REP-TAT-P-1161-01 Removing the intake plenum

WARNING: This page is about a different car, the 2018 BMW 340i, 2017 BMW 340i, and 2016 BMW 340i. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: Collect and dispose of emerging fluids. Observe country-specific waste disposal regulations.

Unclip tank vent line (1) in the marked area.
Unlock and detach engine ventilation line (2).
Unscrew the bolt (3) and unclip the tank vent line (4) in the marked area.
Remove tank vent line (4).
Unscrew the bolts (5) and set the engine wiring harness aside.
Unclip cable (6) in marked areas.

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Loosen tank vent line (1) in marked area from intake plenum.
Unlock closure (2) and detach the coolant line.

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Unlock and disconnect connector (1).
Unclip the wiring harness in the marked areas.

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Loosen screws (8).
Loosen screws in the order (7) to (1).
Slightly raise air intake header.

Fig 1: Air Intake Header Screws Loosening Sequence

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Unlock the closure (1) and detach the coolant feed line.
Unlock the closure (2) and detach the coolant return line.
Unclip the wiring harness from the clamp (3).

NOTE: Additional coolant can leakage. Make sure that no coolant enters the intake port of the cylinder head.

Remove intake plenum

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Courtesy of BMW OF NORTH AMERICA, INC.