I have a 98 Lumina (3.1L). that has been leaking coolant like crazy. I went in to get the problem fixed and was told that the lower intake gasket was shot. The factory model gasket was made of plastic and my mechanic is going to be replacing it with one that came out two years later that is made of metal. I wanted to know if anyone else has had this problem and what steps were taken to fix the problem. I want to know if my $630 was spent wisely.