Whislting Noise from Code 3 MX7000light bar.

[npd_66]

I just had a Code 3 MX7000 light bar changed over from an '03 Crown Vic to an '05 Crown Vic. The old install had the lightbar sitting on the roof mounted to the brackets. I had the new install done identical except I had the rubber bushings put on the outer brackets to raise the light bar off of the roof.

I am now getting a whistling noise at any where from 55 - 80 mph. This is a very high pitched noise and is "extremely annoying". Has anyone else had this problem and if so how do I fix it.

The wiring has been covered with a silicone putty so I think that has been eliminated. It seems to be coming from the passenger side of the light bar.

Thanks for any help.

[jeeper]

I believe its the aerodynamics of the air moving around the light bar. Probably, the best bet is to mount it low like you had on your 03. We had a whistling from our MX7000's when we had them, but, it was certainly liveable. Btw, if you think its bad on an MX7000, you should hear it on a Vector.

[Aross326]

Jeeper is 100% correct we still have the vector and its horrible!!

[npd_66]

We have the same light bar on another patrol car and haven't heard any complaints from him. I don't want to move it back on the roof because I may get interior lights next year and don't want the markings on the paint.

It just "drives me nuts" having to listen to that sound. it's like fingernails on a chalkboard.

[School Cop]

Off the top of my head...

If you like the bar sitting high, why not look into mounting one of those clear plastic "bug eyebrows" that go on the front of the hood - mount it under the bar so it keeps the air from going under the bar? Or just lower ot like someone said. I just thought that was a funny solution.

[1146]

You guys are mistaken. Its the hole they drill in the roof of the car to connect the wires to the lightbar. If it is not filled in properly you get a very loud whistle over 60mph. Silicone the hole better or wiggle around the rubber bushing until it stops doing it.

One of our squads did the same exact thing. I kinda liked it.

[npd_66]

Got this reply from Code 3.

Sir
On the bottom of the frame there is a channel in which the carriage
bolts slide into, one in the front and another in the rear and when we
build bars, we slide a polyethylene tube into both channels which will
remedy the whistling. The part number for the tubing is: T00348
(polyethylene tubing) which is sold by the foot and suggested list is
$1.15 per: foot. We do not sell direct so you will have to order thru a
Code 3 dealer

Worked like a charm!