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Old 01-19-2011, 01:33 AM
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bluebee bluebee is offline
Seek to understand,^Value
Location: San Jose, California
 
Join Date: Mar 2008
Posts: 22,005
Mein Auto: 02 BMW 525i M54 auto 130K
There was a strange post this week where the owner had half of a hydraulic tensioner hanging there ... without the other parts ... so we suspected the previous owner could have started a conversion of mechanical to hydraulic but left it undone ... and didn't add the compressor belt back (if you can believe that).

Anyway, in looking up help for that person, I had to go again to the mechanical to hydraulic conversion kit parts thread and just in case that thread disappears, here are the photos from that thread:

- Changing from Mechanical tensioner to Hydraulic tensioner for your serpentine belt drive

Here is the Hydraulic tensioner from realoem that you will need to buy:
http://www.realoem.com/bmw/showparts...90&hg=11&fg=18

Here is the mechanical tensioner from realoem note: This is just a comparison so dont buy this one)
http://www.realoem.com/bmw/showparts...05&hg=11&fg=18

And, here is a conversion kit from mechanical to hydraulic (although not for the E39) from that thread:
- autohauz mechanical to hydraulic tensioner conversion kit

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