white smoke doesn't always mean you blew a head gasket. my friend had gas coming out of his throttle body, cylinders (through the holes for the spark plugs) and white smoke coming out of the exhaust. i didn't know this would cause it, but he fried his ecu (he has a d series motor), but he replaced it an ls ecu, changed the spark plugs, changed the oil w/ cheap oil, ran the car for 15 minutes, changed the plugs again and put synthetic in it...no problems anymore. you boy might wanna check his ecu...just a thought.

summed up, his ecu was burnt up therefore his motor didn' t know what the fuck to do. end of story. that shit would not run right.