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2010 2011 BMW 5 Series Forum F10 N57S shredding serpentine belts |
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12-17-2023, 10:24 AM | #1 |
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Rep 7
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N57S shredding serpentine belts
M550d pre-LCI, so with N57S. engine. Shred two serpetine belts - it has only one long one.
Changed tensioner and checked all the pulleys, all are OK and working smoothly. Noticed that the standard belt is a bit too long and it made contact to tensioner "bolt" i.e. the knob which You use to turn the tensioner. Put a shorter belt. Now that shorter belt been running OK for a month, now noticed that there's rubber pieces at the backside of the belt, like it scrubbing somewhere... Can't see where? Harmonic balancer seems fine also. Any ideas? |
01-31-2024, 10:06 PM | #3 |
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So I have a 2014 535d. I just did the turbo, tensioners, waterpump, pullys shredded 2 belts. Indy shop changed the harmonic balancer/cam pully. Said this was my source of the belt smoking. ...... now 4 days later i think the timing chain tensions shit the bed. trying to figure this one out..... but Id guess you need a new cam pully. Especially if everything else is moving well.
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