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  #1  
Old 06-09-2003, 03:16 PM
Dimmi
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Unhappy Tyres change resulted in a shaking steering wheel

Hi,

I hope you can help me. I own a Mercedes E280, 1996 (W210), driven, in total, 43000 Km.

After I change my tyres (to Pirelli P6000 215 16 55 93 W) my steering wheel started to shake at speeds around 90 km/h, higher speeds where just fine (tried speeds up to 225 km/h). Consequently, I went to the shop and re-balanced the wheels (after 700 km). In fact, both front wheels needed re-balancing.

Now to the problem:

The shake is still there. The good news (?) is that it is less than prior to the re-balancing. However, compared with my old tries (same brand and dimensions as the new one) the steering wheel is still shaking around 90 Km/h.
I’ve tried to put the rare wheels in the front wheel position of the car. Did not help!

Can there be something else that is faulty on my car? Do a need to re-balance aging ?

Thanks in advance,
Dimitris

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  #2  
Old 06-09-2003, 03:30 PM
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Did you have static or dynamic wheel balancing done?...meaning, weights on the inside only or outside and inside. Also, what tires are you running ?
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  #3  
Old 06-09-2003, 03:30 PM
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Oh..and Welcome ! post often!
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  #4  
Old 06-09-2003, 04:55 PM
Dimmi
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Unhappy

Outside and inside weights! New Pirelli P 6000 215 95 16 W93
all according to the Car manual.
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  #5  
Old 06-09-2003, 05:15 PM
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I would try and pin point it to one tire .....and then check to make sure its not defective...It happens a lot more than one would think. Good Luck
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2008 S550
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2001 Suburban
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-----------------GO DUKE!-----------------

"It cannot be emphasized too strongly or too often that this great nation was founded not by religionists, but by Christians; not on religion, but on the Gospel of Jesus Christ. For that reason alone, people of other faiths have been afforded freedom of worship here." Patrick Henry 1776
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  #6  
Old 06-09-2003, 05:31 PM
Dimmi
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Unhappy

One would like to think that Pirelli tyres are of the highest quality since they do not come cheap. Nevertheless, since I have one spare tyre (the reserve) identical to the other ones mounted on the car, I will try to change one tyre at I time.

Thanks !
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  #7  
Old 06-09-2003, 05:54 PM
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Common problem on the 210 chassis is the forward lower control arm bushing. They are hydraulic and allow the tire to move forward and backward even when new. When weak they cause resonant vibrations without any particular reason at some speed usually around 60mph.
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  #8  
Old 06-09-2003, 06:51 PM
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Another issue could be radial force variation/out of round. My '88 Mercedes wheels are "matchmarked", and I assume yours are too. The mark is a faint while "dot" about a quarter inch in diameter on the outside of the rim flange. The red dot on the tire should be aligned to the white dot on the wheel. This assures the minimum out of round and radial force variation for the assembly.

Many tire shops are ignorant of this practice, but the wheel marks can fade to the point where they are very tough to see.

If the tires were accurately dynamically balanced (weights on both the inside and outside of the wheel) on modern equipment in good working order, it could be a radial force variation or out of round condition. A slight out of round - say more than .020" can usually be seen with the tire spinning on the balance machine or just spinning the tires on the front end, but radial force variation in the tire cannot be visually diagnosed.

The Hunter 9700 can measure both wheel out of round and radial force variation and determine whether reindexing the tire on the wheel can improve the situation or whether the tire or wheel must be replaced to bring radial force variation down to the desired 10 pounds of less.

Duke
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  #9  
Old 06-09-2003, 07:26 PM
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Quote:
Originally posted by Dimmi
One would like to think that Pirelli tyres are of the highest quality since they do not come cheap.

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  #10  
Old 06-10-2003, 03:12 AM
Dimmi
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Quote:
Originally posted by stevebfl
Common problem on the 210 chassis is the forward lower control arm bushing. They are hydraulic and allow the tire to move forward and backward even when new. When weak they cause resonant vibrations without any particular reason at some speed usually around 60mph.
How do I resolve this problem? Get new control arm bushing?
Or just ignore the problem.
Can this vibration case any other issues on the car.

Thanks in advance

Dimitris
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  #11  
Old 06-10-2003, 03:28 AM
Dimmi
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Quote:
Originally posted by Duke2.6
Another issue could be radial force variation/out of round. My '88 Mercedes wheels are "matchmarked", and I assume yours are too. The mark is a faint while "dot" about a quarter inch in diameter on the outside of the rim flange. The red dot on the tire should be aligned to the white dot on the wheel. This assures the minimum out of round and radial force variation for the assembly.

Many tire shops are ignorant of this practice, but the wheel marks can fade to the point where they are very tough to see.

If the tires were accurately dynamically balanced (weights on both the inside and outside of the wheel) on modern equipment in good working order, it could be a radial force variation or out of round condition. A slight out of round - say more than .020" can usually be seen with the tire spinning on the balance machine or just spinning the tires on the front end, but radial force variation in the tire cannot be visually diagnosed.

The Hunter 9700 can measure both wheel out of round and radial force variation and determine whether reindexing the tire on the wheel can improve the situation or whether the tire or wheel must be replaced to bring radial force variation down to the desired 10 pounds of less.

Duke

I will check if my rims have this "white dot" and if the tires are aligned accordingly.

Thanks!
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  #12  
Old 06-10-2003, 05:04 AM
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Dimmi,

If your old tyres didn't vibrate and your new ones do......it's the tyre dealers problem.

Make sure they don't wriggle out of it !
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  #13  
Old 06-10-2003, 10:23 AM
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"After I change my tyres (to Pirelli P6000 215 16 55 93 W) my steering wheel started to shake at speeds around 90 km/h, higher speeds where just fine (tried speeds up to 225 km/h). Consequently, I went to the shop and re-balanced the wheels (after 700 km). In fact, both front wheels needed re-balancing."

Curiously, this is exactly the one model tire I have owned I was never able to get properly balanced - on my '88 Integra. They were harsh riding and shook the steering at freeway speeds. Unfortunately, they also wore like iron, so I lived with them a long time.

On the plus side, they handled great and were confidence-inspiring on curvy mountain roads, where I do most of my driving.

The conclusion of the balancing tech I spent most of one afternoon with, is that the tires were from a batch with a large number of defects. He did not possess the more sophisticated equipment available today that might have been more specific.

Steve
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  #14  
Old 06-10-2003, 03:22 PM
Dimmi
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Great that so many people take the time to consider various types of resolutions. Nevertheless, I vent back to the shop and check the tires if they needed re-balancing. Unfortunately the tires where not un-balanced. The sad thing, from my point of view, is that I purchased the tyres from the Internet. Consequently, I cannot really return them to the supplier (not easily i.e.). So probably the tyres are not of the best quality or/and I have another issue with my car that I have not notice prior to the tyre change.
I will try to replace each wheel with the spare tyre and see if I can isolate the tyre that cases the problem, given that there is only one tyre that is faulty.

Or just maybe leave the car at the Mercedes shop and cancel my vacation
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  #15  
Old 06-11-2003, 12:24 PM
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Man, there are alot of threads on wheel vibration.......

I've found that having the front wheels/tires "finish" balanced (as the dealer calls it) by spinning them while on the car has cured a persistent vibration.

Cheap and easy!

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