[Cris]

Praxis454:

Try a single edge razor blade (see image below). You can buy them in bulk at the hardware store. We use them to break thin glue lines at work. Use a small hammer to (gently) tap them in through the sealant, just keep working around the seam. You can follow it with a thin, sharp paint scraper to break it completely loose.

I am following your efforts. I also have an inline 6 and need to remove the oil pan to strip and paint it. Like you, I can't tell if it will slide off without raising the motor.