Rear main seal wear

[Christian Williams <delorean@xxxx>]

Hi guys.

I've had my rear main seal replaced probably about 4 times since I've
owned my car. Most recently has been a couple times within the last few
months. I'm using a shop here in the Bay Area that I don't necessarily
trust 100%.

I had the clutch done there and they replaced the rear main seal. A week
or so after I got it back, it was leaking. They re-did all the work for
free and replaced the seal again. They noticed some marks on the seal and
somehow "determined" that my crankshaft is warped and is turning in a
slightly oblong pattern.

I suppose they could be right, and I'll just have to live with an oil
puddle in the garage, but I'm hoping that they're wrong. Has anyone had
any experience with rear main leaks that don't seem to go away? Any
solutions? Do you recommend any oil additives to try to plug the leak? Do
you recommend that I stay far, far away from leak sealer additives?

Are there any tricks to installing the seal that this shop may not know
about?

-Christian