hi, I need help, I wish someone can help me if they know anything about it....my G35 is year of 2004 and it a sedan, and today the fan noise is so loud and i found out it over heat, so i add the coolant in the small coolant container....and wait a bit to cool down and drive back home....during the 10 min driving....i saw the temperature is getting up again......and the coolant in the small container is full and the fan is on....and i can't found out what problem

can some one tell me what happen with it...

 

Could be that the thermostat is out, air in coolant system or fans have failed.

 

i check the coolant is ok and the fan is work.......so i suppose to be the thermostat... is there any way i can find out should be the thermostat problem???

 

One way is to take it out, place in a pot of water at about 170 degrees and then raise the heat up watching to see if it opens and closes. Often times you will have about a 10 degree range of 180-190 degrees.

Or...............just by a new one if you suspect a possible issue and since you already took everything apart you already did all the labor so just replace it. Burb the system of air and cross your fingers.

 

Anything change lately?

Thermostat, water pump, fans or air in the system.

I'd start with the thermostat.

Do you have a mechanical or dual electric fans?

 

no i never change anything but i guess it should be the thermostat......when i drove like 10 mins and the fan is keep running coolant is enough but the temperature is pretty high......

 

Its probably your thermostat. GeoBau's thermostat cracked on him a few months ago and his car was experiencing the same symptoms. I would replace it.

 

i already gave it to the machanic to see what's going on my car in the moring today and i will see what he feedback......

 

Why would you trust a generic mechanic instead of using a trained certified technican who works on nothing but Nissans every day?

Even a Ferrari technican could be at a loss on Infiniti.