Rhythmic thump sound @ 20-45ish mph
03-17-2012, 03:52 PM
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Rhythmic thump sound @ 20-45ish mph
Hello all,
I have a 2005 E320 2WD withh ~64k miles that has developed a rhythmic "thump" or "thunk" sound that happens around 20-45mph. It almost sounds like you are driving on a highway with the concrete separator gaps spaced evenly and frequently. It can be felt in the steering wheel and gas pedal, and seems to go away as I accelerate past 50mph. In an effort to troubleshoot I replaced the front passenger side wheel (it seemed like this is where it was coming from) with the spare donut tire and it felt like it got worse. I have a call into my mechanic but was wondering if any of you have an idea as to what it may be. Initially I thought I bent a wheel or had an out of round tire but after the spare tire experiment I am wondering if its something suspension related. Just as an FYI my mechanical skills go as far as doing a brake job or replacing an alternator. Anything beyond that, I know enough to be dangerous but not all that helpful.
Any ideas? Thanks in advance.
I have a 2005 E320 2WD withh ~64k miles that has developed a rhythmic "thump" or "thunk" sound that happens around 20-45mph. It almost sounds like you are driving on a highway with the concrete separator gaps spaced evenly and frequently. It can be felt in the steering wheel and gas pedal, and seems to go away as I accelerate past 50mph. In an effort to troubleshoot I replaced the front passenger side wheel (it seemed like this is where it was coming from) with the spare donut tire and it felt like it got worse. I have a call into my mechanic but was wondering if any of you have an idea as to what it may be. Initially I thought I bent a wheel or had an out of round tire but after the spare tire experiment I am wondering if its something suspension related. Just as an FYI my mechanical skills go as far as doing a brake job or replacing an alternator. Anything beyond that, I know enough to be dangerous but not all that helpful.
Any ideas? Thanks in advance.
03-17-2012, 05:21 PM
#2
Wheels out of balance? Often is the case when a problem only shows up at a certain MPH range. Had a customer in a few weeks ago and their passenger seat would shake at a certain speed, and then go away. I offered up that the wheels might be out of balance, and sure enough, they were.
Easily the simplest and cheapest thing to check first.
Easily the simplest and cheapest thing to check first.
