Cooling fan question...

[Chief Hof]

Does anyone on the Forum know why the cooling fan blades for either the 2.5L or 4.2L are offset?

 

[jeepjoe43]

Does anyone on the Forum know why the cooling fan blades for either the 2.5L or 4.2L are offset?

They're off-set to reduce fan noise.

 

[machoheadgames]

They're off-set to reduce fan noise.

Interesting, I have never heard that before. Mine is still loud AF though, lol.

 

[dudeman]

Interesting, I have never heard that before. Mine is still loud AF though, lol.

Just think how much louder it would be if they weren't offset.

 

[jeepjoe43]

Just think how much louder it would be if they weren't offset.

Once had an aftermarket fan that wasn't off-set, and at certain engine speeds it sounded like a small aircraft.
Something to do with harmonics.

 

[machoheadgames]

Once had an aftermarket fan that wasn't off-set, and at certain engine speeds it sounded like a small aircraft.
Something to do with harmonics.

My previous ranger and my Frontier both have plastic blade clutch fans, and they have equal spacing between them all, so no offset. Can’t say they’re noticeably louder than the Jeep due to their Fan blade design, really all 3 vehicles sound like hurricanes. Maybe if the trucks had metal blade fans, they’d be louder than than the Jeep though? No idea. Really doesn’t matter to me, if I can hear it, I know it’s cooling

 

[Flyer58]

Same holds true for street tire treads with variable size rubber treads to cut back on harmonic road noise.

 

[jeepjoe43]

Same holds true for street tire treads with variable size rubber treads to cut back on harmonic road noise.

And, IMHO, why TSLs make their own brand of Music, though Boggers tendeth toward Heavy Metal.

 

[Flyer58]

And, IMHO, why TSLs make their own brand of Music, though Boggers tendeth toward Heavy Metal.

 

[jeepjoe43]

That's what I'm talkin' about, Swamp music!!!

 

[Steel City 06]

It was actually a common swap on TJs to switch to an 11 blade Ford Explorer fan and HD fan clutch. Now that makes some noise. Also moves a ridiculous amount of air.