11 65 020 Removing and installing/replacing exhaust turbocharger (N20)

WARNING: This page is about a different variant/trim than selected.

WARNING: The module consists of exhaust turbo charger and exhaust manifold.

Necessary preliminary tasks:

Remove left trailing link .
Remove clean air pipe See 11 15 001 REMOVING AND INSTALLING/REPLACING THE ENGINE VENTILATION LINE WITH AND WITHOUT HEATING ELEMENT N20) ; 13 71 155 REMOVE CLEAN AIR PIPE (N20) and 13 71 165 REMOVING BOTTOM CLEAN AIR PIPE (N20) .
Drain coolant.
Remove EXPANSION TANK .
Remove CHARGE AIR COOLER .
Remove the CATALYTIC CONVERTER .
Drain ENGINE OIL .

NOTE: The overview shows the removed engine for better clarity.

Release sheet metal nuts (1).

Unfasten screws (2).

Remove heat shield (3).

Fig 1: Identifying Heat Shield, Sheet Metal Nuts And Screws

Disconnect vacuum hose (1) from vacuum line.

Disconnect plug connection (2) on blow-off valve.

Fig 2: Identifying Plug Connection On Blow-Off Valve

Unlock retaining clip (1) with a screwdriver in direction of arrow and hold.

Pull off retaining clip (1) with suitable pliers in direction of arrow.

Pull off wastegate linkage (2) from wastegate flap.

Fig 3: Pulling Wastegate Linkage From Wastegate Flap

Release screws (1).

Tightening torque: 11 65 4AZ .

Remove vacuum unit.

Fig 4: Identifying Vacuum Unit Screws

Unclamp engine wiring harness (1) from bracket.

Release screw (1).

Tightening torque: 11 00 2AZ .

Fig 5: Locating Bracket, Engine Wiring Harness And Screw

Release screw (1).

Release oil return pipe (3) and place to one side.

Unfasten screws (2).

Tightening torque 11 42 6AZ .

NOTE: Replace gasket.

Fig 6: Identifying Oil Return Pipe And Screws

Release screw (1).

Tightening torque 11 42 6AZ .

Remove oil return line (2).

Installation note:

Replace O-ring.

Fig 7: Identifying Oil Return Line And Screw

Release screw (1).

Tightening torque 11 53 10AZ .

If necessary, use appropriate tool to loosen coolant return line (3) and coolant flow line (2) at connection point.

Installation note:

Replace sealing rings.

Fig 8: Identifying Coolant Return Line, Coolant Flow Line And Screw

Release screw (1).

Tightening torque: 11 42 4AZ .

If necessary, use appropriate tool to loosen coolant return lines (2) at connection point.

Installation note:

Replace sealing ring.

Fig 9: Identifying Oil Feed Line And Screw

Fig 10: Exhaust Manifold Flange Nuts Tightening/Loosening Sequence

Release nuts (1 to 10).

Tape off engine support at front right with suitable auxiliary materials (risk of damage!).

Push exhaust turbocharger (1) carefully toward the front in direction of arrow.

Fig 11: Pushing Exhaust Turbocharger

Turn exhaust turbocharger (1) and remove from above.

Fig 12: Identifying Exhaust Turbocharger

NOTE: Oil supply line (2) can only be replaced after removal of the turbocharger.

Release screw (1).

If necessary, use appropriate tool to loosen oil feeder lines at point of connection (2).

Fig 13: Identifying Oil Feed Line And Screw

Installation note:

Replace all sealing rings (1).

Renew sealing rings of coolant RETURN and FEED LINES .

Fig 14: Identifying Sealing Rings

Installation note:

Replace all graphite seals (1).

Position turbocharger on cylinder head and hold in place with two bolts.

Fig 15: Identifying Graphite Seals

Fig 16: Exhaust Manifold Flange Nuts Tightening/Loosening Sequence

IMPORTANT: The module consists of exhaust gas turbo loader and exhaust gas manifold and must be installed stress-free.

Torque and torque sequence must be observed without fail.

Tightening torque: 11 65 1AZ .

Join all flange nuts to a torque of 8 Nm in sequence (1 to 10).
Tighten all flange nuts to a torque of 13 Nm in sequence (1 to 10).

Installation note:

If screw (1) cannot be secured, holder must be released.

Secure screws (1).

Tightening torque: 11 65 6AZ .

Fig 17: Identifying Oil Return Line And Screws

Assemble engine.

Observe BMW Diagnostics System instruction.

Carry out BMW leak test for intake system.