Hey Guys,
Have a 01 QX4. Was wondering if you folks have noticed that the radiator fan NEVER turns off? I did just replace the clutch pulley b/c of squealing...but is this normal?
Thanks!
Radiator Fan - Never off?
-
nissandoms47
- Posts: 407
- Joined: Mon Jan 01, 2007 10:22 am
- Car: 2002 Nissan Pathfinder SEV6-Custom 7" lift-33-1250R15 BFG KM2- a bunch of other s*** i cant think of
Re: Radiator Fan - Never off? (vliou)
Its belt driven, it will never stop turning. Depending on how warm the engine is will determine on how fast the fan spins.
Re: Radiator Fan - Never off? (nissandoms47)
Correct, but i also wanted to mention that the fan is on a clutch/belt driven system, not 100% strictly belt. The ECU is constantly changing the speed of the fan via the clutch, depending on how warm the engine is. When your engine is warm, you can put on some garden gloves and actually stop the fan momentarily, this is how to diagnose whether a squeal is coming from the fan clutch or elsewhere.... Do not try this on a cold engine, because the fan clutch is engaged nearly 100% on cold starts, I don't know why.nissandoms47 wrote:Its belt driven, it will never stop turning. Depending on how warm the engine is will determine on how fast the fan spins.
-
nissandoms47
- Posts: 407
- Joined: Mon Jan 01, 2007 10:22 am
- Car: 2002 Nissan Pathfinder SEV6-Custom 7" lift-33-1250R15 BFG KM2- a bunch of other s*** i cant think of
Re: Radiator Fan - Never off? (fueler)
Yes he knows its clutch driven. And no, the ECU has nothing to do with the fan clutch. The clutch as some kind of liquid inside of it that controls how fast it spins and what not. At least thats what ive heard. For the ECU to control the fan clutch there would have to be some kind of electrical connector attached to it.