Alright, I'm supose to be buying a car from a guy I know and he was driving it down to me tonight, about 30min's ago, and the headgasket blew out on it! Now he told me that it would run hot after while, so I though Thermostat or headgasket. Not to bad to fix.. Well anyways it blew out and he's in Macon about 20min's from me.. He said he was gonna take it to some guys house that he knew and his friend was gonna check it out.. He told me that they pulled the oil dipstick and it was kinda milk'e and that when they poured water in the radiator it would shoot back out the resernator on the ratiator. I'm not 100% sure what is wrong with it.. Please help before I go buying something thats gonna cost me aot of money to fix just to have a nice DD. Would a new headgasket and head milling sove the problem???? Thanks in advance Fast-Tech

The car is a 1991 Honda civic hatchback, dx I believe