E46Fanatics - View Single Post - Strange Engine Clonk. Idler? Water Pump? Tensionser? wtf? [With Video]
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Old 12-06-2012, 03:49 PM   #14
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Join Date: Jul 2012
Location: Liverpool
Posts: 1,524
My Ride: 320i SE Coupe
Originally Posted by timworx View Post
Problem has been solved:
While the tensioner pulley does seem as though it is due for replacement soon, it was NOT the cause of this issue.

I was going to mention the "far fetched" idea earlier that there could possibly be something on the belt, causing tension to build and release every time it goes over a pulley. But I figured people would think I was crazy.

Well, that turned out to be the problem. The cause was a sh*tty Continental belt from PelicanParts.com. I looked at it after I got it off and you can see buildup on the grooves from the manufacturing process.
Went around the corned to Advance Auto for a new one and low and behold; no more horrendous sound.
Jeez. That sucks big time. Who the hell would suspect a new belt to behave that way? Glad you sorted it out.
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