Removal and Replacement

11 12 100 - Removing and installing/replacing cylinder head (M52TU/M54/M56)





Special tools required:
- 00 0 200 00 0 200 Cross Member
- 00 9 120 00 9 120 Torque Angle Measuring Dial





Remove both exhaust manifolds.

Note:
After removing exhaust manifolds:

Reinstall engine support arm with engine mount and remove special tool 00 0 200 00 0 200 Cross Member.





Remove intake filter housing with air-mass flow sensor.

Remove cylinder head cover Service and Repair.

Remove all spark plugs.

Remove intake air manifold Service and Repair.





Remove coolant drain plug in engine block. Drain and dispose of coolant.

Installation:
Replace sealing ring on drain plug.

Tightening torque, 11 11 5AZ 11 11 Engine Block.

Vent cooling system and check for leaks 17 00 039 Venting Cooling System and Checking For Leaks.

Remove coolant thermostat housing Service and Repair.





Remove coolant pipe.

Note:
If the coolant pipe cannot be fed out:

Release banjo bolt (1) and disconnect oil pressure line for VANOS adjustment unit.

Installation:
Replace O-ring on coolant pipe.

If necessary, replace sealing rings on banjo bolt (1).

Tightening torque of banjo bolt (1) 11 36 2AZ 11 36 Variable Camshaft Control VANOS.





Removal

Removal of cylinder head is described separately from installation.

Remove double VANOS adjustment unit Service and Repair.

Remove camshafts with bearing strips Service and Repair.





Release screw connection between timing case cover and cylinder head.





Release screws, remove chain guide.





Release cylinder head bolts from outside to inside in sequence 14 to 1.

Lift off cylinder head.





Installation

Installation of cylinder head is described separately from removal.

Clean sealing faces of cylinder head and engine block; if necessary, remove traces of gasket with hardwood spatula. Make sure no gasket remnants drop into oil and cooling channels.





Check adapter sleeves for damage and correct installation position.

Apply permanently elastic sealing compound Drei Bond 1209 (refer to BMW Parts Service) to joints to timing case cover.

Replace cylinder head gasket.





Note:
A cylinder head seal 0.3 mm thicker than usual can be obtained for machined (milled) cylinder heads.





Caution!
Different cylinder head bolts for M52TU engine:

M10x95 for engines with cast iron engine block.

M10x110 for engines with aluminum engine block.

Use cylinder head bolts only once.

There must be no oil in the tapped holes of the engine block and the timing case cover.

Risk of cracking and distorted tightening values.





Put the cylinder head on.

Apply a light coat of oil to washer contact area and thread of new cylinder head bolts.

Tighten down cylinder head bolts in sequence 1 to 14.

Tightening torque 11 12 6AZ 11 12 Cylinder Head with Cover.

Note:
Use special tool 00 9 120 00 9 120 Torque Angle Measuring Dial for torsion angle tightening.





Install chain guide.





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

Install camshafts Service and Repair.

Install double VANOS adjustment unit Service and Repair.

Assemble engine.