Took a year but finally got one!

[vmansmann]

I just purchased a 97 540i w/45K mi and love it. Does anyone know what would cause a vibration between 1000 and 3000 rpms? No vibrations when idling and no vibration after 3000 rpms. It seems like it doesn't want me to be a wimp and just "put the pedal to the metal".

Thanks,
Vaughn [bmwkick]

 

[///M SPEED]

Not sure of the vibration (maybe a bent rim or wheel out of balance?), but congrats on the purchase and a warm welcome to the board...

 

[Big Daddy]

Yes congrats and welcome! I agree with Scott, check the rims for a bent one, you might have your drive line bearings checked too. I had one go bad on my 750iL. Could really feel it at 3-4k rpm and when pulling hard.

 

[vmansmann]

Thanks for the warm welcome. The vibration does occur slightly while driving, but I can feel it when just sitting still with the vehicle in park or neutral. Could it be bad spark plugs or wires?

Thanks again for the feedback...

 

[Chesty Bonds]

Are you sure it's not just the delivery of the power from the M62 V8??

My dad's 740il runs just beautifully but from about 2-3,000 RPM the engine doesn't so much vibrate as sort of 'pulsate' the car. It's hard to explain but I get the feeling that this is what you mean by the vibration. I think it's just the way that this magnificent engine delivers it's stuff - you literally feel the engine pouring on the power. If you're worried then check it into a BMW service station or a VERY trusted mechanic and have them run it over for you. Could be some worn engine mounts perhaps.

But I really think it's just the nature of the engine... Congrats on the purchase.

 

[Montana]

I've heard it is natural for the V8 and maybe others to have a "limp" at certain rpms. You may want to check if someone put a lightweight flywheel and/or pulleys on it. That may cause problems since they act as a harmonic dampeners in concert with the crankshaft. That could easily be the problem if it was replaced with non-stock (from what I understand).