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Old 03-17-2013, 12:08 AM   #1
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5 dollar 50" led light bar whistle fix

If you have a 50" led light light bar then I am sure you have or are currently experiencing the whistle noise that accompanies it. So here is the reason it happens and the $5.00 dollar fix to solve it. First I want to thank "Sincityjets" for his help and assistance it tracking down the cause of the wind noise!.

First why is the noise occurring!

After a lot of trial and error and some basic engineering principles it was determined that the wind being forced up the windshield was blowing across the 5 flat fins on the back of the light bar. This was creating the same effect as blowing across the top of a coke bottle to make it whistle.

To prove this point Sincityjets taped the 5 fins and the noise went away. So the issue becomes how to break up the air blowing across the 5 fins.

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So here is the 5 dollar fix, this is standard door insulation from lowes or Home Depot


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You remove the the sticky tape and insert half of it I to the bottom of the flat fins like shown


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Another view


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And another view.

After words , just rotate it into place and the wind noise will be gone for ever! The insulation breaks up the air and prevents it from causing the whistling noise.

We hope this helps!

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Old 03-17-2013, 10:49 AM   #2
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Thanks for posting this. This fix is worth $500 to get rid of the whistle!!

Like DF said, I just put blue painters tape all the way across the back of those 5 fins, but this solution is better looking and longer lasting. That 50" light bar is cool, but that whistle sounds like a ghost from the Grudge is following you everywhere you go (over 40mph)

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Old 03-17-2013, 11:52 AM   #3
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I was about to post a very similar response. That noise has killed me for a few weeks. I knew it was coming from the light bar and verified it when I reached over the windshield while driving the other day to grab the fins. Whistle stopped!! My plan today was actually going to HD to look for something that would prohibit resonance from the fins or force the wind past the fins. Looks like my shopping trip was easily cut in half!!

Thanks Darkfire and Sincityjets
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Old 03-19-2013, 03:18 AM   #4
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I actually cut pieces of foam and inserted them into the fins. Each piece about an inch or so long, about every 6-10" ... best part is it was free... came in the box with the light! haha.
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Old 08-12-2013, 10:37 PM   #5
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Awesome! That sound was driving us crazy.
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Old 08-12-2013, 10:54 PM   #6
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Just fyi. If u have a rigid 50", they'll send u a pack of isolators free.
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Old 01-16-2014, 12:12 PM   #7
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Thanks for posting this. This fix is worth $500 to get rid of the whistle!!
Thank you so much for this! Holy god that whistle is annoying! Worth every penny!!! Cheers buddy!!
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Old 01-16-2014, 02:45 PM   #8
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Thank you so much for this! Holy god that whistle is annoying! Worth every penny!!! Cheers buddy!!
Your welcome anytime !
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Old 01-23-2014, 08:52 PM   #9
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4 rows of door insulation for good measure I have a headache just thinking about that whistling noise lol. Hopefully this will do the trick. Cheers!

Darkfire: you should really let me but you a beer or three! You have some kickass posts that I really appreciate! PM me your PayPal
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Old 01-23-2014, 11:36 PM   #10
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4 rows of door insulation for good measure I have a headache just thinking about that whistling noise lol. Hopefully this will do the trick. Cheers!

Darkfire: you should really let me but you a beer or three! You have some kickass posts that I really appreciate! PM me your PayPal
Thanks but save your money I want you to finish that Damm LS motor swap ;-)
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Old 01-23-2014, 11:55 PM   #11
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Thanks but save your money I want you to finish that Damm LS motor swap ;-)
You got it pal! <3
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Old 01-24-2014, 12:08 AM   #12
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You can also tilt the light slightly upward. The more the light is tilted downward the louder the whistle.
It only needs to be tilted upward a little off of horizontal.
I would assume that the body of the light is finned to dissipate heat. Probably stuffing insulation in between the fins may not be a real good idea. Possibly ok for using the light in a short duration, but in a prolonged lighting situation when the jeep is not moving and no airflow is cooling the light, could damage the light.
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Old 01-24-2014, 12:29 AM   #13
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You can also tilt the light slightly upward. The more the light is tilted downward the louder the whistle.
It only needs to be tilted upward a little off of horizontal.
I would assume that the body of the light is finned to dissipate heat. Probably stuffing insulation in between the fins may not be a real good idea. Possibly ok for using the light in a short duration, but in a prolonged lighting situation when the jeep is not moving and no airflow is cooling the light, could damage the light.
I didnt stuff them. They are attached with 3M adhesive to the last 1/4" of the bottom side of the fins. There will plenty of room to dissipate heat.
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Old 01-24-2014, 12:36 AM   #14
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I didnt stuff them. They are attached with 3M adhesive to the last 1/4" of the bottom side of the fins. There will plenty of room to dissipate heat.
My bad. Good deal.
Tilt thing works good too.
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Old 01-24-2014, 12:54 AM   #15
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My bad. Good deal.
Tilt thing works good too.
All good buddy...

The tilt thing... I couldn't figure why the hell my bar whistled so much after i remounted it. Come to think i had it aimed down way to far and the damn thing sounds like a high pitch train horn around 40 mph. Good stuff lol. Enough to piss a guy off in 2 seconds.

Pays over $1K for lightbar that whistles like a mofo! Yeah not cool LOL.

Anyways... Since i added the insulation strips, ABSOLUTELY ZERO WHISTLE!


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Old 01-24-2014, 01:05 AM   #16
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You can also tilt the light slightly upward. The more the light is tilted downward the louder the whistle.
It only needs to be tilted upward a little off of horizontal.
I would assume that the body of the light is finned to dissipate heat. Probably stuffing insulation in between the fins may not be a real good idea. Possibly ok for using the light in a short duration, but in a prolonged lighting situation when the jeep is not moving and no airflow is cooling the light, could damage the light.

Correct the body of the led is finned to draw out heat from the light source and dissipate. (the heat) I am thinking that the led light bar engineers would have added insulation if it would not interfere with cooling fins. It seems if they are wrapped or blocked the fins might not be able to cool down. I guess as long as the light bar can still cool down it should work.

It will be interesting to see how this works out over time or if the light bar heats up over hours of use. It may work out great...only time will tell.
I passed on the 50" light bar due to whistling and wind noise complaints. I went with ARB Intensity LEDs on the front bumper. One spot one flood..love em.
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Old 01-24-2014, 09:11 AM   #17
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Correct the body of the led is finned to draw out heat from the light source and dissipate. (the heat) I am thinking that the led light bar engineers would have added insulation if it would not interfere with cooling fins. It seems if they are wrapped or blocked the fins might not be able to cool down. I guess as long as the light bar can still cool down it should work.

It will be interesting to see how this works out over time or if the light bar heats up over hours of use. It may work out great...only time will tell.
I passed on the 50" light bar due to whistling and wind noise complaints. I went with ARB Intensity LEDs on the front bumper. One spot one flood..love em.
I literally have zero whistle anymore! Time will tell. I can't imagine having heat issues. There are still 7 fins that have nothing on them at all and the four that do are just covered 1/4" or less on 1 side.
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Old 01-24-2014, 12:38 PM   #18
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All good buddy...

The tilt thing... I couldn't figure why the hell my bar whistled so much after i remounted it. Come to think i had it aimed down way to far and the damn thing sounds like a high pitch train horn around 40 mph. Good stuff lol. Enough to piss a guy off in 2 seconds.

Pays over $1K for lightbar that whistles like a mofo! Yeah not cool LOL.

Anyways... Since i added the insulation strips, ABSOLUTELY ZERO WHISTLE!


And a soft top doesn't muffle the whistle very much either.
The bar makes the soft top flutter against the interior sound bar at 45 mph. So I stuffed a folded towel between the bar and the top. Lol, that made the passenger side window flap against the bow that runs up the window.
So I put thick neoprene pipe insulation over that, better but still noisy, so now there's sheep skin seatbelt covers over the insulation and hallelujah! It's a success.

I'm sure there's not much chance of your light overheating in Minnesota.
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Old 01-24-2014, 07:52 PM   #19
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there's sheep skin seatbelt covers over the insulation and hallelujah! It's a success
Hahahaha! I feel your pain! Its a jeep. Modifying like a boss! Hahahaha!


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I'm sure there's not much chance of your light overheating in Minnesota
Minnesota... Overheat? LOL! Whats heat?
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Old 01-24-2014, 09:45 PM   #20
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And a soft top doesn't muffle the whistle very much either.
The bar makes the soft top flutter against the interior sound bar at 45 mph. So I stuffed a folded towel between the bar and the top. Lol, that made the passenger side window flap against the bow that runs up the window.
So I put thick neoprene pipe insulation over that, better but still noisy, so now there's sheep skin seatbelt covers over the insulation and hallelujah! It's a success.

I'm sure there's not much chance of your light overheating in Minnesota.
I tried the door insulation and it worked.....for about 2 months until it froze and delamed. So I tried clear silicone in alternating 10" strips. Works great and still allows cooling.
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Old 01-24-2014, 10:38 PM   #21
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Damn not a bad idea! Well see how long these last.

I'll give that a try if all else fails. I heated them up before I put them on and they stuck like a mofo. Time will tell.
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Old 02-08-2014, 01:41 PM   #22
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I tried the door insulation and it worked.....for about 2 months until it froze and delamed. So I tried clear silicone in alternating 10" strips. Works great and still allows cooling.

The Silicone is a great idea I was actually thinking of something like that myself. How is it still holding up?
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Old 02-08-2014, 02:08 PM   #23
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The Silicone is a great idea I was actually thinking of something like that myself. How is it still holding up?
Still holding up great. Its been -20 here and I've been on the interstate at 75 mph with no issues at all. If I did it again I would use black instead of clear silicone.
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Old 02-08-2014, 04:16 PM   #24
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Still holding up great. Its been -20 here and I've been on the interstate at 75 mph with no issues at all. If I did it again I would use black instead of clear silicone.
Thanks Diablo!
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Old 02-13-2014, 01:12 AM   #25
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Insulation comes in different thicknesses, what size did you use?
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Old 02-13-2014, 01:25 AM   #26
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If I did it again I would use black instead of clear silicone.
why not .. you got the point
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Old 02-13-2014, 01:30 AM   #27
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3 weeks and still no whistle. Hell yes!
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Old 02-16-2014, 09:40 AM   #28
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I used some of the Styrofoam packing material that can with the light. I cut it in 4 inch strips and put in the fins. Now to get rid of the wind noise.
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Old 02-16-2014, 10:09 AM   #29
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Great post guys. Mine was driving me crazy too. I am going to try adjusting the angle first. If is aimed a bit high all the time no big deal on the street. Just a quick adjustment for night runs would be no big deal. I also have a 20 inch over the winch so for a quick spot I would be fine. I am also concerned with the cooling possible issues being here in AZ. Night runs are in the summer and is still really hot at night. 90's.

Next week I am back in AZ and it is hot. Wife said it was 87 yesterday- new record.
Top is coming off on Tuesday.

Question?

How much wind buffeting or turbulence are you experiencing with the top off running the 50" light bar? Any additional issues beside the annoying whistle which to me is a design flaw and should be corrected by the manufacturing.

So no testing was done by any manufacture on the street? For $1000 a pop I would expect something. On desert race trucks you are not going to hear the whistle , lol.
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Old 04-02-2014, 10:12 AM   #30
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I'm running into this issue on mine as well but had a question. The first post mentions 5 fins but I only see the one center fin with the insulation material on it. Do more fins need material on them or what?

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