bad day @@@@

[180sx]

ok wierd thing happend to my friends nissan in the mornin today we started it wormed up drove few blocks no heat!!!! cold air, engine i worm so i figure heater core. that 2 blocks later i look and his engine temp is on the maX!!!! so park check it out antifreeze s gushing through overflow bucket. well now i'm thinking water pump. let it sit for a bit refilled rad with some water from the reddi mart.drove for a bit temp went to the max again and still no heat so parked it went to eat breakfast. came back started it warmed up drove home no problem no overheating, warm in the car. what was that ???? i'm thinking maybe he had water mainly not antifreeze in his rad so it froze and created ice block than while engine was on max heat cooling off ice melted and everything is fine now.its sitting in the garage i'm gonna drain his cooling fluid well now its mainly water and replace it with antifreeze than see if still does it tomorrow morning. :help

[PROJECTRB240SX]

COULD BE THERMOSTAT, FAN CLUTCH, THERE ARE NUMEROUS THINGS THAT COULD BE WRONG.

[Syntax360]

that's not cool - my heater core went out on my Z and caused it to overheat once - that blew the headgasket :-\ He should really have that checked out

[MikeMurphy]

maybe an air bubble? im not too sure. good luck =)

also may want to consider changing your oil.

[180sx]

well car drove just normal on the way home, and heat is working so can't be the core .numerous things? your cooling system only consist of a few things!

[zion]

it's probably your thermistat sticking, check to see if you have any other leaks other than your resevior. make sure that you dont use too much antifreeze or water, 50/50 mix is what you should use.

sorry my spelling sucks...

[TachyonS14]

A good way to check the thermo, is if the top hose is really hot, and the bottom one where the thermo. is behind is cold, then you know it's your thermostat. You know your thermo. isn't opening and letting the coolant/water run through the radiator to be cooled again. Thats what happened with mine a while back, and it's a real easy job to do.