I replaced my uim today got it from zzp, and everything went very well no leaks, everything is ok....other than this awfull loud squaking noice that goes away within 10 secs but what in the world is it? Anybody have ANY ideas? Well i should have researched on here a little more than i did before posting this but, in a post about a whistling noise BIO248 mentioned pcv valve and i went to check and forgot to put it in the new one, put it in started it and no whistling!!!