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Old 01-20-2011, 08:30 AM
cn90 cn90 is offline
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Location: Omaha NE
Join Date: Mar 2006
Posts: 14,352
Mein Auto: 1998 528i 5-sp 140K+
For those of you who have curious mind, you may want to read the following article discussing the pros and cons of mechanical vs hydraulic tensioners.

Those of you with engineering background will like this article. Also, for those who want to read about Hydraulic Tensioner: it is basically like a car suspension with a Spring + Strut (to absorb sudden shock).

In the Hydraulic Tensioner, the Spring maintains the proper tension. The hydraulic oil works like a Strut to absorb sudden changes in TB tension.

Here is a very good link to read on how Hydraulic Tensioner works.
I also uploaded this pdf file to this forum in case they delete the pdf from their website in the future!
See attachment below for pdf.

I am attaching a picture for a quick read:

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Last edited by cn90; 01-20-2011 at 08:32 AM.
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