Removing and installing/replacing exhaust turbocharger, right, cylinders 1-4 (S63T2) (X6 M)

Special tools required:

2 249 171

IMPORTANT: Risk of fire if engine oil pipes are leaking.
Risk of mixing up vacuum hoses.

Necessary preliminary tasks:

Remove CATALYTIC CONVERTER for cylinders 1-4.
Remove CLEANING AIR PIPE .

Release clamps (1).

Detach coolant hoses (2) from exhaust turbochargers.

Courtesy of BMW OF NORTH AMERICA, INC.

Release and detach crankcase ventilation line (1) then place to one side.

Remove connector (2) for oxygen sensors from holder.

Unclip vacuum line from holder (3).

Remove bolts (4) and feed out heat shield.

Graphic without charge air cooler.

Courtesy of BMW OF NORTH AMERICA, INC.

Release screw (1) with a suitable tool.

NOTE: Oil return pipe (2) can only be removed with turbocharger.

Tightening torque 11 42 6AZ .

Courtesy of BMW OF NORTH AMERICA, INC.

Release screw (1).

Tightening torque 11 42 5AZ .

Release banjo bolt (3).

Tightening torque 11 42 4AZ .

Installation note:

Replace sealing ring.

Courtesy of BMW OF NORTH AMERICA, INC.

Release screw of V-band clamp (3).

Open V-band clamp (3).

IMPORTANT: Do not mechanically deform oil return line.

Remove turbocharger with oil return line in upward direction.

Courtesy of BMW OF NORTH AMERICA, INC.

Release screws (1).

Tightening torque 11 42 8AZ .

Remove oil return pipe (2).

Installation note:

Replace seal .

Courtesy of BMW OF NORTH AMERICA, INC.

IMPORTANT: A deformed oil return pipe can result in leaks. Risk of fire if an engine oil pipe is leaking.

The thermal linear compensators (see arrows) on the oil return pipe (1) must not be mechanically deformed.

Installation note:

Moisten oil return pipe at end with engine oil.

Courtesy of BMW OF NORTH AMERICA, INC.

IMPORTANT: The O-rings (1) can easily fall into the oil duct.

Installation note:

If necessary, remove OIL RETURN COVER .

Replace O-rings (1) on oil return cover (2) .

Courtesy of BMW OF NORTH AMERICA, INC.

Replace gaskets (1).

Courtesy of BMW OF NORTH AMERICA, INC.

Position turbocharger with oil return line on exhaust manifold.

Position V-band clamp (2).

Tightening torque 11 65 1AZ .

Courtesy of BMW OF NORTH AMERICA, INC.

Fit special tool 2 249 171 on left and right cylinder head covers with screws (1 and 2).

Courtesy of BMW OF NORTH AMERICA, INC.

Installation note:

Both exhaust turbochargers must be adapted to the catalytic converters.

Exhaust turbocharger (2) must be aligned in the vertical axis on the left and right.

Move screw (1) of setting gauge up against exhaust turbocharger (2) by hand.

Adjust exhaust turbocharger (2) parallel to setting gauge.

Secure V-band clamps.

Courtesy of BMW OF NORTH AMERICA, INC.

Screw connection of V-band clamp is too loose:

If you can see a gap between the ends of the Vband clamps, release and then repeat the screw connection.

Tightening torque 11 65 1AZ .

Courtesy of BMW OF NORTH AMERICA, INC.

Screw connection of V-band clamp is too tight:

If the ends of the V-band clamp are positioned under each other, release and then repeat the screw connection.

Tightening torque 11 65 1AZ .

Courtesy of BMW OF NORTH AMERICA, INC.

Installation note:

The ends of the V-band clamp must rest parallel to each other.

Tightening torque 11 65 1AZ .

Courtesy of BMW OF NORTH AMERICA, INC.

Assemble engine.

Check vacuum connections.

Observe BMW diagnosis instructions.

Complete vehicle
Power train
Engine electrical system
Air supply
Charging pressure control