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Home >> BMW >> 2021 >> 740i xDrive >> Repair and Diagnosis >> Engine Mechanical >> Mechanical >> Engine - Cylinder Head/Valve Cover (6 Of 6) - Repair (G12) >> 11 12 Cylinder Head >> 11 12 517 Removing and installing both cylinder heads (engine removed) (M760i xDrive 2017-2022) >> Installing both cylinder heads

Installing both cylinder heads

Installing the right cylinder head 

Screw connection of the cylinder head 

Fig 1: Right Cylinder Head Screws Tightening Sequence
G15129064Courtesy of BMW OF NORTH AMERICA, INC.
NOTE: TECHNICAL INFORMATION 
Handle the timing chain carefully  to protect the timing chain and timing chain drive from damage.
TIGHTENING TORQUE SPECIFICATIONS

Guide rail to cylinder head 1 to 6 
M8x38 Tightening torque  22 Nm
G08469116Courtesy of BMW OF NORTH AMERICA, INC.

Installing the coolant thermostat 

G15128760Courtesy of BMW OF NORTH AMERICA, INC.
G15128758Courtesy of BMW OF NORTH AMERICA, INC.

Installing the left cylinder head 

Screw connection of the cylinder head 

Fig 3: Left Cylinder Head Screws Tightening Sequence
G15129088Courtesy of BMW OF NORTH AMERICA, INC.
NOTE: TECHNICAL INFORMATION 
Handle the timing chain carefully  to protect the timing chain and timing chain drive from damage.
G15128710Courtesy of BMW OF NORTH AMERICA, INC.

Installing intake adjuster of cylinders 1 to 6 

The intake cam phaser is marked with "EIN"  .

The intake cam phaser (1) can be positioned freely on the camshaft.

G15139050Courtesy of BMW OF NORTH AMERICA, INC.

Installing exhaust camshaft adjuster of cylinders 1 to 6 

The exhaust cam phaser is marked with "Off"  .

The exhaust cam phaser (1) can be positioned freely on the camshaft.

G15139049Courtesy of BMW OF NORTH AMERICA, INC.

Replace the central bolt 

Parts:  screws.

CONSUMABLE DESCRIPTION

Copper paste  100 g, Tube 81229400794
G15139041Courtesy of BMW OF NORTH AMERICA, INC.

Secure both central bolts of the VANOS gear 

NOTE: The figure shows cylinders 1 to 6.
G15139035Courtesy of BMW OF NORTH AMERICA, INC.

Install the upper slide rail 

NOTE: The figure shows cylinders 1 to 6.
TIGHTENING TORQUE SPECIFICATIONS

Sliding rail to cylinder head 
M7X45 Tightening torque  15 Nm
G15139043Courtesy of BMW OF NORTH AMERICA, INC.

Installing the exhaust camshaft adjuster of cylinders 7 to 12 

The exhaust cam phaser is marked "Ex"  .

The exhaust cam phaser (1) can be positioned on the camshaft at random.

G15139038Courtesy of BMW OF NORTH AMERICA, INC.

Installing intake adjuster of cylinders 7 to 12 

The intake cam phaser is marked with "EIN"  .

The intake cam phaser (1) can be positioned freely on the camshaft.

G15139037Courtesy of BMW OF NORTH AMERICA, INC.

Replace the central bolt 

Parts:  screws.

CONSUMABLE DESCRIPTION

Copper paste  100 g, Tube 81229400794
G15139041Courtesy of BMW OF NORTH AMERICA, INC.

Secure both central bolts of the VANOS gear 

NOTE: The figure shows cylinders 1 to 6.
G15139035Courtesy of BMW OF NORTH AMERICA, INC.

Install the upper slide rail 

NOTE: The figure shows cylinders 1 to 6.
TIGHTENING TORQUE SPECIFICATIONS

Sliding rail to cylinder head 
M7X45 Tightening torque  15 Nm
G15139043Courtesy of BMW OF NORTH AMERICA, INC.

Installing special tool for fastening camshafts 

NOTE: RISK OF DAMAGE 
Damage of the engine and installed parts. 
Non-compliance with the instructions for mounting and disassembly may lead to damage to the engine and installed parts. 
  • Comply with the regulations for the installation and disassembly.
  • Perform work with vehicle care.

The value measured for the air gap on the intake camshaft and the exhaust camshaft must not be more than 0.4 mm.

G15130935Courtesy of BMW OF NORTH AMERICA, INC.

Screw in special tools 11 9 895 1 to 6 and 7 to 12 

G15130949Courtesy of BMW OF NORTH AMERICA, INC.

Fastening the camshafts with the special tool 

The gauges 0 496 381 (11 9 893)  must rest flush on the cylinder head.

G15130950Courtesy of BMW OF NORTH AMERICA, INC.

Installing special tool to pre-tension timing chain 

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.
G15139044Courtesy of BMW OF NORTH AMERICA, INC.

Securing the central bolt of the variable camshaft timing control of the intake 

TIGHTENING TORQUE SPECIFICATIONS

Variable camshaft timing control central bolt to camshaft 
M10x1
Replace screws and grease contact surface with copper paste.
Joining torque  30 Nm
Angle of rotation  90°
G15139045Courtesy of BMW OF NORTH AMERICA, INC.

Securing the central bolt of the variable camshaft timing control of the exhaust 

Securing the central bolt of the variable camshaft timing control of the exhaust 

TIGHTENING TORQUE SPECIFICATIONS

Variable camshaft timing control central bolt to camshaft 
M10x1
Replace screws and grease contact surface with copper paste.
Joining torque  30 Nm
Angle of rotation  90°
G15139046Courtesy of BMW OF NORTH AMERICA, INC.

Remove the special tools to fix the camshafts 

G15130935Courtesy of BMW OF NORTH AMERICA, INC.

Removing special tool to pretension timing chain 

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.
G15139036Courtesy of BMW OF NORTH AMERICA, INC.

Install the hydraulic chain tensioner 

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.
G08469106Courtesy of BMW OF NORTH AMERICA, INC.

Installing special tool for fastening camshafts 

NOTE: RISK OF DAMAGE 
Damage of the engine and installed parts. 
Non-compliance with the instructions for mounting and disassembly may lead to damage to the engine and installed parts. 
  • Comply with the regulations for the installation and disassembly.
  • Perform work with vehicle care.

The value measured for the air gap on the intake camshaft and the exhaust camshaft must not be more than 0.4 mm.

G15130935Courtesy of BMW OF NORTH AMERICA, INC.

Screw in special tools 11 9 895 1 to 6 and 7 to 12 

G15130949Courtesy of BMW OF NORTH AMERICA, INC.

Fastening the camshafts with the special tool 

The gauges 0 496 381 (11 9 893)  must rest flush on the cylinder head.

G15130950Courtesy of BMW OF NORTH AMERICA, INC.

Securing the central bolt of the variable camshaft timing control intake (cylinders 1 to 6) 

G15139057Courtesy of BMW OF NORTH AMERICA, INC.
TIGHTENING TORQUE SPECIFICATIONS

Variable camshaft timing control central bolt to camshaft 
M10x1
Replace screws and grease contact surface with copper paste.
Joining torque  30 Nm
Angle of rotation  90°

Secure the central screw of the variable exhaust camshaft timing control (cylinders 1 to 6) 

TIGHTENING TORQUE SPECIFICATIONS

Variable camshaft timing control central bolt to camshaft 
M10x1
Replace screws and grease contact surface with copper paste.
Joining torque  30 Nm
Angle of rotation  90°
G15139058Courtesy of BMW OF NORTH AMERICA, INC.

Remove the special tools to fix the camshafts 

G15130935Courtesy of BMW OF NORTH AMERICA, INC.

Removing special tool to pretension timing chain 

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.
G15139036Courtesy of BMW OF NORTH AMERICA, INC.

Install the hydraulic chain tensioner 

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.
G08469106Courtesy of BMW OF NORTH AMERICA, INC.

Follow-up work