Two problems related to blown head gasket have been reported for the 1998 Ford Expedition. The most recently reported issues are listed below.
Without warning vehicle stalled. Consumer had to coast off the road. Consumer had the vehicle towed to the dealer, and mechanic determined that engine head gasket failed, causing the engine to malfunction. Both head gasket blew and needed to be replaced.
While driving on freeway consumer heard a loud pop in vehcile, and then vehicle started to shake. Consumer took vehicle to the dealer, and dealer noted that head gasket had blowen out.