Just a note, I took my cpl number with me to cummins and they still gave me the wrong gasket, seems there is two. My 92 took the gasket no. 3914385 from cummins at 15. 68 . I wouldn't use just silicon there, however, there are places that I would, just not there. By the way, the two gaskets were similar, just wrong hole pattern, slightly off, I don't know why. Tim