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      06-28-2020, 09:06 AM   #1
Letsgo
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Drives: 2011 BMW X5 35D
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Any idea where I am leaking oil from (pics)?

2011 X5 Diesel, 120k miles.

View from inside fender (pass side)









View from top of engine (pass side)



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      06-29-2020, 05:09 AM   #2
Letsgo
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After digging around it looks like it could be a seal. I might have to clean everything up as best as I can drive the car a bit and see where exactly the oil is coming from:

Quote:
Seal leak on charge air hose between intercooler and turbo.
https://xoutpost.com/748328-post3.html

This thread refers to the seals in #12:





The best thread I found refers to to oil return line:

https://www.e90post.com/forums/showthread.php?t=1576564


Looks like E90post is the best technical resource for these engines due to higher volume of participants for anyone looking for info in the future for their x5 35d.
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      06-29-2020, 09:23 AM   #3
Colodano
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Lots of possibilities, and there is oil on a bit of everything from your fill cap on down. Personally, I would say get a good steam clean done on the engine bay, and then drive it a bit to track it down.
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      06-29-2020, 03:36 PM   #4
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I tracked my turbo oil leak by adding a bottle of UV dye after cleaning the engine bay with a pressure washer (after taking precautions by taping off all the electricals of course). Then with a UV light, I found the leak coming from the charge pipe connecting to the intercooler.

https://www.autozone.com/test-scan-a...B&gclsrc=aw.ds

Make sure the oil is relatively clean though. I did this initially after 7k on the oil and it was too dark for the UV dye to fluoresce. With a fresh oil change it worked like a charm.
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