transition then no leak. Again I think you can do this without the tool, now that I have done it. Work relatively quickly ( 1-3 minutes) so the sealant does not dry and have plenty of access to the area while aligning them.

Dave

__________________
1970 220D, owned 1980-1990
1980 240D, owned 1990-1992
1982 300TD, owned 1992-1993
1986 300SDL, owned 1993-2004
1999 E300, owned 1999-2003
1982 300TD, 213,880mi, owned since Nov 18, 1991- Aug 4, 2010 SOLD
1988 560SL, 100,000mi, owned since 1995
1965 Mustang Fastback Mileage Unknown(My sons)
1983 240D, 176,000mi (My daughers) owned since 2004
2007 Honda Accord EX-L I4 auto, the new daily driver
1985 300D 264,000mi Son's new daily driver.(sold)
2008 Hyundai Tiberon. Daughters new car