Hey guys I'm new to the forum, and I need help, my fans are really loud they sound like a helicopter even at idle and after the car get to running temp.
I already:

replaced the fans with aftermarket ones.
Put a new thermostat
New radiator (old one had a leak)
Flushed out the air bubbles from the Cooling system by a certified Infiniti mechanic.
I don't know what else can be the issue. Thanks guys.
-joseph

 

the aftermarket radiators are always louder

 

to me it seems like they are always on and are on the highest speed and idle I can hear them really loud through the cabin, shouldn't it be much quieter?

 

its likely since you have aftermarket fans theyre single speed only. Oem electric fans have 2 speeds which come on at corresponding temps. Since you have single speed aftermarket ones it will always be loud.

 

Oh okay I see now. Thank you guys for the information!