A garage will charge anywhere from $450 to $900 to do the LIM gaskets. I went through the same thing as you though......my wife's 3400 Grand Am GT had bad LIM gaskets and I couldn't afford the garages price (since they are more expensive to do) and I just decided to try and do it myself. That was the first time I ever tore into an engine and now I'm making videos of me doing it on other peoples cars....lol! -Dave