BMW E46 323ci Old tension pulley vs. new tension pulley
Here you can see the difference between an old tension pulley and a new tension pulley. As you can hear, the old bearing makes scratching sounds ...
New vs. Old auto tensioner pulley
Replacing my auto tensioner pulley on my 2006 Mazdaspeed 6. Engine had a rattle noise when blipping the throttle or engaging the ac sometimes ...
BMW E46 323ci Old belts and broken tension pulleys
Here is another video showing the sound of broken tension pulleys and old belts. It's a loud rattling noise and it's almost away when the ...