Removing both timing chains and installing or replacing them

Precondition

Remove and install front axle complete with engine and transmission.
Remove and install the engine on the front axle

WARNING: Working on fuel system .
Risk of fire! Danger of explosion!

When working on the fuel system, make sure the workstation has sufficient ventilation, e.g., by means of extraction.
Tightly seal off open lines and connections; collect any leakage fuel directly at the point of exit.
No fire, sparks, open flames or smoking.

NOTE: TECHNICAL INFORMATION
Collect and dispose of emerging fluids. Observe country-specific waste disposal regulations.

Preliminary work

Refer to MOUNTING THE ENGINE TO THE ENGINE SUPPORT BRACKET .
Refer to RELEASING THE OIL DRAIN PLUG .
Refer to REMOVING DRIVE BELT .
Refer to REMOVING THE BELT TENSIONER .
Refer to REMOVING THE AIR CONDITIONING COMPRESSOR (ENGINE REMOVED) .
Refer to REMOVING THE BELT PULLEY ON THE TORSIONAL VIBRATION DAMPER .
Refer to REMOVING THE COOLANT PUMP .
Refer to RELEASING LEFT CHARGE AIR LINE PARTIALLY .
Refer to PARTIALLY RELEASING THE RIGHT CHARGE AIR LINE .
Refer to REMOVING THE COOLANT EXPANSION TANK FOR THE LOW-TEMPERATURE COOLANT CIRCUIT (CHARGE AIR COOLER) .
Refer to REMOVING BOTH CHARGE AIR COOLERS .
Refer to REMOVING THE CLEAN AIR PIPE OF CYLINDER BANK 1 .
Refer to REMOVING THE CLEAN AIR PIPE OF CYLINDER BANK 2 .
Refer to REMOVING THE IGNITION COILS OF CYLINDERS 1 AND 5 .
Refer to REMOVING FUEL DELIVERY LINE .
Refer to REMOVING IGNITION COIL OF CYLINDER BANK 2 .
Refer to REMOVING LEFT HIGH PRESSURE PUMP .
Refer to REMOVING THE HIGH-PRESSURE RAIL ON THE LEFT .
Refer to REMOVING THE INJECTORS FOR CYLINDERS 5 TO 8 .
Refer to REMOVING VANOS SOLENOID ACTUATOR, EXHAUST OF CYLINDER BANK 2 .
Refer to REMOVING VANOS SOLENOID ACTUATOR, INTAKE OF CYLINDER BANK 2 .
Refer to REMOVING THE LEFT AND RIGHT EXHAUST TURBOCHARGER .
Refer to REMOVING FRONT HEAT SHIELD .
Refer to REMOVING THE OIL FEED LINE AT THE EXHAUST TURBOCHARGER FOR CYLINDERS 5 TO 8 .
Refer to REMOVING LEFT CYLINDER HEAD COVER .
Refer to REMOVING THE TIMING CASE COVER FROM THE CYLINDER HEAD OF CYLINDER BANK 2 .
Refer to MOVING THE CRANKSHAFT TO THE INSTALLATION POSITION TO ADJUST THE TIMINGS .
Refer to CHECKING THE VANOS ADJUSTER OF CYLINDER BANK 2 .
Refer to RELAXING CHAIN TENSIONER ON BANK 2 FOR CHECKING OR SETTING TIMING .
Refer to REMOVING HYDRAULIC CHAIN TENSIONER OF CYLINDER BANK 2 .
Refer to PRELOADING THE TIMING CHAIN OF CYLINDER BANK 2 .
Refer to FIXING THE ENGINE IN THE INSTALLATION POSITION ON CYLINDER 1 (SET VALVE TIMINGS) .
Refer to REMOVING BOTH LEFT VANOS ADJUSTERS .
Refer to REMOVING SPECIAL TOOL FOR FIXING CAMSHAFTS IN POSITION ON BANK 2 .
Refer to REMOVING SPECIAL TOOL TO PRETENSION TIMING CHAIN ON CYLINDER BANK 2 .
Refer to REMOVING LEFT CYLINDER HEAD .
Refer to REMOVING IGNITION COIL OF CYLINDER BANK 1 .
Refer to REMOVING RIGHT HIGH-PRESSURE PUMP .
Refer to REMOVING RIGHT RAIL .
Refer to REMOVING THE INJECTORS FOR CYLINDERS 1 TO 4 .
Refer to PARTIALLY RELEASING THE GUIDE TUBE FOR THE OIL DIPSTICK .
Refer to REMOVING VANOS SOLENOID ACTUATOR, EXHAUST OF CYLINDER BANK 1 .
Refer to REMOVING THE VANOS SOLENOID ACTUATOR INTAKE OF CYLINDER BANK 1 .
Refer to REMOVING RIGHT CYLINDER HEAD COVER .
Refer to REMOVING THE SEALING CAP ON THE CYLINDER HEAD OF THE CYLINDER BANK 1 .
Refer to CHECKING THE VANOS ADJUSTER OF CYLINDER BANK 1 .
Refer to RELIEVING THE CHAIN TENSIONER AT CYLINDER BANK 1 FOR CHECKING OR SETTING THE VALVE TIMINGS .
Refer to REMOVING HYDRAULIC CHAIN TENSIONER OF CYLINDER BANK 1 .
Refer to PRELOADING THE TIMING CHAIN OF CYLINDER BANK 1 .
Refer to FIXING THE ENGINE IN THE INSTALLATION POSITION ON CYLINDER 1 (SET VALVE TIMINGS) .
Refer to REMOVING BOTH RIGHT VANOS ADJUSTERS .
Refer to REMOVING SPECIAL TOOL FOR FIXING CAMSHAFTS ON BANK 1 .
Refer to REMOVING THE SPECIAL TOOL TO PRETENSION THE TIMING CHAIN AT CYLINDER BANK 1 .
Refer to REMOVING RIGHT CYLINDER HEAD .
Refer to REMOVING THE VIBRATION DAMPER .
Refer to REMOVING LOWER OIL PAN SECTION .
Refer to REMOVING OIL PUMP .
Refer to REMOVING FRONT AXLE DIFFERENTIAL .
Refer to REMOVING UPPER OIL SUMP SECTION, ENGINE REMOVED .
Refer to REMOVING TIMING CASE COVER, BOTTOM .

Remove the slide rail (1) .

Courtesy of BMW OF NORTH AMERICA, INC.

Remove the tensioning rail of the timing chain for cylinder 1-4

Remove the tensioning rail (1) with the timing chain (2) from the crankshaft gearing.

Courtesy of BMW OF NORTH AMERICA, INC.

Removing the slide rail of the timing chain for cylinders 5 to 8

Remove the slide rail (1) .

Courtesy of BMW OF NORTH AMERICA, INC.

Remove the tensioning rail of the timing chain for cylinder 5-8

Remove the tensioning rail (1) with the timing chain (2) from the crankshaft gearing.

Courtesy of BMW OF NORTH AMERICA, INC.

Remove the gear from the crankshaft

Replace the bearing screws (1) .

Parts: Bearing screws

TIGHTENING TORQUE SPECIFICATIONS

Bearing screw to engine block
Bearing screw M10x1.25 Replace the bearing screw. Clean the thread in the engine block with a screw tap.	Tightening torque	46 Nm

Courtesy of BMW OF NORTH AMERICA, INC.

Clean the thread in the engine block with a screw tap .

Replace the bearing screws (2) .

Parts: Bearing screws

TIGHTENING TORQUE SPECIFICATIONS

Bearing screw to engine block
Bearing screw M8x1.25 Replace the bearing screw. Clean the thread in the engine block with a screw tap.	Tightening torque	20 Nm

Clean the thread in the engine block with a screw tap .
Replace the sprocket wheel (3) .
Parts: Camshaft sprocket
Detach the gear (1) using the special tools 0 490 798 (11 2 000) and 0 490 798 (11 2 000) .
Make sure that there are no metal chips or similar contaminants in the area of the chain drive, cleaning if necessary .

Courtesy of BMW OF NORTH AMERICA, INC.

Replace timing chains.
Parts: Timing chains

Install the gear on the crankshaft

NOTE: TECHNICAL INFORMATION
Wear protective gloves.

Check Woodruff key (1) for damage, replace if necessary.
Heat camshaft sprocket to a minimum of 60°C and a maximum of 150°C and mount on the crankshaft.

Courtesy of BMW OF NORTH AMERICA, INC.

Install the tensioning rail of the timing chain for cylinder 5-8

Position the tensioning rail (1) with the timing chain (2) on the gearing of the crankshaft.

Courtesy of BMW OF NORTH AMERICA, INC.

Install the guide rail of the timing chain for cylinders 5 to 8

Attach and position the slide rail (1) .

Courtesy of BMW OF NORTH AMERICA, INC.

Install the tensioning rail of the timing chain for cylinder 1-4

Position the tensioning rail (1) with timing chain on the gearing of the crankshaft.

Courtesy of BMW OF NORTH AMERICA, INC.

Attach and position the slide rail (1) .

Courtesy of BMW OF NORTH AMERICA, INC.

Follow-up work

Refer to INSTALLING TIMING CASE COVER, BOTTOM .
Refer to INSTALLING UPPER OIL SUMP SECTION (ENGINE REMOVED) .
Refer to INSTALLING THE OIL FILTER ELEMENT .
Refer to INSTALLING FRONT AXLE DIFFERENTIAL .
Refer to INSTALLING OIL PUMP .
Refer to INSTALLING THE LOWER OIL PAN SECTION .
Refer to INSTALLING THE VIBRATION DAMPER .
Refer to INSTALLING THE RIGHT CYLINDER HEAD .
Refer to INSTALLING BOTH RIGHT VANOS ADJUSTERS .
Refer to REMOVING THE SPECIAL TOOL TO PRETENSION THE TIMING CHAIN AT CYLINDER BANK 1 .
Refer to INSTALLING THE HYDRAULIC CHAIN TENSIONER OF CYLINDER BANK 1 .
Refer to INSTALLING THE SEALING CAP ON THE CYLINDER HEAD OF CYLINDER BANK 1 .
Refer to INSTALLING THE CYLINDER HEAD COVER ON THE RIGHT .
Refer to INSTALLING VANOS SOLENOID ACTUATOR, EXHAUST OF CYLINDER BANK 1 .
Refer to INSTALLING THE VANOS SOLENOID ACTUATOR INTAKE OF CYLINDER BANK 1 .
Refer to INSTALLING RIGHT HIGH PRESSURE PUMP .
Refer to INSTALLING THE INJECTORS FOR THE CYLINDERS 1 TO 4 .
Refer to INSTALLING THE RIGHT HIGH-PRESSURE RAIL .
Refer to INSTALLING IGNITION COILS OF CYLINDER BANK 1 .
Refer to PARTIALLY INSTALLING THE GUIDE TUBE FOR THE OIL DIPSTICK .
Refer to INSTALLING THE LEFT CYLINDER HEAD .
Refer to INSTALLING BOTH LEFT VANOS ADJUSTERS .
Refer to REMOVING SPECIAL TOOL TO PRETENSION TIMING CHAIN ON CYLINDER BANK 2 .
Refer to INSTALLING THE HYDRAULIC CHAIN TENSIONER OF CYLINDER BANK 2 .
Refer to INSTALLING THE TIMING CASE COVER ON THE CYLINDER HEAD OF CYLINDER BANK 2 .
Refer to INSTALLING THE LEFT CYLINDER HEAD COVER .
Refer to INSTALLING OIL FEED LINE ON EXHAUST TURBOCHARGER CYLINDERS 5 TO 8 .
Refer to INSTALLING VANOS SOLENOID ACTUATOR, INTAKE OF CYLINDER BANK 2 .
Refer to INSTALLING THE VANOS SOLENOID ACTUATOR EXHAUST OF CYLINDER BANK 2 .
Refer to INSTALLING THE LEFT HIGH PRESSURE PUMP .
Refer to INSTALLING FUEL DELIVERY LINE .
Refer to INSTALLING THE IGNITION COILS OF CYLINDER BANK 2 .
Refer to INSTALLING BOTH EXHAUST TURBOCHARGERS .
Refer to INSTALLING FUEL DELIVERY LINE .
Refer to INSTALLING THE IGNITION COILS OF CYLINDERS 1 AND 5 .
Refer to INSTALLING THE CLEAN AIR PIPE OF CYLINDER BANK 2 .
Refer to INSTALLING CLEAN AIR PIPE OF CYLINDER BANK 1 .
Refer to INSTALLING BOTH CHARGE AIR COOLERS .
Refer to INSTALLING THE COOLANT EXPANSION TANK FOR THE LOW-TEMPERATURE COOLANT CIRCUIT (CHARGE AIR COOLER) .
Refer to CONNECTING THE LEFT CHARGE AIR LINE TO THE EXHAUST TURBOCHARGER .
Refer to CONNECTING THE RIGHT CHARGE AIR LINE TO THE EXHAUST TURBOCHARGER .
Refer to INSTALLING COOLANT PUMPS .
Refer to INSTALLING AIR CONDITIONING COMPRESSOR (ENGINE REMOVED) .
Refer to INSTALLING THE BELT PULLEY ON THE TORSIONAL VIBRATION DAMPER .
Refer to INSTALLING THE BELT TENSIONER .
Refer to INSTALLING DRIVE BELT .
Refer to REMOVING THE ENGINE FROM THE ENGINE SUPPORT BRACKET .