My 2002 Hijet (52000 miles) suddenly lost power. The engine sounded fine, but I was clearly going nowhere and had to be recovered. I got towed to safety, then the RAC came. RAC said engine was misfiring (it did sound like that when the RAC started it). My local garage now says it is the head gasket and seems to think the vehicle should be scrapped. I had not had any problems before this except that it seemed to be using oil. Does this sound like head gasket? If it is head gasket, surely the vehicle (MPV in average condition) is worth repairing? I need advice, urgently, please, since I know NOTHING!