Fan noisy at highway speeds

mmcpeck · 11-08-2009, 10:02 AM

'92 Pickup, 3VZ-E, 5spd.

I've noticed that the fan gets noisy after driving at highway speeds for a while. The same sound it makes when you start it up cold, or when the A/C is on.

This is not when the A/C is on, since it's November, just after a while of driving at like 65-70, I can hear that the fan clutch has tightened up and I get the loud fan whirring noise.

Doesn't do it around town at all, even if I am driving around town for a couple of hours, which is stop and go, so I would assume running hotter.

Still semi new to this truck, so not sure if this is a normal thing for the fan to do at hwy speeds or what.

Thanks.

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yotaman90 · 11-08-2009, 10:20 AM

Yes its normal. When you pull off of the highway, the engine is no longer being cooled by 70mph wind. Thus, the fan clutch engages and you hear the familiar whirring sound of the fan

yoterr · 11-08-2009, 10:20 AM

shouldnt be, maybe your fan clutch is getting stuck? i dont have a 3vze but my old ford's was stuck on all the time, sucked gas n HP (6cyl 5spd) i got an electric fan off of summit for 200 best mod i ever did for that truck

mmcpeck · 11-08-2009, 10:29 AM

Quote:

Originally Posted by yotaman90

Yes its normal. When you pull off of the highway, the engine is no longer being cooled by 70mph wind. Thus, the fan clutch engages and you hear the familiar whirring sound of the fan

It's not when I pull of the highyway, it's on the highway going 70, you can hear the fan whirring.

I don't think the clutch is stuck or else I would hear it all the time. Plus I can hear the clutch in lock up when it is started cold and then lossen up after 30-45 seconds or so, as it should. Also it will lock up when you run the A/C, as it should. But driving around town it doesn't do it, noticably at least.

If you sit at a light for a while or sit idling for whatever reason it will lock up, because it's sitting, and you can hear it when you start to go, but then comes off again in a few seconds, all normal.

I just though it was weird that it was locking up and coming on at 70mph with all that air moving across the engine.

What makes it lock up and disengage anyway, I heard once that there is some kind of gel or something in the clutch that is temp activated and gets thicker and thinner with/without heat?

yotaman90 · 11-08-2009, 10:31 AM

Does your temperature gauge read hotter when you're at highway speeds?

mmcpeck · 11-08-2009, 03:14 PM

No, temp gauge reads perfectly normal the whole time, nothing else abnormal, just hear the fan whine.

mmcpeck · 11-12-2009, 05:30 PM

So I guess this is normal then?

11-08-2009, 10:20 AM	#3 (permalink)
yoterr Registered User Join Date: Jun 2007 Location: Inverness,FL Posts: 1,065	shouldnt be, maybe your fan clutch is getting stuck? i dont have a 3vze but my old ford's was stuck on all the time, sucked gas n HP (6cyl 5spd) i got an electric fan off of summit for 200 best mod i ever did for that truck __________________ new to me 86' toy on 35" procomp mud terrains, with a 4" lift and 3" body and palm fron camo for now... 04' Dodge 2500 4x4 QC hemi leveled, home made CAI and flowmaster exhaust

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11-08-2009, 03:14 PM	#6 (permalink)
mmcpeck Registered User Join Date: May 2008 Location: Long Island, NY Posts: 425	No, temp gauge reads perfectly normal the whole time, nothing else abnormal, just hear the fan whine.

11-12-2009, 05:30 PM	#7 (permalink)
mmcpeck Registered User Join Date: May 2008 Location: Long Island, NY Posts: 425	So I guess this is normal then?