Y62 Operating temps

[Plasnart]

I say nuffink.

[hsbashraf]

I say nuffink.

What are you trying to say.

[MudRunnerTD]

Update: the ECU was returned to stock but it made no difference. Now if hold the fan i can hold is no resistance. Even with temps at 99,100c. The fan is barely spinning if i let it go. But strangely if i restart the vehicle the fan starts to run on full speed…. I am lost here…

What year and series is your Y62? I assume you are in the UAE because of the mention of desert.

What is the factory water temp guage showing? If it's in the normal range I would not be super concerned.

The Series 5 (and maybe earlier models) has a know fault with the viscous fan, the fault has them locking up though. You said you replaced the viscous though yeah?

Surely your Tuner can shed some light on it. If he doesn't know then maybe he shouldn't be tuning it?

[hsbashraf]

What year and series is your Y62? I assume you are in the UAE because of the mention of desert.

What is the factory water temp guage showing? If it's in the normal range I would not be super concerned.

The Series 5 (and maybe earlier models) has a know fault with the viscous fan, the fault has them locking up though. You said you replaced the viscous though yeah?

Surely your Tuner can shed some light on it. If he doesn't know then maybe he shouldn't be tuning it?

Thank you for your response. My vehicle is a 2016/06 model, but I’m not sure about the series. I am located in the GCC, specifically Saudi Arabia.

I recently replaced the fan, and the old one wasn’t locked up—the only issue was that it would start pulling air only when the coolant temperature reached 98°C. The new fan is behaving exactly the same way. However, the difference is that there’s no “roar” at startup which used to there before i started playing around with vehicle. It only locks up at 98°C and immediately slows down when the temperature drops to 95°C. The needle goes slightly up the normal notch (2nd notch) when temps are at 98C.

I also replaced the thermostat with a low-temperature one, and now, on the highway, the coolant temperature stays between 78-84°C. According to my tuner, there is no available tuning parameter for the fan speed in this model, although the platinum-spec (400hp) version does have that option. I even returned the ECU to stock, but there was no difference.
There is no overheating despite alot of dune driving in low gear.

Now, I’m considering installing two electric fans in front of the condenser that I can turn on manually when needed.i would prefer the simple mechanical fan over this contraption from Nissan.

[MudRunnerTD]

Thank you for your response. My vehicle is a 2016/06 model, but I’m not sure about the series. I am located in the GCC, specifically Saudi Arabia.

I recently replaced the fan, and the old one wasn’t locked up—the only issue was that it would start pulling air only when the coolant temperature reached 98°C. The new fan is behaving exactly the same way. However, the difference is that there’s no “roar” at startup which used to there before i started playing around with vehicle. It only locks up at 98°C and immediately slows down when the temperature drops to 95°C. The needle goes slightly up the normal notch (2nd notch) when temps are at 98C.

I also replaced the thermostat with a low-temperature one, and now, on the highway, the coolant temperature stays between 78-84°C. According to my tuner, there is no available tuning parameter for the fan speed in this model, although the platinum-spec (400hp) version does have that option. I even returned the ECU to stock, but there was no difference.
There is no overheating despite alot of dune driving in low gear.

Now, I’m considering installing two electric fans in front of the condenser that I can turn on manually when needed. i would prefer the simple mechanical fan over this contraption from Nissan.

Honestly, i think it is functioning perfectly. The temperature parameters you are quoting sound exactly correct. the temp gauge is perfect and the fan coming on and off at those temps is exactly what id want my fan to do.Perfect.

I have just re-read the thread. I think PeeBee hit is pretty right mate. Although the fan should not be needed at idle on a 20c day it is not the end of the world especially on a tuned engine. I would re-fit the old fan and give it another go. do the idle test and see if the fan comes on. Note the Temp gauge will have a massive dead spot in the middle where it wont move between standard running temp and the temp set from factory of the Thermostat opening. It is considered normal range so Nissan leave it to Not Move withing this range.

[hsbashraf]

Honestly, i think it is functioning perfectly. The temperature parameters you are quoting sound exactly correct. the temp gauge is perfect and the fan coming on and off at those temps is exactly what id want my fan to do.Perfect.

I have just re-read the thread. I think PeeBee hit is pretty right mate. Although the fan should not be needed at idle on a 20c day it is not the end of the world especially on a tuned engine. I would re-fit the old fan and give it another go. do the idle test and see if the fan comes on. Note the Temp gauge will have a massive dead spot in the middle where it wont move between standard running temp and the temp set from factory of the Thermostat opening. It is considered normal range so Nissan leave it to Not Move withing this range.

Thanks for the response. I think you are right. I have changed the fan relay and fuse and i think it improved the response of the fan. But you are right this is normal operation of y62 fan. I was out today in desert with ambient temps at 40C alot of 1st,2nd gear driving and no over heating. The temps never went above 98C. I am still planning to add 2 electric fan infront of the AC condenser to manually turn on while in Desert. Thank you all.