e240 vibration

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apache - 09 Mar 2007 03:30 GMT

e240 1998 auto.at around 1200 and 2000 rpm i have developed a
vibration through the car.it felt like prop uj or bearing vibration
but you dont have to be moving.ive checked the engine and box mounts
and its running smoothly so i assume its fireing on all (12) plugs.ive
code read it and its clear.any ideas?

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roland franzius - 09 Mar 2007 08:29 GMT

> e240 1998 auto.at around 1200 and 2000 rpm i have developed a
> vibration through the car.it felt like prop uj or bearing vibration
> but you dont have to be moving.ive checked the engine and box mounts
> and its running smoothly so i assume its fireing on all (12) plugs.ive
> code read it and its clear.any ideas?

Check the exhaust stability and rubber mounts. Could be a resonance and
this is a long and possibly vibrating part with comparable frequencys:
1200 rpm = 20 Hz.

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Roland Franzius

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Tiger - 09 Mar 2007 15:11 GMT

I would clean the AFM meter... use the AFM cleaner.

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WÇY - 11 Mar 2007 13:10 GMT

>e240 1998 auto.at around 1200 and 2000 rpm i have developed a
>vibration through the car.it felt like prop uj or bearing vibration
>but you dont have to be moving.ive checked the engine and box mounts
>and its running smoothly so i assume its fireing on all (12) plugs.ive
>code read it and its clear.any ideas?

There was an issue in these cars about the harmonic balancer
deteriorating. I seem to recall that the engine would vibrate some
time before it broke up. By then, it was a costly repair.

However, just checking it was simple enough and inexpensive. You say
the engine runs smoothly so this does not seem to be the cause, but I
would check, just in case.

WÇY

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apache - 13 Mar 2007 18:31 GMT

thanks for the response WCY,what is a harmonic balancer and where is
it found-i have not come across this befor

> e240 1998 auto.at around 1200 and 2000 rpm i have developed a
> vibration through the car.it felt like prop uj or bearing
> vibration but you dont have to be moving.ive checked the
> engine and box mounts and its running smoothly so i assume its
> fireing on all (12) plugs.ive code read it and its clear.any
> ideas?

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WÇY - 14 Mar 2007 14:04 GMT

>thanks for the response WCY,what is a harmonic balancer and where is
>it found-i have not come across this before
[quoted text clipped - 5 lines]
> > fireing on all (12) plugs.ive code read it and its clear.any
> > ideas?

Sorry for the delay.

For harmonic balancer, see first
http://en.wikipedia.org/wiki/Harmonic_balancer
then,
http://en.wikipedia.org/wiki/Mercedes-Benz_W210

And you can get an idea.
Hope this has been of help.
WÇY

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