Well i took it in, because i could not find the leak, the welds on the front heat exchanger failed, causing the leak, had it welded without taking the sled apart, there was a puddle under it this morning, so he started pulling it apart and found another leak where the gas line rubbed thru the heat exchanger on the front side, it must be aluminum from looking at the pic he sent me, but, i am not happy, as this is a factory fault, it is gonna cost me around $1500 now to get this fixed and i dont even have 1000 miles on it yet, the guy i took it to, thought it was brand new, because i take care of my stuff and dont beat them.