Hello everyone,

I have an '05 G35 coupe that I bought in the US. After 2 years of using it there, I had it shipped to Saudi Arabia. Now I'm having an engine overheating problem especially when I'm driving it during the day when the temperature is well above 105F. The engine temperature gets real high sometimes, close to the red line area. What's surprising is that the temperature never went up when I used to drive it back in the US (Texas and Oklahoma weather).

The car has about 73k miles on it.

Does anybody know what might be causing the problem?

Thanks in advance

 

probably time for a coolant change and check your fans. I've read on this forum that the fan motor fails from time to time to be sure i'd do the thermostat and water pump for secure measure. Clean out your radiator as well.

 

an upgraded KOYO aluminum rad + fans would help .

 

dude i have the same problem will do the radiator flushing within the coming days and will check.
BTW i live in UAE which i guess its the temperature issue

 

What coolant to distilled water ratio is suggested for your hot climate?

 

I'm not sure How can I find out?

 

most of the time it is 50/50, but someone plz confirm

 

what kind of fuel are you using in the engine? i thought UAE uses leaded fuel still? If that is the case then that could be causing your OH issues as you would be using the wrong type of gas. US uses UNleaded fuel

 

how is your heat at idle? should be almost uncomfortable out the center vents set to full heat on the highest fan setting. if not there could be an air pocket in your cooling system.

are you cooling fans kicking on? are they running on full blast constantly?

 

we use in UAE 95
Guys my heat at idle is normal and i drove it today for 5 hours to test it and pushed it to check and it was fine but what i noticed is that when i drive over 60 mph for about 15 minutes my temoreture increase like crazy BUT when i rev the engine up like i shift to forth gear and push the car the tempreature comes down immedtely to normal, what do u guys think, is it the fans or what???

PLEASE HELP!!!!!!!

 

I'm not an expert, but here is what I think. It isn't the fans, because your problem only occurs at highway speeds. At highway speeds there is so much air going across the radiator that the fans just aren't the issue. I also don't think it is the thermostat, because a bad thermostat would cause cooling issues at any speed. It could be the water pump. You say the situation improves when you raise the revs. When you raise the revs the water pump is turning faster which could make up for a poorly working pump. You could also check that the belt is tight. You might try changing the coolant and having it pressure tested before spending money on the water pump.

One more thing. Does turning off the AC help lower the temp?

 

Thanks b,ro for ur advice, i have been told the same, will try to check everything and will update you guys

About the AC i think its the same issue as i tried it but same thing happenes.

 

You need to purge the cooling system real good with a spill free funnel. Little bits of air get caught in the system real easy and cause all kinds of issues in hot weather. This is a very common issue with the VQ.

 

What do u mean dude,

Can u explain???

 

Click Here?