Changed water pump. Second one in two years and only 18,000 miles. I put a Graf pump with a metal impeller when I last replaced it. I replaced it as a part of a cooling system refresh. I went with that one because it had good reviews on FCP and it had the metal impeller and I wanted something I didn't need to worry about self destructing because it was plastic. The thing is a piece of junk. Judging from the rusty water marks it has probably been seeping for about the last 3000 miles. The bearing had become loose. Because it was a weep and pretty much hidden from view I didn't figure out I had a problem until I started hearing noise coming from it. So 15,000 miles on a water pump. That is totally ridiculous. FCP should quit selling these pieces of junk. The reviews fell of a cliff for the Graf shortly after i bought one. I don't think its being made where they claim. I think its coming from China.