4386 - Why does the replacment turbo not fit?? Advice needed, 2SE Borg Warner 167336 in Technical IH Talk Posted July 26 When we put 3lm on ours, we had to grid/ cut to fit. Had the same exact problem you have. Was literally just taking little off at a time till was able to put boot on. That 1/4-3/8 number sounds correct. Hope this is helpful.