i just got done rebuilding my b18c1 and my fans havent turned on yet. the fans dont turn on when the engine gets warm or normal opperating temperature or even when i turn on my a/c. i havent really had a chance to check it out yet but does anyone know what might be causing this?

 

Maybe the temp sensor. It's a screw type sensor made of metal, when the coolant hot enough, the metal piece inside the sensor touches each other and the fan will turn on. I think maybe that one. Also check yr thermostat

 

check the fan switch. It's the round sensor connector right by the thermostat. If it is plugged in, then check the ground. If everything is okay, then you might want to try to replace the fan switch. But mostly likely, I bet it's not plugged in.