Fox Fan Clutch

[Jamesmcga]

I installed a new fan clutch from LMR last week and the car still sounds like a jet going down the road...I can barely hear the exhaust. I turned the fan by hand when the car was hot and before I went you for a cruise....very little difference. Did I get a bad fan clutch or is this normal? Links to the video's below.... TIA!

Cold Turn

Hot Turn

 

[7991LXnSHO]

The first concerns are about the fan shroud. It should not be that wobbly. Is it making contact with the fan blades? Is it vibrating while the car is running?

If the fan clutch is thermal, it should have a noticeable difference. If it is a non thermal clutch, then it should feel about the same.

 

[General karthief]

I agree, the bottom tabs are not in place, unbolt the top of the shroud and lift up then push the bottom towards the radiator and down on the shroud,

 

[91AOD5.0LX]

I also installed the LMR fan/clutch last week.

It definitely seems to spin more aggressive and seems louder (blowing air) than the original when the hood is open if that makes sense but when the hood is closed it does not stand out at all, it doesn't compete with the exhaust or sound abnormal. Just spins a lot faster and stronger.

I just checked/compared the cold vs. hot spins to your videos and it’s the same. No significant change in resistance either way.

Lock down that shroud for sure.

 

[Jamesmcga]

The first concerns are about the fan shroud. It should not be that wobbly. Is it making contact with the fan blades? Is it vibrating while tha car is running?

If the fan clutch is thermal, it should have a noticeable difference. If it is a non thermal clutch, then it should feel about the same.

it is thermal...the fan is not contacting the shroud, but I do I agree and I will go fix that now.
Guess I need to get a RMA from LMR. there is not a substantial difference between hot and cold rotation.

Mustang Fan Clutch (85-93) 5.0 - LMR.com

Trying to save more power while still keeping your Mustang cool? A Mustang Fan Clutch is perfect for you!

lmr.com

 

[General karthief]

There likely won't be much difference, spinning by hand and the engine spinning it at 800 rpms can't be compaired. It will loosen up over time

 

[General karthief]

And then fall off

 

[Kabuki_notch]

I have been running this thing for a couple years now, it does sound like a jet engine, I'm switching to a contour setup this spring, it's dumb loud.

 

[manicmechanic007]

If you came in complaining about fan noise
I would just say it's a working for you sir
A AutoZone cheapie will spin and make little to no noise
It will also overheat
I would live with the roar

 

[7991LXnSHO]

Thermal ones are supposed to “roar” only when hot. In vehicles where I can hear the fan over the exhaust, I can hear the fan engage and and disengage while driving on the highway on a hot day.

 

[manicmechanic007]

I live with it
When I start mine up cold it roars for about 30 seconds while it warms up the oil inside
Many factory fan clutches do not stop the roar ever

 

[ACSPONY]

I've been running the SSP heavy duty clutch for years now. It's coming off shortly in favor of a contour setup because of the jet noise.

 

[Mustang5L5]

I miss that familiar sound of the "Ford 5.0 whoosh" that i used to hear back in the late 90's with all those Ford 5.0 engined cars with bad fan clutches driving around. Used to hear those coming down the road.

 

[Dan02gt]

I live with it
When I start mine up cold it roars for about 30 seconds while it warms up the oil inside
Many factory fan clutches do not stop the roar ever

I have the Flex-A-lite standard duty fan clutch and that’s how mine is. Soon as I pull out my neighborhood it quiets down.

 

[chrlsful]

Dan: I thought those thin alu fans were the noisest? Esp @ 1,5 or 2K and above~

 

[7991LXnSHO]

Dan: I thought those thin alu fans were the noisest? Esp @ 1,5 or 2K and above~

Flex fans are noisy.

 

[Monkeybutt2000]

Flex fans are noisy.

And dangerous. One went through a buddies Cervini hood and radiator at the strip.

 

[manicmechanic007]

8-1-76 to 8-1-77 thunderchicken flex fan recall 84V078000 involved 810,000 units (T birds) Mostly with 351M
I think I changed 3,000 of them for 7 tenths each?

 

[chrlsful]

o0OP, on re-read it's the F-O-L fanclutch, not fan. sorry dan~

 

[7991LXnSHO]

It’s 83 out today, so I tested the AC and played with the fan.
I could only get the temp up to M in NORMAL around town with SC on full blast, so I doubt that is hot enough to really engage the thermal clutch action.
“Cold” and after the drive, the fan spins about a second longer than your videos.