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Thread: Guide/Idler Pulley Missing

  1. #1
    Join Date
    Nov 2018
    Location
    United Kingdom
    Posts
    1
    My Cars
    2000 BMW E46

    Guide/Idler Pulley Missing

    My e46 M54 engine has a whining noise that goes with the pedal. Based on my research on the net, some mentioned that the cause might be the idler/guide pulley and or tensioner pulleys. So when I checked youtube and Bentley manual the location of the pulleys, I found out that I don't have idler pulley. I am not sure if the previous owner removed this or it comes as standard. My car is running fine apart from the whining noise. So do I need to put back the idler pulley or leave as it is? Any help will be much appreciated.

  2. #2
    Join Date
    Apr 2015
    Location
    Netherlands
    Posts
    164
    My Cars
    2000 E46 328i
    Are you sure it's not there? I can't imagine the belt stays on or the waterpump and alternator are driven without that pulley...

    Google 'M54 accessory belt' to see an image of where the pulleys are.

  3. #3
    Join Date
    Oct 2003
    Location
    Seattle
    Posts
    5,776
    My Cars
    99 M3

    Guide/Idler Pulley Missing

    Use the last seven of the VIN in www.realoem.com and review the various diagrams and related parts lists for the exact list of your cars parts.

    Some E36 M52s also we’re not fit with an idler pulley, just the tensioner and a shorter belt.
    Perhaps yours is similar.


    Sent from my iPhone using Tapatalk
    Last edited by bluptgm3; 11-23-2018 at 10:18 PM.

  4. #4
    Join Date
    Jul 2008
    Location
    Osnabrock, ND
    Posts
    961
    My Cars
    2004 325xi,2004 545i SMG
    yes, they came both ways, I think if I remember correctly. don't recall which ones did not come with the idler though but it used to piss off the parts guys when we ordered parts.
    Level 1 Certified BMW tech.

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