I just Bought a 1998 3500 drw, 2wd, 12 valve used from a person I did not know. Info I have on the truck is that it was in an accident causing the left front wheel to almost rip off, no body damage. Wheel was repaired and truck drives great. Engine sounds great, coolant looks good, oil is clean, transmission shifts fine, body is mint, interior is clean has 49k on it. Now the only problem is I noticed the oil pan was replaced and now may be leaking. I have an appointment to have a dump body installed two days from now. How hard is it to repair a leaking oil pan seal? Does engine need removal, should I be worried about this engine, what possible could have been done to it if the pan was removed? The reason I asked is I may cancel the body until I know more about this problem.