I was changing the mounts for my air filter housing on my '84 300SD and I noticed that the little spout on the bottom of the cyclone separator that fits into the oil return line was broken off. I don't know what kind of metal it is or if it can be welded back on the separator. If it can't be welded back on, can I replace only the separator or do I have to replace the whole housing? And if I can replace just the separator, where can I get one?