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DIY: Do It Yourself
Post here to share or improve your wrench turning skills! All BMW E46 DIY tips, tales, and projects discussed inside. Learn to work on your car and know the right BMW parts you will need!

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Old 05-16-2015, 09:30 AM   #1
paraklas
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DIY: S54 Chain Tensioning piston Install on M54

Finally decided to change my M54 camshaft chain tensioner with one from the S54. The benefit from this is a stronger push to the chain guide, making the rotation of the chain smoother (less slack?). For sure, once installed, I noticed the engine running just a tad less noisy.

The S54 tensioner is pricey; $250, however I managed to get a deal from ebay for only $50. A new crush washer is mandatory which I purchased from dealer $1.

TIS Instructions:
Tensioner.pdf

Tools:
1/2" ratchet
32mm socket
10mm socket (for the windshield reservoir)

Lots of rags, some oil will spill once the old tensioner is almost removed.

The new (used) S54 tensioner:


Top



32mm socket


Old one still on engine:


Closer with the windshield reservoir removed


Cleaned and ready for install with new crush washer


I tried a lot of extensions, angles, etc, but this is the only thing needed to get the old one out/new one in


RAGS


After some time, it broke loose and removed. Set them side to side: (Left: S54 / Right: M54)








Getting ready for install:


The tensioner is spring loaded, so you need to tighten it while pushing it in.
Used one hand to push and the other to twist
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Old 05-16-2015, 09:51 AM   #2
Kye7
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Cool and easy DIY.

Why exactly did you do this, were you having problems?
Any other benefits to this?
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Old 05-16-2015, 09:55 AM   #3
paraklas
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No problems at all, just read a bunch of topics regarding this "upgrade" basically. Found a cheap part (was not going to spend $250 for this) and did it. For added benefits, I will post again after I put some miles on it. Right now I just started the car to check for leaks etc.
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Old 05-16-2015, 11:32 AM   #4
Solidjake
Zero. Leaks.
 
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Any reason for the height difference? (from the base of the sensor to the tip?
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Old 05-16-2015, 12:28 PM   #5
paraklas
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Different construction entirely. The pistons are different as well, the springs inside are different as well. For sure the spring tension is around 50% more than the M54 version.
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Old 05-16-2015, 12:34 PM   #6
Solidjake
Zero. Leaks.
 
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Gotcha, thanks man. Good guide
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Old 05-17-2015, 02:51 AM   #7
paraklas
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Original thread of inspiration here
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