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Old 04-09-2008, 02:56 PM
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Join Date: Mar 2005
Location: Bern, Switzerland
Posts: 713
Causes of engine vibration

There is some discussion about this in my thread here

I would like to start a comprehensive list of causes of engine vibrations at low RPM. So I'll start with the most common, please chime in with your personal experience.

Rack dampener pin (turbo OM617)
Injector spray pattern
Pre-chamber problems (loss of ball)
Delivery valve sticking/ improper seating
Improper valve lash
Injection pump malfunction (wear/misadjustment)
Air in fuel system
Broken engine mount
Engine balance

What am I missing in this list.

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Old 04-09-2008, 03:07 PM
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Join Date: Sep 2001
Location: central Texas
Posts: 17,277
Engine balance due to the vibration dampner on the front crank rotating ( to improper position relative to the crank ) due to broken key or pin...

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