I think I blew a header gasket on the way home from work on the passenger side. It started leaking really bad and got dark out before the engine cooled enough to see if it just needs to be tightend. If I do need a new one, what is the best to get? After scraping off the old gasket, is it just a matter of putting the new one between the block and header and tightening down the bolts? Is it ok to drive it with it leaking like it is? It's leaking pretty bad, but I won't have time to fix it before I go to work tomorrow.