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Home >> BMW >> 2021 >> 840i 2D Convertible >> Repair and Diagnosis >> Engine Mechanical >> Blowers, Superchargers & Turbochargers >> Turbocharger -- Repair (G14, G15, & G16) (1 Of 2) >> 11 65 Turbocharger >> 11 65 020 Removing and installing/replacing turbocharger (840i coupe and Gran Coupe sedan) >> Installing turbocharger

Installing turbocharger

CAUTION: Heavy component. 
Heavy components can lead to injury or damage. 
  • Remove and install heavy components with the aid of another person/other persons.
NOTE: RISK OF DAMAGE 
Damage of the electric wastegate valve controller. 
Excessive force when removing and installing a jammed turbocharger may damage the electric wastegate valve controller. 
  • Do not pull on the electrical wastegate valve controller or on the coupling rod.
  • Apply force only at the turbine housing and exhaust manifold.
  • Do not pull on the compressor housing.
NOTE: RISK OF DAMAGE 
Lateral forces when installing or removing the turbocharger. 
Damage to the turbocharger. 
  • Do not  lift the turbocharger by the compressor insert when installing or removing it.
NOTE: TECHNICAL INFORMATION 
When replacing the stud bolts, they must be coated with screw locking agent (Loctite 270).
TECHNICAL DATA SPECIFICATIONS

Screw-in depth of upper stud bolts on cylinder head
  Dimension A  30 mm
G14230317Courtesy of BMW OF NORTH AMERICA, INC.
NOTE: RISK OF DAMAGE 
Damage to the surface. 
The use of metal-cutting tools (e.g., emery cloths) for cleaning surfaces can damage them and lead to leaks and/or engine damage. 
  • Do not use any metal-cutting tools.
G14230306Courtesy of BMW OF NORTH AMERICA, INC.
NOTE: RISK OF DAMAGE 
Damage to the surface. 
The use of metal-cutting tools (e.g., emery cloths) for cleaning surfaces can damage them and lead to leaks and/or engine damage. 
  • Do not use any metal-cutting tools.
G14228708Courtesy of BMW OF NORTH AMERICA, INC.
CAUTION: Heavy component. 
Heavy components can lead to injury or damage. 
  • Remove and install heavy components with the aid of another person/other persons.
G14230305Courtesy of BMW OF NORTH AMERICA, INC.
NOTE: Insert nuts in 360 degree increments.
TIGHTENING TORQUE SPECIFICATIONS

Turbocharger to cylinder head
M7
Replace nuts.
1. Snug torque  5 Nm
2. Tightening torque  18 Nm
3. Tightening torque  18 Nm
G15636270Courtesy of BMW OF NORTH AMERICA, INC.
TIGHTENING TORQUE SPECIFICATIONS

Heat shield of turbocharger to cylinder head top
M8X12
Replace screws.
tightening torque  19 Nm
G14230303Courtesy of BMW OF NORTH AMERICA, INC.
TIGHTENING TORQUE SPECIFICATIONS

Turbocharger support to crankcase
M8 x 20
Replace screws.
19 Nm
G14238442Courtesy of BMW OF NORTH AMERICA, INC.
TIGHTENING TORQUE SPECIFICATIONS

Turbocharger to support
M8 x 25
Replace screw.
19 Nm
TIGHTENING TORQUE SPECIFICATIONS

Coolant feed line to crankcase
M6X12 tightening torque  8 Nm
G14238441Courtesy of BMW OF NORTH AMERICA, INC.
TIGHTENING TORQUE SPECIFICATIONS

Coolant feed line to crankcase
M6X12 tightening torque  8 Nm
TIGHTENING TORQUE SPECIFICATIONS

Coolant return line holder to crankcase
M6X12 tightening torque  8 Nm
G14238436Courtesy of BMW OF NORTH AMERICA, INC.
NOTE: TECHNICAL INFORMATION 
Observe the sign in the engine compartment! Only fill with approved engine oil of the correct (Society of Automotive Engineers) viscosity grade.
G14229920Courtesy of BMW OF NORTH AMERICA, INC.
TIGHTENING TORQUE SPECIFICATIONS

Oil feed line for turbocharger to crankcase
M6 x 12
Replace sealing ring.
tightening torque  8 Nm
G14238443Courtesy of BMW OF NORTH AMERICA, INC.

Follow-up work