Anyone know how hard it is to replace a head gasket on a 1987 4 cyl and what is involved? I'm replacing it because it has been suggested that it may be blown causing the engine to overheat. I've replaced the impellar, riser, thermostat. The motor starts instantly and runs beautifuly. But after about 7 or 8 mins. the temp starts to rise above 180 so I shut it down. The anti freeze in the riser doesent leak down a drop even after two weeks of sitting. But when it starts to overheat I hear hissing at the front of the engine and the anti-freeze boils out or the riser if I take the cap off (mistake). So I'm going to try the headgasket now unless someone has a better idea, thanks.
