When I first changed my fuel filter on my truck around 10,000 miles it was all rusted out. Then I seen where othes on this site had the same problem. I was talking to a good friend of mine who has been a diesel machanic for over 20 years and I told him about the problem. He said it must have been moister in the system when the truck was built. He said that the duramax is the only engine with this problem. Dodge cummins and the new Ford 6.0 powerstroke have had no rusting in the fuel system. What can we do about this rusting problem. I have never had to deal with a problem like this and I dont want to keep sending rust particles through my injectors and engine. He also told me not to ever substain a pyro temp higher than 1400 degrees. He said 1400 degrees is where alluminum melts down. He has replaced a couple of heads and head gaskets on duramaxs that were stock. The alliminum heads are still a litle scary to me on a cast iron block. What do you all think?