Somebody edumacate me on a lower timing cover leak

[brookspw]

1994 c280. Had headgasket replaced. Worked fine.

A couple of weeks later, a new leak appeared. It seems to be the lower timing cover seal...so I'm told. He tells me the labor is almost as involved as the headgasket repair in the first place.

I searched several times and I'm not finding any info. It seems to be leaking at the bottom and then being blown/flung around by the flywheel/harmonic balancer or whatever that is.

Any info is appreciated.

Thanks.