there is usually a spring clip or screw clip on the outside drum side of door seal and the inside one is usually a spring around the seal, all door seals have to be lined up or they won't drain properly, maybe if the split is in back of door seal and high enough up you could try a patch if the seal is in good condition(not sticky)and patch will not touch door surface. to change it will need a lot of patience, but the top will have to come off and door open, not easy.
Reuben, January 2012