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

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NOTE:

For Special Tool identification, see ENGINE- SPECIAL TOOLS and MAINTENANCE AND GENERAL INFORMATION - SPECIAL TOOLS .

Special Tools Required:

00 9 120
11 7 270

Cylinders 1 to 6.

Necessary Preliminary Tasks:

Drain coolant. Refer to 17 00 005 DRAINING AND ADDING COOLANT (N73) .
Drain engine oil. Refer to 00 00 610 ENGINE OIL SERVICE (N73) .
Remove right exhaust manifold. Refer to 18 40 020 REMOVING AND INSTALLING/REPLACING RIGHT EXHAUST MANIFOLD (N73) .
Remove intake air manifold. Refer to 11 61 050 REMOVING AND INSTALLING INTAKE AIR MANIFOLD (N73) .
Remove right cylinder head cover. Refer to 11 12 006 REMOVING AND INSTALLING/SEALING RIGHT CYLINDER HEAD COVER (N73) .
Remove right timing case cover. Refer to 11 14 085 REMOVING AND INSTALLING TOP RIGHT TIMING CASE COVER (N73) .
Remove inlet and exhaust VANOS on right side. Refer to 11 36 048 REMOVING AND INSTALLING/REPLACING INLET AND EXHAUST VANOS ON RIGHT SIDE (N73) .
Detach coolant hoses from cylinder head.

IMPORTANT: Fit new cylinder head screws. Do not wash off bolt coating. There must be no oil in the blind holes (risk of cracking ).

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

Remove worm drive (2) in direction of arrow.

Fig 1: Identifying Screw Connection For 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: View Of Tensioning Spring (Right Cylinder Head Cover)

Courtesy of BMW OF NORTH AMERICA, INC.

Reset eccentric shaft to minimum stroke.

Fig 3: Locating Eccentric Shaft (Right Cylinder Head Cover)

Courtesy of BMW OF NORTH AMERICA, INC.

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

Fig 4: Identifying Screw Connection On Tensioning Spring (Right Cylinder Head Cover)

Courtesy of BMW OF NORTH AMERICA, INC.

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

Installation:

Tightening torque, refer to 11 37 1AZ in ENGINE - TIGHTENING TORQUES .

Fig 5: Locating Screw Connection On Eccentric Shaft Sensor (Right Cylinder Head Cover)

Courtesy of BMW OF NORTH AMERICA, INC.

Detach guide rail from cylinder head.

Fig 6: View Of Guide Rail On Cylinder Head (Right Cylinder Head Cover)

Courtesy of BMW OF NORTH AMERICA, INC.

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: Releasing Cylinder Head Bolts (Right Cylinder Head Cover)

Courtesy of BMW OF NORTH AMERICA, INC.

Coat gap (1) between engine block and timing case cover with Drei Bond 1209 liquid sealant.

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

Installation:

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

Install cylinder head gasket. Refer to 11 12 111 REPLACING RIGHT CYLINDER HEAD GASKET (N73) .

Illustrations show cylinders 7 to 12.

Fig 8: Locating Sealant Applying Area (Right Cylinder Head Cover)

Courtesy of BMW OF NORTH AMERICA, INC.

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.

Installation:

Tightening torque, refer to 11 12 8AZ in ENGINE - TIGHTENING TORQUES .

NOTE: Shown without camshafts for purposes of clarity.

Fig 9: Tightening Cylinder Head Bolts In Sequence (Right Cylinder Head Cover)

Courtesy of BMW OF NORTH AMERICA, INC.

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

Installation:

Tightening torque, refer to 11 14 1AZ in ENGINE - TIGHTENING TORQUES .

Fig 10: Inserting And Tightening Screws Between Cylinder Head And Timing Case Cover (Right Cylinder Head Cover)

Courtesy of BMW OF NORTH AMERICA, INC.

Adjust valve timing. Refer to 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.