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Old December 25th 17, 04:49 AM posted to rec.autos.makers.chrysler
Percival P. Cassidy[_2_]
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Posts: 241
Default Crackling/"Rustling" sound in 300M

On 12/23/2017 10:41 PM, MoPar Man wrote:
> Percival P. Cassidy wrote:
>
>> While driving at freeway speeds today, I could hear an annoying noise
>> in our '02 Chrysler 300M -- like rustling leaves, perhaps, but loud
>> and constant.
>>
>> Turning off the fan didn't seem to make any difference. When the car
>> was not moving, there was no such sound, even when I cranked the fan
>> up to its highest speed.
>>
>> Are there ventilation ducts that could have an accumulation of dry
>> leaves and are independent of the HVAC controls? If so, any ideas for
>> dealing with the problem. And please don't tell me to pull the whole
>> dash apart: once was enough for a lifetime.
>>
>> Or is there any other possible cause?

>
> You think the sound is in the cabin air-handling system?
>
> Or could it be suspension / wheel-bearings?
>
> Brakes?Â* Maybe a caliper is not releasing the pads?Â* Are you sure the
> parking brake (emergency brake) is not engaged?
>
> You get this with the hvac controls set to OFF?
>
> Next time, try setting the ventilation control to cabin-air recirculate
> mode.Â* That tends to always turn on the compressor for some reason - I
> think to de-humidify the recirculating air.Â* But the recirc mode does
> seem to close off some doors in the ductwork so that should make some
> difference if the sound is being caused by something loose in a duct.
>
> I don't believe I've ever heard that sort of sound in my '00 300m.
>
> The one thing I have got to do with my car is flush the heater core. I'd
> love to replace it, but taking the dash apart to get to it is just way
> too much work from what I can see in the service manual.


Thanks for the suggestion about the a/c controls. I'll try that.

Perce
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