04 g35 overheat..help!!

[goloman01]

when i started the car and drive like 20 minus ( the speed around 30m).. the temp start to goes up...then i have to turn off the car. after 20 minus the the temp start to go back to normal..i did try when the temp goes pretty high, i keep accelerate( the speed around 50) the temp drop back to normal... can someone tell me doest the fan's problem or what?

[pfarmer]

when i started the car and drive like 20 minus ( the speed around 30m).. the temp start to goes up...then i have to turn off the car. after 20 minus the the temp start to go back to normal..i did try when the temp goes pretty high, i keep accelerate( the speed around 50) the temp drop back to normal... can someone tell me doest the fan's problem or what?

Make sure your cooling system is filled and vented.

Perry

[joe603]

How high is the temp?

[tollboothwilley]

I don't really understand what you are saying. But...

heating issues on our cars are determined by

1) A leak in the coolant system (you should see the fluid pool)

2) Air in the system (G35's are difficult to bleed all the air out)

3) Fans Going bad (Heat will rise when you are IDLING) If your heat is fine when the car is moving it is probably your fans. Check to see if they are both spinning when the air conditioner comes on if the temp gauge moves at all.

[Poyzinous]

Possible fixes:1-make sure system has enough coolant2-replace thermostat3-replace radiator cap4-radiator could be clogged and/or damaged5-temp gauge could be confused with speedometer. 6-too much air in system or coolant temperature sensor could be dead, or faulty.

[pfarmer]

I don't really understand what you are saying. But...

heating issues on our cars are determined by

1) A leak in the coolant system (you should see the fluid pool)

2) Air in the system (G35's are difficult to bleed all the air out)

3) Fans Going bad (Heat will rise when you are IDLING) If your heat is fine when the car is moving it is probably your fans. Check to see if they are both spinning when the air conditioner comes on if the temp gauge moves at all.

About the fans I have seen some aftermarket fans where one could be spinning in the wrong direction which short circuits the air flow between two. So even if the fans are operation make sure they are BOTH spinning in the correct direction.

Perry

[Poyzinous]

About the fans I have seen some aftermarket fans where one could be spinning in the wrong direction

I saw that once in a friends maxima. He did his own 'repair'. Those fans were blowing so hard the car would go backwards in neutral but then they burned up after resistance from incoming highway speed winds

[pfarmer]

I saw that once in a friends maxima. He did his own 'repair'. Those fans were blowing so hard the car would go backwards in neutral but then they burned up after resistance from incoming highway speed winds

On heavy industrial equipment the fans are usually reversible on any equipment that doesn't have a cab. Either you turn the individual blades on engine driven fans or reverse the plugs. This keeps dust from coming back on the operator and during cold weather you can blow warm (actually more than warm, I used to operate a D8 cat) if flowing front to back. I have been on the machines before where someone has started to reverse the blades and never finish so you have half the fan blowing one way and the other half blowing the other. Machine then is the one getting hot.

Most of the time when I have seen this on cars for some reason it has been where only one of multiple fans blew the wrong way. This is why I mentioned short circuiting. This will often go unnoticed during moderate weather but shows up during hot weather when air flow is simply short circuiting between the fans. One fan pulls in cool air and it gains heat from the radiator and then is sucked in by the other fans and picks up more heat yet.

Perry