My van over heated, I blew a head gasket and continue to drive.

I sincerely hope this is just a prank question ..... 'IF' this series of events actually took place, then you need a crash course on automobile operation .. I'm sorry but I don't think we can't help! Perhaps one of the local repair shops can check it out hands- on and give you some guidance: https://repairpal.com/repair-shops Good luck!