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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 03-23-2013, 02:24 PM   #1
bmwcanman
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Join Date: Oct 2012
Location: Canada
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My Ride: 2004 330ci m-sport
Oil Leak - front passenger side

I've been trolling the forums and I can't find the right answer to my oil leak. The leak is not the valve cover gasket or the exhaust cam sensor.

The pictures below are taken standing at the front on the car. The first one is a close up of what I believe to be the source of the leak. It is a similar looking device to the cam shaft sensor except it has a tube running into it. The tube running into the device also shows in the third picture with the black cap on the top of it in the front left of the picture.

Anyone know what this is or if I should be looking at somewhere else?
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Old 03-23-2013, 02:27 PM   #2
04330ciZHP
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Join Date: Mar 2012
Location: Houston
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My Ride: E46 E90
How well was the engine bay cleaned after the valve cover gasket and exhaust can sensor o ring? Could be a/c oil... or residue from other leaks

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Old 03-25-2013, 12:44 AM   #3
bmwcanman
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The residual oil from the other leak was cleaned up as much as possible and has now dried. Therefore, it is very easy to see the difference between fresh oil and the oil that had dried. There is now fresh oil on the swaybar below and splash pan.
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Old 03-25-2013, 12:32 PM   #4
mikeson
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Did you find out and fixed it?
Because I think I have same place leak.
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Old 03-25-2013, 11:24 PM   #5
bmwcanman
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I understand from a BMW mechanic that it is likely the timing chain tensioner which is directly above the compressor hose in my pictures. The tensioner is behind a screw in cover 24 mm he believes. The tensioner has an aluminum washer type seal that likely needs to be replaced.

I have not had the time to verify this information, but it is the best advice I've received so far. I will likely take a closer week next week to verify.
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Old 07-26-2014, 01:05 PM   #6
the xecutionr
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Did you ever get it fixed?

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