OH NO. I've been though this on my 1st Combat and it can take *horrific* efforts to part. The cause is the case halves have been engine drive torque-twisted distorted to blacksmith bind on the dowels. As already separated some as indicated then it ain't sealing goop glued together anymore but mechanically jammed. Maybe just maybe heating the TS case might expand its GRIP on the dowel but it didn't in my mean cases. I'd try to rig up a special "puller" on the DS crank and case. A plate to screw the three primary case bolts in to put pressure on crank against the TS case, then use stubby wood wedges enough to be able to get levers in the crack and try to pry a part micron by micron. Dowels stick into TS case about 3/8", so that much micron by micron till freed. The cases have over lapping lips so can't just pound in a normal wedge as it hit this lip to stop its entry. I'd such though how I'd do one ugh, next time. Put plate on the open top of case, fill with dried beans and jam in wooden tooth picks or wood wedges as ya can in the tiny seam gap then soak in water the hotter the better. So puller on crank, something swelling inside may give the extra force so that you can use levers, wood chisels, screw drivers, gasket scrappers etc to actually move apart micron by micron and not tear up the sealing surfaces. If that don't work, and it may not, as *horrific* means just that, relax and take to shop to bore out the dowel then cold weld another back in. Your report is only the second one after me that I've ever read anyone else encountering so don't expect the normal sensible methods suggested to help at'all. Once parted you need to figure out which way and how much the cases are twisted on dowels and remove a bit off both dowels so case can mate and be parted again. If ya can get them apart and remove crank then try to put back together you can run into exactly same fight to part again. DAMHIK. IIRC the engine/drive torque twists the DS CW so dowels will need those opposing surfaces relieved a few .000th's. Mine only took ~.003" off one side of each dowel, which I determined by inking dowel and mating cases again, UGH > with "horrific" efforts to part again but eventually got em back to normal effort to mate and part. Also expect the crank shaft is twisted bent too but that ain't what's binding up just likely cause. This ruined many nights and some weekends for me on such simple few minute normal task.