11 12 106 Removing and Installing Right Cylinder Head (N73)

Special tools required: 

• 00 9 120. See 00 9 120 TORQUE ANGLE MEASURING DIAL
• 11 7 270. See 11 7 270 PIN WRENCH

Cylinders 1 to 6.

Necessary preliminary tasks: 

• Drain coolant. See 17 00 005 DRAINING AND ADDING COOLANT (N73)
• Drain engine oil. See 00 00 610 ENGINE OIL SERVICE (N73)
• Remove right exhaust manifold. See 18 40 020 REMOVING AND INSTALLING/REPLACING RIGHT EXHAUST MANIFOLD (N73)
• Remove intake air manifold. See 11 61 050 Removing and Installing Intake Air Manifold (N73) 
• Remove right cylinder head cover. See 11 12 106 Removing and Installing Right Cylinder Head (N73) 
• Remove right timing case cover. See 11 14 085 Removing and Installing Top Right Timing Case Cover (N73) 
• Remove inlet and exhaust VANOS on right side. See 11 36 048 Removing and installing/replacing inlet and exhaust VANOS on right side (N73) 
• Detach coolant hoses from cylinder head.

Remove screw connection (1) from Valvetronic drive with special tool 11 7 270. See 11 7 270 PIN WRENCH

Remove worm drive (2) in direction of arrow.

Fig 1: Removing Screw Connection From Valvetronic Drive

Courtesy of BMW OF NORTH AMERICA, INC.

Adjust eccentric shaft to max. stroke and pretension tensioning spring (1) with a cable tie (2).

Feed tensioning spring (1) out from roller (3) and carefully relieve tension.

Fig 2: Identifying Pretension Tensioning Spring With Cable Tying

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Reset eccentric shaft to minimum stroke.

Fig 3: Identifying Turn Eccentric Shaft

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Release screw connection on tensioning spring (1) and remove towards top.

Fig 4: Locating Tensioning Spring

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Release screw connection on eccentric shaft sensor (1) and remove.

Installation: 

Tightening torque: 11 37 1AZ. See 11 37 VARIABLE VALVE GEAR

Fig 5: Identifying Eccentric Shaft Sensor Screw

Courtesy of BMW OF NORTH AMERICA, INC.

Detach guide rail from cylinder head.

Fig 6: Identifying Guide Rail From Cylinder Head

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Release screw for oil lines (1) and unclip from holders.

Release cylinder head bolts (2) on timing case cover.

Release cylinder head bolts (3) along line (4) from outside to inside.

Fig 7: Identifying Cylinder Head Bolts

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Coat gap (1) between engine block and timing case cover with

Drei Bond 1209 liquid sealant (sourcing reference: BMW Parts Service).

Check adapter sleeves (2) for damage and correct installation position, replace if necessary.

Fig 8: Identifying Adapter Sleeves Installation Position

Courtesy of BMW OF NORTH AMERICA, INC.

Installation: 

All bores and blind holes must be free of oil and coolant. If necessary, blow clean with compressed air.

Install cylinder head gasket. See 11 12 111 Replacing Right Cylinder Head Gasket (N73) 

Illustrations show cylinders 7 to 12.

Put the cylinder head on.

Install cylinder head bolts with washers and initially tighten without play.

Tighten down cylinder head bolts with special tool 00 9 120 in sequence 1 to 14. See 00 9 120 TORQUE ANGLE MEASURING DIAL

Fig 9: Right Cylinder Head Bolts Tightening/Loosening Sequence

Courtesy of BMW OF NORTH AMERICA, INC.

Installation: 

Tightening torque 11 12 8AZ. See 11 12 CYLINDER HEAD WITH COVER

Insert and tighten down screws between cylinder head and timing case cover.

Installation: 

Tightening torque 11 14 1AZ. See 11 14 CASE COVERS

Fig 10: Identifying Timing Case Cover Bolts

Courtesy of BMW OF NORTH AMERICA, INC.

Adjust valve timing. See 11 31 574 Adjusting Camshaft Timing On Right Side (N73) 

Assemble engine in reverse sequence to its disassembly.

Installation: 

Coat all bearings and cams of camshafts with engine oil.