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Home >> BMW >> 2021 >> 840i xDrive 2D Convertible >> Repair and Diagnosis >> Engine Performance >> Fuel Delivery >> Fuel System -- Repair (G14, G15, & G16) >> 13 53 Fuel Injectors, Fuel Rail >> 13 53 205 Removing and installing or replacing left high-pressure rail (M850i xDrive coupe/convertible/Gran Coupe sedan) >> Install the high-pressure rail on the left

Install the high-pressure rail on the left

NOTE: TECHNICAL INFORMATION 
When assembling, it is essential to observe screwing sequences and tightening torques.
Failure to comply with the regulations can lead to leaks and damage.
NOTE: The description is provided only at one component. The procedure is the same for all other components.
G15643717Courtesy of BMW OF NORTH AMERICA, INC.
NOTE: TECHNICAL INFORMATION 
Always install the high pressure line or rail free of distortion. To ensure distortion-free installation of the high pressure line and to avoid damaging the thread, it must be possible for both nuts to be screwed on to the injectors easily hand force.
G15643718Courtesy of BMW OF NORTH AMERICA, INC.
TIGHTENING TORQUES SPECIFICATION

Rail to cylinder head cover
M6x25 screw Tightening torque  10 Nm
NOTE: The description is provided only at one component. The procedure is the same for all other components.
TIGHTENING TORQUES SPECIFICATION

Hold-down device to cylinder head cover
screw Tightening torque  13 Nm
G15643719Courtesy of BMW OF NORTH AMERICA, INC.
TIGHTENING TORQUES SPECIFICATION

High-pressure rail to injectors
Nuts Tightening torque  23 Nm
G15643720Courtesy of BMW OF NORTH AMERICA, INC.
TIGHTENING TORQUES SPECIFICATION

Fuel supply line/rail to high pressure pump
Nut tightening torque  30 Nm
TIGHTENING TORQUES SPECIFICATION

Rail to cylinder head cover
M6x25 screw Tightening torque  10 Nm
G15643721Courtesy of BMW OF NORTH AMERICA, INC.

Follow-up work