Removing and Installing Right Cylinder Head (N73)

11 12 106 - Removing and installing right cylinder head (N73)





Special tools required:
- 00 9 120 00 9 120 Torque Angle Measuring Dial
- 11 7 270 11 7 270 Pin Wrench





Cylinders 1 to 6.

Necessary preliminary tasks:
- Drain coolant Service and Repair.
- Drain engine oil Service and Repair.
- Remove right exhaust manifold Removing and Installing/Replacing Right Exhaust Manifold.
- Remove intake air manifold Service and Repair.
- Remove right cylinder head cover Removing and Installing/Sealing Right Cylinder Head Cover.
- Remove right timing case cover Removing and Installing Top Right Timing Case Cover (N73).
- Remove inlet and exhaust VANOS Removing and Installing/Replacing Inlet and Exhaust VANOS on Right Side (N73) on right side.
- 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 11 7 270 Pin Wrench.

Remove worm drive (2) in direction of arrow.





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.





Reset eccentric shaft to minimum stroke.





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





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

Installation:
Tightening torque: 11 37 1AZ 11 37 Variable Valve Gear.





Detach guide rail from cylinder head.





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.





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.

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

Install cylinder head gasket Replacing Right Cylinder Head Gasket.

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 00 9 120 Torque Angle Measuring Dial in sequence 1 to 14.

Installation:
Tightening torque 11 12 8AZ 7AZ - 8AZ.

Note:
Shown without camshafts for purposes of clarity.





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

Installation:
Tightening torque 11 14 1AZ 11 14 or 15 Case Covers.





Adjust valve timing 11 31 574 Adjusting Camshaft Timing on Right Side.

Assemble engine in reverse sequence to its disassembly.

Installation:
Coat all bearings and cams of camshafts with engine oil.