My friend ran his 1995 Civic about 40 miles with no coolant in it. It warped the head and blew the head gasket. But I skimmed the head, put in a new gasket and

My friend ran his 1995 Civic about 40 miles with no coolant in it. It warped the head and blew the head gasket. But I skimmed the head, put in a new gasket and got another 50k out of it before selling it. It didn't have a single problem the whole time I had it.