11 12 000 Removing and installing/sealing cylinder head cover (N55 Hybrid)

WARNING: This page does not describe the selected car, but rather 50 other vehicles, including the 2016 BMW M5, 2016 BMW ActiveHybrid 5, 2016 BMW 550i xDrive, 2016 BMW 550i, and 2016 BMW 535i xDrive. However, it is still accessible from the selected car via links, so may be relevant.

WARNING:

High-voltage hazard!

The following must be strictly observed prior to starting work :

DISCONNECTING HIGH-VOLTAGE SYSTEM FROM POWER .
Observe SAFETY INFORMATION for handling electric vehicles.

Necessary preliminary work:

Remove right TRAILING LINK .
Remove middle firewall SOUND INSULATION .
RELEASING ENGINE WIRE HARNESS in the area of the cylinder head cover.
Disconnect PRESSURE LINES .
Remove CLEAN AIR PIPE .

Release screws (1).

Remove flange (2).

Installation note:

Replace sealing flange.

Fig 1: Identifying Flange And Screws

G09919455

Courtesy of BMW OF NORTH AMERICA, INC.

Press and hold down the unlocking device on the vacuum line (1) on the vacuum reservoir (cylinder head cover) in the direction of the arrow.

Detach vacuum line (1) in upward direction.

Fig 2: Unlocking/Detaching Vacuum Line

G09919456

Courtesy of BMW OF NORTH AMERICA, INC.

IMPORTANT: Do not loosen the engine vent line (4) on the cylinder head cover.

To dismantle the engine vent line, loosen the screws on the air intake system (3).

NOTE: When changing a faulty engine vent line, the clutch on the coupling on the cylinder head cover may be broken open.

Fig 3: Identifying Engine Vent Line And Screws On Air Intake System

G09919457

Courtesy of BMW OF NORTH AMERICA, INC.

Fig 4: Cylinder Head Cover Bolts Tightening/Loosening Sequence (N55 Hybrid)

G09919458

Courtesy of BMW OF NORTH AMERICA, INC.

Release screws of cylinder head cover from outside inwards in 1/2 turns.

Remove cylinder head cover.

Replace all gaskets.

Fig 5: Cylinder Head Cover Bolts Tightening/Loosening Sequence (N55 Hybrid)

G09919459

Courtesy of BMW OF NORTH AMERICA, INC.

Fit cylinder head cover.

Insert screws of the cylinder head cover by 1/2 turn.

Tighten fit screws (1) using 8.5 Nm.

Tighten positional screw (2) using 8.5 Nm.

Tighten remaining screws of cylinder head cover in sequence 3 to 23.

Tightening torque: 11 12 4AZ .