Heater not working

[zed]

Hey every one ...maybe you guys can help me..i got an 89 nissan 204 sx coupe and the thing doesnt want to heat up...the engine temp looks normal when i drive it but when i turn on the heat it blows but no heat??? I put in a new thermostat...still no heat... but this time the engine temp wont move!!!...now i bleed the system and let the engine run without the rad cap on...the engine temp goes normal but when i let the engine cool it acts up again and doesnt heat up again...and still the hear dont work...i also flushed the heater core and that didnt do nothing...what else can you guys suggest cuz its killer cold here???zed

[180fan]

when you flushed the heater core, did you put the hoses back on the right way?

[jaytv1019]

Did you put the thermostat in backwards. I read a post a while back about some one who did that but I couldn't remember if the end result was the car wouldn't warm up or the car would warm up too mcuh (overheat).

So basically my post is useless, but maybe someone who reads this could clarify what happens when you put the thermostat in backwards.

Later,

[480sx]

Well if you put a thermo in backwards it doesnt open and your block overheats.

Have you ever used something like stop leak for radiators on your car? Alot of times those products will plug up the valves that open and close your heater core.

Check to make sure you have your heater core plumbed correctly first.

[zed]

LOL...this is messed...the new thermostat is in properly, the plumbing for everything is put in the right way... I put a brand new water pump in... got my cooling system flushed professionally...also flushed the heater core....checked for any air locks...and still the this put out a minimum amount of heat...it also take like 30 mins of driving for the engine to warm up a little... only thing i can think of is that i need to change the heater core and for the engine heating up i just dont know....ZED