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1996 E320, 2005 Toyota Camry
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1,810 Posts
Discussion Starter #1
I have an '85 190D 2.0 ltr w/ 58K miles on it. It's like driving a new car and I love it. However, at idle, there is so much VIBRATION coming through the body. Idle speed seems right, so I'm wondering if it is the motor mounts. They are not particularly compressed, but after 25 years could they be dried out and hard, causing more vibration than they should? I'd appreciate others' experience and view on this.
Hemersam
 

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'01 SLK230,'93 190E 2.3, 1971 LS5 Corvette Convertible
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2,172 Posts
I bought my '93 new and when I replaced the motor mounts 3 years ago it made a huge difference at idle...very smooth. I also changed the transmission mount, it was broken.
 

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'85 2.3-16 '99 C280 '11 GLK350
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4,805 Posts
25 year old motor mounts? I'd say you got your money's worth. They probably should have been changed out at 10-15 years. The engine mounts are pneumatic in design, not just rubber. I would strongly suggest that you also have all the suspension parts examined, like the rear subframe bushings, if the motor mounts weren't touched by the service folks till now.
 

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1984, 201.122, OM601.921, G717.410
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504 Posts
Engine mounts for 1984 and part of 1985 OM601 are NOT pneumatic (gas) or hydraulic (fluid), but just rubber (solid). With the solid engine mounts, on the left side there is also a cylindrical dampener (like shock absorber). And, there is another dampener on the serpentine belt system.
 

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1984 190D 2.2
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2,458 Posts
So how can you tell when to replace the solid rubber ones?
 

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1996 E320, 2005 Toyota Camry
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1,810 Posts
Discussion Starter #7
I had the motor mounts changed out today and there is a vast improvement---very, very little vibration felt in the car now. I thank you all for your input; it is very much appreciated.
Hemersam
 

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1996 E320, 2005 Toyota Camry
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1,810 Posts
Discussion Starter #8
I'm back for another question: what function does the motor dampener accomplish? Thanks.
Hemersam
 

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1991 190e 2.6 automatic
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760 Posts
i just noticed my motor mounts are gone probably too.. the other day i put it in reverse, and i felt a lot of vibration. put it back in P and its less noticable. And it seemd to get a lil worse, now i can feel it in D too but not as bad as R. Im gonna replace 2 motor mounts and 1 tranny mount, just because in 9 years of owning it, i never replaced any of them.
 

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1984 190D 2.2
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2,458 Posts
i just noticed my motor mounts are gone probably too.. the other day i put it in reverse, and i felt a lot of vibration. put it back in P and its less noticable. And it seemd to get a lil worse, now i can feel it in D too but not as bad as R. Im gonna replace 2 motor mounts and 1 tranny mount, just because in 9 years of owning it, i never replaced any of them.
Check your transmission fluid level. Mine had a leak and was low, so the car would vibrate in drive and reverse, but not in park.
 

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1984, 201.122, OM601.921, G717.410
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504 Posts
Given the position of the dampener / shock absorber, I believe it compensates for rotational torque. Since the left side lifts up on acceleration, it would hold it down.
 
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