Replace Turbo Oil Return Components

2011 BMW 550I

97,000 MILES • 4.4L • V8 • TURBO • 2WD • AUTOMATIC

BMW 550I

MEMBER
20 POSTS
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Hi,

I have the 2011 N63 4.4L twin turbo engine, and I have confirmed there is oil leaking between the turbo chargers and the top of the engine valley. The source of leakage appears to be associated with the common oil return line components from the turbo chargers. Can you please supply the work instructions for disassembly, replacement of the return oil cover, lines, gaskets, o-rings, etc?

Mar 3, 2022 at 3:48 PM

BORIS K

CERTIFIED EXPERT
836 POSTS

Hello,

To access the oil drain block you will need to remove both turbos, the exhaust manifolds and valley pan.

A good video on a complete engine teardown is below.

https://youtu.be/RqliaSI7T60

Attached please find images for the vacuum system, torque specifications and the removal of the left turbo, the sequence for the right turbo will be the same.

Please let us know how you get along.

Cheers, Boris

Images (Click to enlarge)

Mar 4, 2022 at 8:07 AM

BMW 550I

MEMBER
20 POSTS

Thank you for the helpful details. Can you please confirm the torque value for the coolant to turbo hollow bolt (it maybe16Nm)?Can you please confirm the torque value for the exhaust manifolds to the heads?

Mar 4, 2022 at 11:47 AM