Engine Vibration at Specific RPM
Thread Starter
Super Member
Joined: Apr 2009
Posts: 552
Likes: 11
From: Chicago suburbs
2004 E55 AMG
Engine Vibration at Specific RPM
Hi All,
My car has had an engine vibration since I got it 50,000 miles ago. It's not drivetrain-related as it occurs even in park. I feel it most(in the seat) when the engine speed is approximately 1,500-2,000 RPM under low load conditions or in neutral. It's not the balancer as that was replaced with the 180mm pulley/balancer and the vibration stayed exactly the same. I replaced the motor and tranny mounts a while ago, and though it lessened a bit, it was still there.
My only thoughts are that it's a harmonic(which should mostly be taken care of by the balancer), or the exhaust is somehow transmitting it to the floor of the car. I've been under the car numerous times and all the rubber exhaust insulators are good and nothing is rubbing. I should also mention that I get a rattling sound around 20-25mph in cold weather when I accelerate lightly in third gear, then it goes away as soon as the car gets some heat in it. I'm pretty sure it's not the CATS, as I've even beaten on them with a heavy rubber mallet and no rattle. I've always just accepted it, but I wanted to see if anyone has experienced this. Thanks!
My car has had an engine vibration since I got it 50,000 miles ago. It's not drivetrain-related as it occurs even in park. I feel it most(in the seat) when the engine speed is approximately 1,500-2,000 RPM under low load conditions or in neutral. It's not the balancer as that was replaced with the 180mm pulley/balancer and the vibration stayed exactly the same. I replaced the motor and tranny mounts a while ago, and though it lessened a bit, it was still there.
My only thoughts are that it's a harmonic(which should mostly be taken care of by the balancer), or the exhaust is somehow transmitting it to the floor of the car. I've been under the car numerous times and all the rubber exhaust insulators are good and nothing is rubbing. I should also mention that I get a rattling sound around 20-25mph in cold weather when I accelerate lightly in third gear, then it goes away as soon as the car gets some heat in it. I'm pretty sure it's not the CATS, as I've even beaten on them with a heavy rubber mallet and no rattle. I've always just accepted it, but I wanted to see if anyone has experienced this. Thanks!
Thread Starter
Super Member
Joined: Apr 2009
Posts: 552
Likes: 11
From: Chicago suburbs
2004 E55 AMG
Newbie
Joined: Feb 2012
Posts: 4
Likes: 0
E500
Hi There,
Did you ever find out what the source of that vibration was? I think I have the same problem on mt 03 E500
Hi All,
My car has had an engine vibration since I got it 50,000 miles ago. It's not drivetrain-related as it occurs even in park. I feel it most(in the seat) when the engine speed is approximately 1,500-2,000 RPM under low load conditions or in neutral. It's not the balancer as that was replaced with the 180mm pulley/balancer and the vibration stayed exactly the same. I replaced the motor and tranny mounts a while ago, and though it lessened a bit, it was still there.
My only thoughts are that it's a harmonic(which should mostly be taken care of by the balancer), or the exhaust is somehow transmitting it to the floor of the car. I've been under the car numerous times and all the rubber exhaust insulators are good and nothing is rubbing. I should also mention that I get a rattling sound around 20-25mph in cold weather when I accelerate lightly in third gear, then it goes away as soon as the car gets some heat in it. I'm pretty sure it's not the CATS, as I've even beaten on them with a heavy rubber mallet and no rattle. I've always just accepted it, but I wanted to see if anyone has experienced this. Thanks!
My car has had an engine vibration since I got it 50,000 miles ago. It's not drivetrain-related as it occurs even in park. I feel it most(in the seat) when the engine speed is approximately 1,500-2,000 RPM under low load conditions or in neutral. It's not the balancer as that was replaced with the 180mm pulley/balancer and the vibration stayed exactly the same. I replaced the motor and tranny mounts a while ago, and though it lessened a bit, it was still there.
My only thoughts are that it's a harmonic(which should mostly be taken care of by the balancer), or the exhaust is somehow transmitting it to the floor of the car. I've been under the car numerous times and all the rubber exhaust insulators are good and nothing is rubbing. I should also mention that I get a rattling sound around 20-25mph in cold weather when I accelerate lightly in third gear, then it goes away as soon as the car gets some heat in it. I'm pretty sure it's not the CATS, as I've even beaten on them with a heavy rubber mallet and no rattle. I've always just accepted it, but I wanted to see if anyone has experienced this. Thanks!
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Thread Starter
Super Member
Joined: Apr 2009
Posts: 552
Likes: 11
From: Chicago suburbs
2004 E55 AMG
I did! I replaced the tranny mount and the vibration was one hundred percent gone.I was honestly stunned that it worked. I believe that the first time I did the tranny and engine mounts I fastened everything down without making sure the tranny was dropped straight down onto the cross member, which caused the mounts to be slightly twisted and bind. I would recommend replacing the tranny mount only and ensure that all the bolts are in and nothing is cocked before tightening them down. FYI, I used a cheap eBay mount and it works great!
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Thread Starter
Super Member
Joined: Apr 2009
Posts: 552
Likes: 11
From: Chicago suburbs
2004 E55 AMG
Newbie
Joined: Feb 2012
Posts: 4
Likes: 0
E500
I did! I replaced the tranny mount and the vibration was one hundred percent gone.I was honestly stunned that it worked. I believe that the first time I did the tranny and engine mounts I fastened everything down without making sure the tranny was dropped straight down onto the cross member, which caused the mounts to be slightly twisted and bind. I would recommend replacing the tranny mount only and ensure that all the bolts are in and nothing is cocked before tightening them down. FYI, I used a cheap eBay mount and it works great!
Newbie
Joined: Feb 2018
Posts: 1
Likes: 0
MB w220 S500
Vibiration
Hi.ihave S500w220. With 722.6 tranny. i have same problem with the vibration. So when the car is cold and i get the engine on. Ithas terrible harmonic vibration around 1200-1800rpm. But when the engine temprature goesupto 70 C there is no any vibration. All mounts is in good conditions.
MBWorld Fanatic!
Joined: Jan 2010
Posts: 3,249
Likes: 257
From: Richmond, CA
2001 E320 Wagon, 2006 LBZ Silverado, 2007 E63 (sold), 2001 E55 (sold)
Hi.ihave S500w220. With 722.6 tranny. i have same problem with the vibration. So when the car is cold and i get the engine on. Ithas terrible harmonic vibration around 1200-1800rpm. But when the engine temprature goesupto 70 C there is no any vibration. All mounts is in good conditions.
Here: https://mbworld.org/forums/s-class-w220-16/
