Rumbling noise/frequency?
07-18-2017, 05:48 PM
#1
Member
Thread Starter
Rumbling noise/frequency?
Mostly noticeable from 60 mph and above, and it can't be tires. 2 second cycle where this rumbling acoustic. And I feel that the consumption is high. At this speed, 0.9—1 liter pr 10 km. 2 adults and 2 children on boarding.
07-18-2017, 07:17 PM
#3
MBWorld Fanatic!
Why can't it be tires?
Check mounts, driveshaft bushings, etc. Gotta be something driveline related if it "can't be tires" even though, it's normally tires.
Check mounts, driveshaft bushings, etc. Gotta be something driveline related if it "can't be tires" even though, it's normally tires.
07-19-2017, 12:55 AM
#4
Member
Thread Starter
Tires don't behave like that, then the frequency would be more stable not going up and down at the same speed.
07-19-2017, 11:48 AM
#7
A noise that appears at a certain speed and then disappears could be a harmonic.
Harmonic noises can be translated to the vehicle and our ears, in different ways.
In fact, they can often be "thrown" from the originating location to a new location unrelated to the noise - fooling us.
That being said, if the tires have uneven wear or pressure, it could account for your description.
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07-19-2017, 05:16 PM
#8
Member
Thread Starter
It can't be records. It's not noticeable by pasienters, but I can can feel it through the seat at styring wheel as a wrooooom-----------wroooooom kinda feeling. Small vibrations that comes a second apart. Condition of road does not matter, Im kinda concentrated above 80, but still. Wtf?
07-19-2017, 05:39 PM
#9
MBWorld Fanatic!
You're feeling the change in vibration as the intensity increases, not frequency. It's an amplitude fluctuation, as it gets very severe it transmits into the car and dampens, then starts over again. I've had this happen before, it's always driveline or tire related. There is a bulletin on the 166 about turning the driveshaft 1 bolt, just unbolt it and move it to the next bolt holes, then put it back on, to attempt to address this type of thing. At this point, that's the stuff you have to try.
The first step is to swap a set of wheels/tires from another vehicle that doesn't shake though, just to rule them out.
The first step is to swap a set of wheels/tires from another vehicle that doesn't shake though, just to rule them out.
07-19-2017, 05:45 PM
#10
Member
Thread Starter
You're feeling the change in vibration as the intensity increases, not frequency. It's an amplitude fluctuation, as it gets very severe it transmits into the car and dampens, then starts over again. I've had this happen before, it's always driveline or tire related. There is a bulletin on the 166 about turning the driveshaft 1 bolt, just unbolt it and move it to the next bolt holes, then put it back on, to attempt to address this type of thing. At this point, that's the stuff you have to try.
The first step is to swap a set of wheels/tires from another vehicle that doesn't shake though, just to rule them out.
The first step is to swap a set of wheels/tires from another vehicle that doesn't shake though, just to rule them out.
(my head don't do miles for the time being)
07-19-2017, 06:52 PM
#11
MBWorld Fanatic!
It can't be records. It's not noticeable by pasienters, but I can can feel it through the seat at styring wheel as a wrooooom-----------wroooooom kinda feeling. Small vibrations that comes a second apart. Condition of road does not matter, Im kinda concentrated above 80, but still. Wtf?
