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Installing both cylinder heads

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Installing right cylinder head 

Tightening right cylinder head 

Tightening the right cylinder head 

Fig 1: Right Cylinder Head Screws Tightening Sequence
G14252143Courtesy of BMW OF NORTH AMERICA, INC.
TIGHTENING TORQUE SPECIFICATIONS

Cylinder head bolt
M11
Replace screws.
Joining torque  30 Nm
1. Angle of rotation  90°
2. Angle of rotation  140°

Fastening cylinder head bolts on timing case cover 

TIGHTENING TORQUE SPECIFICATIONS

Cylinder head bolt to timing case cover
M8x30 tightening torque  23 Nm
G14252014Courtesy of BMW OF NORTH AMERICA, INC.

Turn the intake camshaft back by 180° 

G14240065Courtesy of BMW OF NORTH AMERICA, INC.

Mounting the special tool on the processed surface of the camshaft 

G15066980Courtesy of BMW OF NORTH AMERICA, INC.
TIGHTENING TORQUE SPECIFICATIONS

Exhaust manifold
M8x40 screw
Replace screw.
tightening torque  25 Nm
Angle of rotation  45°

G15067053Courtesy of BMW OF NORTH AMERICA, INC.

Install both VANOS adjusters (cylinder head disassembly, bank 1) 

Installing special tool for fixing camshafts on bank 1 (VANOS disassembled) 

G15175814Courtesy of BMW OF NORTH AMERICA, INC.

G14253614Courtesy of BMW OF NORTH AMERICA, INC.

Installing the slide rail of cylinder bank 1 (removal/installation/replacement of VANOS adjuster) 

TIGHTENING TORQUE SPECIFICATIONS

Collar screw to the slide rail
Collar screw
M6x48
Tightening torque  10 Nm
G14253502Courtesy of BMW OF NORTH AMERICA, INC.

Preloading the timing chain of cylinder bank 1 

NOTE: RISK OF DAMAGE 
Damage to timing chain or timing chain drive. 
Turning the engine without chain tensioner or special tool can result in damage to the timing chain and timing chain drive. 
  • Always turn the engine with the chain tensioner or the special tool.
TIGHTENING TORQUE SPECIFICATIONS

Preload timing chain
tightening torque  0.6 Nm

G14253578Courtesy of BMW OF NORTH AMERICA, INC.

Checking the preload of the timing chain for cylinder bank 1 

NOTE: RISK OF DAMAGE 
Damage to timing chain or timing chain drive. 
Turning the engine without chain tensioner or special tool can result in damage to the timing chain and timing chain drive. 
  • Always turn the engine with the chain tensioner or the special tool.
TIGHTENING TORQUE SPECIFICATIONS

Preload timing chain
tightening torque  0.6 Nm
G14253502Courtesy of BMW OF NORTH AMERICA, INC.

TIGHTENING TORQUE SPECIFICATIONS

VANOS central valve third tightening
VANOS central valve Angle of rotation  30°
G14253585Courtesy of BMW OF NORTH AMERICA, INC.

Install the sealing cap on the cylinder head of cylinder bank 1 

TIGHTENING TORQUE SPECIFICATIONS

Sealing cap to cylinder head
M6x20 screw Tightening torque  9.5 Nm
G14253076Courtesy of BMW OF NORTH AMERICA, INC.

Installing electric coolant pump with holder 

TIGHTENING TORQUE SPECIFICATIONS

Holder of electric coolant pump
M6x16 screw Tightening torque  8 Nm
G15195791Courtesy of BMW OF NORTH AMERICA, INC.

Installing the cylinder head cover on the right 

NOTE: TECHNICAL INFORMATION 
Make sure that there are no particles or impurities in the medium openings. Coolant or foreign substances in the oil can cause engine damage such as damage to the connecting rod bearing.
G14251702Courtesy of BMW OF NORTH AMERICA, INC.

Fastening cylinder head cover on the right 

Cylinder head cover: Cylinders 1 to 4 

Fig 2: Right Cylinder Head Cover Bolts Tightening Sequence
G15195876Courtesy of BMW OF NORTH AMERICA, INC.
NOTE: TECHNICAL INFORMATION 
The sealing surfaces must be free of oil, grease and cleaning agents.
TIGHTENING TORQUE SPECIFICATIONS

M8x40 screw
Replace screw. tightening torque  25 Nm
Angle of rotation  45°
G15066980Courtesy of BMW OF NORTH AMERICA, INC.

Slide the coolant hose on.

Tighten the hose clamp (1)  .

TIGHTENING TORQUE SPECIFICATIONS

Hose clamp
Tightening torque  1.5 Nm
G15066978Courtesy of BMW OF NORTH AMERICA, INC.
NOTE: To provide a better overview: Schematic diagram with partially hidden components.

Secure the wiring harness mountings (1)  below the intake system.

G14252008Courtesy of BMW OF NORTH AMERICA, INC.

Follow-up work