2000 new beetle broke down. Over heating issue. Milky oil on dipstick. Time for new head gasket. so I remove the valve cover, to my surprise the oil deflector under the valve cover was completely melted. I don't know how long it's been like that but it has been burning oil like crazy. I've managed to get all the plastic pieces out and cleaned it all up. my question is this. I'm not sure what caused the deflector to melt like that. did the engine overheat causing the deflector to melt and block oil passages which got it super hot and blew the head gasket. has anyone experienced this before. did the oil pump suffer if the oil passages were blocked by melted plastic. not really sure where to go from here. any advice would be much appreciated.