[urq] alternator whine puzzle (X post) long

Ingo Rautenberg i.rautenberg at waratap.com
Fri Nov 3 15:36:12 EST 2006

MessageHuh?  No, there should be no difference in load when it comes to the alternator whether you're driving or stationary EXCEPT wrt fuel pump.  That will use more power in real-world driving.
  ----- Original Message ----- 
  From: Brandon Rogers 
  To: 'Mark R' ; 'Ingo Rautenberg' 
  Cc: urq at audifans.com ; quattro at audifans.com ; 200q20v at audifans.com 
  Sent: Friday, November 03, 2006 3:17 PM
  Subject: RE: [urq] alternator whine puzzle (X post) long

  yeah I will need to really focus on the alignment over the weekend, or next time I have the time to mess with it.  I don't see, at this point, how it could be anything else...except for maybe some sort of funky flexing going on with the bracket - 

  Question- any reason reving the motor while stationary wouldn't apply the same load to the alt as when driving?  Hopefully I can replicate the noise in the garage.

  Thanks again guys

    -----Original Message-----
    From: Mark R [mailto:speedracer.mark at gmail.com] 
    Sent: Friday, November 03, 2006 12:21 PM
    To: Ingo Rautenberg
    Cc: brogers at terrix.com; urq at audifans.com; quattro at audifans.com; 200q20v at audifans.com
    Subject: Re: [urq] alternator whine puzzle (X post) long

    A mechanical problem has to be belt (pulley) alignment.  He's claims to have clearance and have tried several alternators, inlcuing rebuilts.  I think the alternator itself is ruled out.

    On 11/3/06, Ingo Rautenberg <i.rautenberg at waratap.com> wrote: 
      Must a bearing problem. I mean the only friction contact points are the
      front and rear bearings and (when VR is mounted) the brushes!!!! 
      Unless either the pully or the ventilation blades are actually contacting
      the housing (improper shimming).


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