Check the timing of cylinder bank 1

WARNING: Working on 12 V electrical system.
Risk of short circuits! Risk of fire!

Make sure that there is no charger connected to the jump start terminal in the engine compartment.
Detach battery ground lead from battery.
For auxiliary batteries: Detach battery minus cables from all auxiliary batteries.

WARNING: Vehicle may slip off the vehicle hoist if the vehicle hoist is handled incorrectly.
Danger! Immobilization period-threatening injuries!

Observe safety instructions on raising the vehicle using a vehicle hoist.
For additional information see: 00... RAISING THE VEHICLE WITH A VEHICLE LIFT .

CAUTION: Refrigerant circuit under high pressure.
Injury hazard!

Note and follow safety instructions on containers.
Avoid contact with refrigerant; wear safety goggles and hand protection.
For additional information see: 64 50 SAFETY INSTRUCTIONS FOR HANDLING TETRAFLUORETHANE REFRIGERANT R134A and 64 50 NOTES FOR REPAIR WORK ON AIR CONDITIONING

NOTE: RISK OF DAMAGE
Damage to battery terminal, the safety battery terminal or the intelligent battery sensor (IBS).
Damaged battery terminals can lead to malfunctions or vehicle electrical system faults.

Detach battery terminal from battery pole. Do not pry off using a tool.

NOTE: RISK OF DAMAGE
Careless handling of tools and sharp-edged components.
Scratches, surface damage.

Protect working area.
Handle tools and components carefully.

Preliminary work

Refer to DISCONNECTING ALL BATTERY GROUND LEADS .
Refer to REMOVING THE WHEEL .
Refer to REMOVING THE FRONT SECTION OF THE FRONT WHEEL ARCH COVER .
Refer to REMOVING THE TOP LEFT COVER IN THE ENGINE COMPARTMENT and REMOVE THE TOP RIGHT COVER IN THE ENGINE COMPARTMENT .
Refer to REMOVING THE ACOUSTIC COVER .
Refer to REMOVING UPPER CROSS CONNECTION .
Refer to REMOVING THE FRONT-END STRUT .
Refer to REMOVING THE REAR TOP CROSS CONNECTION .
Refer to REMOVING THE INTAKE FILTER HOUSING ON THE LEFT .
Refer to PARTIAL UNINSTALLATION OF THE ENGINE VENTILATION LINE OF CYLINDER BANK 2 .
Refer to REMOVING ENGINE VENTILATION LINE OF CYLINDER BANK 2 .
Refer to PARTIALLY DETACHING ACTIVATED CARBON FILTER LINE .
Refer to REMOVING THE OXYGEN SENSOR MONITOR FOR THE CYLINDERS 5 TO 8 .
Refer to REMOVING THE LEFT INTAKE SILENCER BRACKET .
Refer to REMOVING THE LEFT UNFILTERED-AIR DUCT .
Refer to REMOVING RIGHT INTAKE SILENCER HOUSING .
Refer to PARTIAL UNINSTALLATION OF THE ENGINE VENTILATION LINE OF CYLINDER BANK 1 .
Refer to REMOVING ENGINE VENTILATION LINE OF CYLINDER BANK 1 .
Refer to REMOVING THE OXYGEN SENSOR MONITOR FOR THE CYLINDERS 1 TO 4 .
Refer to REMOVING THE RIGHT INTAKE SILENCER BRACKET .
Refer to REMOVING THE LOW-TEMPERATURE COOLANT EXPANSION TANK .
Refer to REMOVING THE CROSS OF THE TRANSMISSION WIRING HARNESS .
Refer to REMOVING LAMBDA OXYGEN SENSOR FOR THE CYLINDERS 1 TO 4 .
Refer to REMOVING LAMBDA OXYGEN SENSOR FOR THE CYLINDERS 5 TO 8 .
Refer to REMOVING UPPER HEAT SHIELD .
Refer to REMOVING UPPER CATALYTIC CONVERTER NEAR ENGINE FROM CYLINDER BANK 1 .
Refer to REMOVING THE CATALYTIC CONVERTER NEAR THE ENGINE AT TOP OF CYLINDER BANK 2 .
Refer to REMOVING OIL FILLER NECK .
Refer to REMOVING THE RIGHT UNFILTERED-AIR DUCT .
Refer to REMOVING THE FAN COWL .
Refer to REMOVING COVER FOR THE DME CONTROL UNIT ON LEFT .
Refer to REMOVING THE DME CONTROL UNIT FOR CYLINDERS 5 TO 8 .
Refer to REMOVING THE HOLDER FOR THE DME CONTROL UNIT ON THE LEFT .
Refer to REMOVING SAFETY PRESSURE SWITCH .
Refer to DISCONNECTING REFRIGERANT LINE ON THE CONNECTING PIECE .
Refer to REMOVING THE PRESSURE LINE BETWEEN THE EVAPORATOR AND THE AIR CONDITIONING CONDENSER .
Refer to REMOVING DRIVE BELT .
Refer to REMOVING THE FRONT UNDERBODY PROTECTION .
Refer to REMOVING THE WHEEL ARCH COVER AT THE BOTTOM FRONT LEFT AND BOTTOM RIGHT .
Refer to DRAINING THE COOLANT FOR THE LOW-TEMPERATURE COOLANT CIRCUIT .
Refer to DRAINING THE HIGH-TEMPERATURE COOLANT CIRCUIT .
Refer to REMOVING LEFT AND RIGHT CHARGE AIR COOLER .
Refer to REMOVING LEFT THROTTLE VALVE ASSEMBLY .
Refer to REMOVING IGNITION COIL OF CYLINDER BANK 1 .
Refer to REMOVING THE IGNITION COILS OF CYLINDERS 5 AND 6 .
Refer to REMOVING HIGH PRESSURE RAIL AT CYLINDER BANK 1 .
Refer to REMOVING THE COOLANT LINE BETWEEN THE COOLANT PUMP AND HEAT EXCHANGER PARTIALLY .
Refer to RELEASING THE COOLANT LINE FOR THE EXHAUST TURBOCHARGER .
Refer to PARTIALLY RELEASING FUEL FEED LINE .
Refer to REMOVING FUEL DELIVERY LINE .
Refer to REMOVING HEAT SHIELD OF THE CRANKCASE VENTILATION FOR CYLINDERS 1 TO 4 .
Refer to REMOVING RIGHT HIGH-PRESSURE PUMP .
Refer to PARTIALLY RELEASING THE WIRING HARNESS SECTION FOR THE INTEGRATED POWER SUPPLY MODULE .
Refer to REMOVING WIRING HARNESS SECTION FOR THE IGNITION SYSTEM OF CYLINDER BANK 1 .
Refer to REMOVING RIGHT CYLINDER HEAD COVER .
Refer to REMOVING THE ELECTRIC COOLANT PUMP WITH THE HOLDER (CYLINDER HEAD COVER MOUNTED) .
Refer to REMOVING THE SEALING CAP ON THE CYLINDER HEAD OF THE CYLINDER BANK 1

Loosen screws (1) .
Remove the sealing cap (2) on the cylinder head.

Courtesy of BMW OF NORTH AMERICA, INC.

Moving the crankshaft into the installation position of cylinder bank 1

Turn the engine at the central bolt in clockwise direction until the installation position (MP) (1) of the vibration absorber (1) is positioned flush with the marks of the engine block.

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Check the camshaft positions of cylinder bank 1.
The cams (1) should be in the position shown.

The increment wheels (2) should each form a straight line with the exhaust camshaft bearing cap and the intake camshaft bearing cap.

Courtesy of BMW OF NORTH AMERICA, INC.

NOTE: Description is for right component only. The procedure on the left side is identical.

NOTE: To provide a better overview: Schematic diagram with partially hidden components.

Courtesy of BMW OF NORTH AMERICA, INC.

Ensure that the polished surfaces of the camshafts (1) point upward.
Ensure that the rounded surfaces (1) are pointing down to the cylinder head.
Check timing again and assess.

Checking the VANOS adjuster of cylinder bank 1

Check

Check the lock of intake adjuster and exhaust camshaft adjuster.
Position the open-end wrench (1) on the hexagon of the camshafts.
Move the open-end wrench back and forth a little in the arrow direction.
The camshafts must be connected with the VANOS adjusters (2) with frictional connections.

Courtesy of BMW OF NORTH AMERICA, INC.

Result

» Camshafts are connected to the VANOS adjusters (2) with frictional connections.

Measure

Continue the repair with the next step.

Result

» If there is no frictional connection, the relevant adjuster must be replaced.

Measure

Replace the affected VANOS adjuster.

Measure

Check timing again.

Relieving the chain tensioner at cylinder bank 1 for checking or setting the valve timings

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.

Make sure that the chain drive is loaded at the same time on the central bolt of the engine and on the VANOS central valve on the exhaust.
The movement of the chain tensioner piston must be observed in this process.

To do this, the following steps must be carried out at the same time:
Keep the VANOS central valve on the exhaust under tension in clockwise direction with a support person.
The VANOS central valve on the exhaust must not be twisted.

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Turn engine counter clockwise at central bolt (1) .

Courtesy of BMW OF NORTH AMERICA, INC.

Slackening the hydraulic chain tensioner 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.

Courtesy of BMW OF NORTH AMERICA, INC.

Position the special tool 0 491 012 (11 4 120) (3) in the bore and fasten the chain tensioner piston.

Make sure that the chain drive is relieved at the same time on the central bolt of the engine and on the VANOS central valve on the exhaust. To do this, carry out the following steps at the same time:
Relieve the chain drive clockwise at the central bolt.

Courtesy of BMW OF NORTH AMERICA, INC.
Relieve the chain drive counterclockwise at the VANOS central valve on the exhaust.

Courtesy of BMW OF NORTH AMERICA, INC.

Removing hydraulic chain tensioner 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.

Courtesy of BMW OF NORTH AMERICA, INC.

Loosen screws (1) .
Feed out and remove hydraulic chain tensioner (2) .

Installing the special tool for pretensioning 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.

Position the special tool 2 249 162 on the cylinder head and apply the screws (1) hand-tight.
The pretension screw (2) must be tension-free.

Courtesy 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.

Hand-tighten the bolts (1) .
Pre-tension timing chain on special tool 2 249 162 at hexagon screw (2) with special tool 0 496 778 (00 9 460).

TIGHTENING TORQUE SPECIFICATIONS

Preload timing chain
	tightening torque	0.6 Nm

Courtesy of BMW OF NORTH AMERICA, INC.

Secure the engine in installation position at cylinder 1

Position special tool 0 496 366 (11 8 570) (3) on the vibration absorber.
Position special tool 0 493 882 (11 9 190) (1) in special tool 0 496 366 (11 8 570).
NOTE: Do not slide the special tool 0 493 882 (11 9 190) (1) too far in; otherwise, it will collide with other components when the crankshaft is turning.
Position reversible ratchet (1) .
Rotate engine on the central bolt until the special tool lines up with the engine block marks.
Attach the special tool 0 496 366 (11 8 570) (3) to the vibration absorber with a screw from the belt pulley (2) and hand-tighten.
With the crankshaft in the installation position, use the special tool 0 493 882 (11 9 190) (1) to insert it onto the marks and fasten.

Courtesy of BMW OF NORTH AMERICA, INC.

NOTE: Description is for right component only. The procedure on the left side is identical.

NOTE: To provide a better overview: Schematic diagram with partially hidden components.

Courtesy of BMW OF NORTH AMERICA, INC.

Ensure that the polished surfaces of the camshafts (1) point upward.
Ensure that the rounded surfaces (1) are pointing down to the cylinder head.
Check timing again and assess.

Check

Check the camshaft positions of cylinder bank 1.
The cams (1) should be in the position shown.

The increment wheels (2) must be flush with the exhaust camshaft bearing cap and the intake camshaft bearing cap.

The ground surfaces of the camshaft must face up.

Courtesy of BMW OF NORTH AMERICA, INC.

Result

» Camshaft position is correct.

Measure

Continue the repair with the next step.

Result

» Camshaft position is not correct.

Measure

Disassemble special tools 0 496 366 (11 8 570) and 0 493 882 (11 9 190) and remove.

Measure

Turn engine at the central bolt of the crankshaft by 360° until the installation position (MP) of the vibration absorber is positioned flush with the marks of the engine block.

Measure

Re-secure the engine in TDC setting with special tools 0 496 366 (11 8 570) and 0 493 882 (11 9 190).

Installing the special tool to secure the camshafts of cylinder bank 1

NOTE: TECHNICAL INFORMATION
If the check finds that the valve timings are incorrect, they must be adjusted.
For additional information, see: 11 31... ADJUSTING CAMSHAFT TIMING ON LEFT SIDE and ADJUSTING CAMSHAFT TIMING ON RIGHT SIDE

Check

Position special tool 2 249 117 (1) on the camshafts of cylinder bank 1.
Check if the camshafts can be fastened with the special tool 2 249 117 (1) .
Check if the special tool 2 249 117 can be brought in contact with the cylinder head using the two screws of the cylinder head cover (2) .

Courtesy of BMW OF NORTH AMERICA, INC.

Result

» The camshafts can be fastened.

Measure

Timings are OK.
Loosen screws (2) .

Remove the special tool 2 249 117 (1) .

Continue the repair in the next step.

Result

» The camshafts cannot be fastened.

Measure

Adjust the timings of cylinder bank 1.

Remove the special tools to disconnect the crankshaft

Remove special tool 0 493 882 (11 9 190) (1) .
Release the screw (2) of the belt pulley.
Remove special tool 0 496 366 (11 8 570) (3) .

Courtesy of BMW OF NORTH AMERICA, INC.

Removing the special tool to pretension the timing chain at 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.

Release timing chain on the special tool 2 249 162 by turning the hexagon screw (2).
Release the special tool 2 249 162 in the areas (1) and remove it.

Courtesy of BMW OF NORTH AMERICA, INC.

Installing the hydraulic chain tensioner 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.

Feed in and position the hydraulic chain tensioner (2) .
Tighten the screws (1) .

TIGHTENING TORQUE SPECIFICATIONS

Chain tensioner to cylinder head
screw	Tightening torque	13 Nm

Courtesy of BMW OF NORTH AMERICA, INC.

Remove the special tool 0 491 012 (11 4 120) or transportation retainer (3) from the bore.

Courtesy of BMW OF NORTH AMERICA, INC.

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

Replace the seal (1) .
Parts: Seal

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Position the sealing cap (2) on the cylinder head.
Tighten down screws (1) .

TIGHTENING TORQUE SPECIFICATIONS

Sealing cap to cylinder head
M6x20 screw	Tightening torque	9.5 Nm

Courtesy of BMW OF NORTH AMERICA, INC.

Follow-up work

Refer to INSTALLING THE ELECTRIC COOLANT PUMP WITH THE HOLDER (CYLINDER HEAD COVER MOUNTED) .
Refer to INSTALLING THE CYLINDER HEAD COVER ON THE RIGHT .
Refer to INSTALLING WIRING HARNESS SECTION FOR IGNITION SYSTEM OF BANK 1 .
Refer to SECURING THE WIRING HARNESS SECTION FOR THE INTEGRATED POWER SUPPLY MODULE .
Refer to INSTALLING RIGHT HIGH PRESSURE PUMP .
Refer to INSTALLING THE HEAT SHIELD OF THE CRANKCASE VENTILATION OF CYLINDERS 1 TO 4 .
Refer to INSTALLING FUEL DELIVERY LINE .
Refer to SECURING THE FUEL SUPPLY LINE ON THE LEFT .
Refer to SECURING COOLANT LINES FOR THE EXHAUST TURBOCHARGERS .
Refer to INSTALL RAIL OF CYLINDER BANK 1 .
Refer to INSTALLING RAIL ON BANK 2 .
Refer to INSTALLING THE IGNITION COILS OF CYLINDERS 5 AND 6 .
Refer to INSTALLING IGNITION COILS OF CYLINDER BANK 1 .
Refer to FASTENING THE COOLANT LINE BETWEEN THE COOLANT PUMP AND THE HEAT EXCHANGER .
Refer to INSTALLING THE LEFT THROTTLE BODY .
Refer to INSTALLING THE CHARGE AIR COOLER ON THE RIGHT and INSTALLING THE LEFT-HAND CHARGE AIR COOLER .
Refer to CLOSING THE HIGH-TEMPERATURE COOLANT CIRCUIT .
Refer to CLOSING THE LOW-TEMPERATURE COOLANT CIRCUIT .
Refer to INSTALLING FRONT UNDERBODY PROTECTION .
Refer to INSTALLING THE LOWER LEFT FRONT WHEEL ARCH COVER .
Refer to INSTALL DRIVE BELT .
Refer to INSTALLING COVER FOR THE LEFT DME CONTROL UNIT .
Refer to INSTALLING FAN COWL .
Refer to INSTALLING THE RIGHT UNFILTERED-AIR DUCT .
Refer to INSTALLING OIL FILLER NECK .
Refer to INSTALLING UPPER CATALYTIC CONVERTER NEAR ENGINE FOR BANK 2 .
Refer to INSTALLING CATALYTIC CONVERTER NEAR THE ENGINE ABOVE CYLINDER BANK 1 .
Refer to INSTALLING HEAT SHIELD, TOP .
Refer to INSTALLING THE LAMBDA OXYGEN SENSOR FOR THE CYLINDERS 1 TO 4 .
Refer to INSTALLING THE LAMBDA OXYGEN SENSOR FOR THE CYLINDERS 5 TO 8 .
Refer to INSTALLING THE CROSSING OF THE TRANSMISSION WIRING HARNESS .
Refer to INSTALLING THE COOLANT EXPANSION TANK FOR THE LOW-TEMPERATURE .
Refer to INSTALLING BRACKET FOR RIGHT INTAKE SILENCER .
Refer to INSTALLING THE OXYGEN SENSOR MONITOR FOR CYLINDERS 1 TO 4 .
Refer to INSTALLING RIGHT INTAKE SILENCER HOUSING .
Refer to INSTALLING THE LEFT UNFILTERED-AIR DUCT .
Refer to INSTALLING THE LEFT INTAKE SILENCER BRACKET .
Refer to INSTALLING THE OXYGEN SENSOR MONITOR FOR CYLINDERS 5 TO 8 .
Refer to FASTENING THE ACTIVATED-CHARCOAL FILTER LINE .
Refer to INSTALLING THE ENGINE VENTILATION LINE OF CYLINDER BANK 2 .
Refer to FASTENING THE ENGINE VENTILATION LINE OF CYLINDER BANK 2 .
Refer to INSTALLING LEFT INTAKE SILENCER HOUSING .
Refer to INSTALLING THE REAR TOP CROSS CONNECTION .
Refer to INSTALLING THE FRONT-END STRUT .
Refer to INSTALLING UPPER CROSS CONNECTION .
Refer to INSTALLING ACOUSTIC COVER .
Refer to INSTALLING THE COVER IN THE ENGINE COMPARTMENT AT TOP LEFT and INSTALL THE COVER IN THE ENGINE COMPARTMENT ON THE TOP RIGHT .
Refer to RECONNECTING ALL BATTERY GROUND LEADS .
Refer to FILLING THE HIGH-TEMPERATURE COOLING SYSTEM WITH THE VACUUM FILLING EQUIPMENT .
Refer to VENTING THE HIGH-TEMPERATURE COOLANT SYSTEM .
Refer to FILLING THE LOW-TEMPERATURE COOLING SYSTEM WITH THE VACUUM FILLING EQUIPMENT .
Refer to VENTING THE LOW-TEMPERATURE COOLING SYSTEM .