Belt keeps breaking

2007 BMW 335
130,000 MILES • 3.0L • 6 CYL • TURBO • 2WD • MANUAL
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JOSHUAFENDER755
  • MEMBER
  • 34 POSTS
Replaced belt and belt tension-er both were one month old and the belt broke again. This is a major problem with this type of vehicle as it tends to push past the crankshaft seal and into the timing chain. Please help before it gets really costly.
Aug 7, 2017 at 9:40 PM
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STRAILER
  • ✓ASE Certified Mechanic
  • 54,832 POSTS
  • ASE Certified Mechanic
Hello,

Something must be locking up or very hard to turn. I would remove the belt and spin each accessory by hand to see if you can find the problem.

Here is a video to show you what I am talking about.

https://youtu.be/gblcSbyGgv4

Please let us know what you find.

Cheers, Ken
Aug 10, 2017 at 10:45 AM
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