wait a min. did you say"The code indicated a problem with the purge solenoid. The dealer replaced that. then you said ,,, The dealer exposed the tank and it is collapsed and then you said the dealer said The dealer thinks the defective purge valve may have played a role in it. now at this point you should tell the dealer ,,that being that he sold and installed you a purge valve that was bad ,, he is responsable for the tank. and that you want a new tank at the dealer's expence. . jim