Engine Vibration Still Continues
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Joined: Jun 2021
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E320 4Matic
Engine Vibration Still Continues
Hey guys so i have been having this problem for quite some time now my car has only 89000km. I changed the engine mounts, the transmission mount, spark plugs, pulley, tensioner and lastly the harmonic balancer even after changing all these pieces, the engine vibration continues when I leave the car on P or N. by going in reverse or drive i barley feel anything,
when I'm driving i don't feel any vibration smooth as a whistle. (PS there is a difference of before changing all these parts compared to now)
the only thing i don't quite get is even after replacing my harmonic balancer there is a tiny vibration to it, maybe you guys can shed some light on this my mechanic seems to say that its ok and its not the problem and that the harmonic balancer is fine.
I've been doing some research online and seen a few video's talking about the front drive shaft being one issue, I'm starting to think this might be it since the vibration is coming from under the seat, also when looking at the engine you can see there is a slight vibration like there is a misfire going on but i didn't get any codes i tried disconnecting each coil to see if one was faulty they seem to be in good condition.
also forgot to mention if it may help when turning on the air conditioning or heating in the car you can feel the vibration even more, as-well as when i put the car in Sport mode.
please anyone with some insight on this issue would be of great help its becoming annoying i just want it fixed.
when I'm driving i don't feel any vibration smooth as a whistle. (PS there is a difference of before changing all these parts compared to now)
the only thing i don't quite get is even after replacing my harmonic balancer there is a tiny vibration to it, maybe you guys can shed some light on this my mechanic seems to say that its ok and its not the problem and that the harmonic balancer is fine.
I've been doing some research online and seen a few video's talking about the front drive shaft being one issue, I'm starting to think this might be it since the vibration is coming from under the seat, also when looking at the engine you can see there is a slight vibration like there is a misfire going on but i didn't get any codes i tried disconnecting each coil to see if one was faulty they seem to be in good condition.
also forgot to mention if it may help when turning on the air conditioning or heating in the car you can feel the vibration even more, as-well as when i put the car in Sport mode.
please anyone with some insight on this issue would be of great help its becoming annoying i just want it fixed.
Thread Starter
Junior Member
Joined: Jun 2021
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E320 4Matic
Thread Starter
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Joined: Jun 2021
Posts: 15
Likes: 0
E320 4Matic
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Joined: Aug 2004
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From: Southern California
So this is the 3.2L v6 M112 engine connected to the 5 speed 722.6 transmission?
Let's look at all the rotating parts at the front of the engine.
Harmonic Balancer. Replaced.
Tensioner. Replaced.
Pulley, Idler Pulley. Replaced.
Power Steering pump
AC Compressor
Alternator
If you notice more vibration when the AC kicks on, I would suggest checking the AC compressor. Since there is so much room in front of the engine, might as well pull the belt off and check all of the components for any sign of wear in the bearings. Put your hand where the belt normally sits and spin it. Try and feel if it moves smoothly or there is some looseness or grinding sensation. The bearings inside do not last forever and being exposed to the engine heat, I am sure after 17 years the grease inside is no good anymore. Fyi, I have the same engine and I have replaced everything listed above except the alternator....yet.
Let's look at all the rotating parts at the front of the engine.
Harmonic Balancer. Replaced.
Tensioner. Replaced.
Pulley, Idler Pulley. Replaced.
Power Steering pump
AC Compressor
Alternator
If you notice more vibration when the AC kicks on, I would suggest checking the AC compressor. Since there is so much room in front of the engine, might as well pull the belt off and check all of the components for any sign of wear in the bearings. Put your hand where the belt normally sits and spin it. Try and feel if it moves smoothly or there is some looseness or grinding sensation. The bearings inside do not last forever and being exposed to the engine heat, I am sure after 17 years the grease inside is no good anymore. Fyi, I have the same engine and I have replaced everything listed above except the alternator....yet.
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Thread Starter
Junior Member
Joined: Jun 2021
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E320 4Matic
So this is the 3.2L v6 M112 engine connected to the 5 speed 722.6 transmission?
Let's look at all the rotating parts at the front of the engine.
Harmonic Balancer. Replaced.
Tensioner. Replaced.
Pulley, Idler Pulley. Replaced.
Power Steering pump
AC Compressor
Alternator
If you notice more vibration when the AC kicks on, I would suggest checking the AC compressor. Since there is so much room in front of the engine, might as well pull the belt off and check all of the components for any sign of wear in the bearings. Put your hand where the belt normally sits and spin it. Try and feel if it moves smoothly or there is some looseness or grinding sensation. The bearings inside do not last forever and being exposed to the engine heat, I am sure after 17 years the grease inside is no good anymore. Fyi, I have the same engine and I have replaced everything listed above except the alternator....yet.
Let's look at all the rotating parts at the front of the engine.
Harmonic Balancer. Replaced.
Tensioner. Replaced.
Pulley, Idler Pulley. Replaced.
Power Steering pump
AC Compressor
Alternator
If you notice more vibration when the AC kicks on, I would suggest checking the AC compressor. Since there is so much room in front of the engine, might as well pull the belt off and check all of the components for any sign of wear in the bearings. Put your hand where the belt normally sits and spin it. Try and feel if it moves smoothly or there is some looseness or grinding sensation. The bearings inside do not last forever and being exposed to the engine heat, I am sure after 17 years the grease inside is no good anymore. Fyi, I have the same engine and I have replaced everything listed above except the alternator....yet.
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Joined: Feb 2017
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From: L.A., Moscow, NYC, San Diego, Baja
1998 E320 Wagon, 2003 W211 E500, 2003 W211 E500, 1999 W210 E55 AMG
When manually shifting geats P to R or D, in my case was the front flex disc (guibo). Upon inspection it looked almost new, but when removed had cracks around every bolt hole. Changed it out and the difference was amazing.
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E320 4Matic
when i bought the car it was driven by an old man he didn't even know what engine mounts where i took out the old mounts lets just say the metal was all chewed up there was no mounts left -_-.
it was actually a good thing it wasn't driven for 2 years
