<e28> Vibration at speed, rough idle

["Georg Taht" <tfam@xxxxxxxxxxx>]

Tony,

In reply to the below:

Steering wheel vibration on E28's is a common problem.  Even the slightest
imbalance can cause a vibration. But the main culprit are the thrust arm
bushings.  I have replaced mine with a 750iL equivalent and my vibrations
have gone away almost completely.  My BMW club members also tell me that the
type of wheel used may be contributor.

As far as the rough idle goes,  the M30 engine in the E28 has never been
smooth at idle.  You can come close but there will always be some roughness.
I have spent hours tweaking the fuel injection and have come close. When
everything is good you will feel a slight irregular vibration in the shifter
and a occasional miss at the exhaust pipe.

Georg
87 535is
tfam@domain.elided


>On my '86 535i, I get a vibration through the
>steering wheel above 75mph or so. It doesn't shake the
>whole car, I just feel it through the wheel. I
>occasionally feel a little vibration/play in the wheel
>at low speeds, but mostly just at higher speed.

  >Any thoughts?

  >One more thing... My idle is a bit rough. It doesn't
>vary between 500-1500 like I've heard some people
>describe, it's just rough.  Is this normal? I just had
>$2700 worth of engine work done (camshaft, rocker
>arms, valve job, timing chain sprockets, cap&rotor,
>etc..) and I was assuming(hoping) that it would be
>smooooth.
  >Thanks again.

  >Tony Z, Raleigh, NC, USA

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