Installing the cylinder head

• Check the fitting sleeves (1) for damage and a correct installation position, replace if necessary.

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  NOTE: TECHNICAL INFORMATION 
  Conduct the following operation with the assistance of a second person.
• Install the cylinder head (1) and the exhaust turbocharger with the workshop crane and the special tool 0 490 561 (11 0 000)  .

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• Replace screws (1) to (10).

  Parts:  Screws

• Make sure that all threaded holes in the engine block are free of coolant, motor oil or other contaminations.
• Position the screws in the sequence (1) to (10).
  Fig 1: Cylinder Head Bolts Tightening Sequence - X3 4-cyl. models except PHEV, 2018-2019

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• Tighten cylinder head bolts using special tools 0 490 504 (00 9 120)  and 0 495 747 (11 8 580)  in sequence (1) to (10).

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  TIGHTEN TORQUES SPECIFICATION
  
  

  Cylinder head to crankcase
  M11x1.5x188 11.9 Fit new cylinder head bolts.	1. Joining torque	30 Nm
  	2. Angle of rotation	90°
  	3. Angle of rotation	180°
  M11x1.5x188 13.9 Fit new cylinder head bolts.	1. Joining torque	30 Nm
  	2. Joining torque	50 Nm
  	3. Angle of rotation	180°
  	4. Angle of rotation	180°

• Install and tighten down screws (1).
  TIGHTEN TORQUES SPECIFICATION
  
  

  Cylinder head bolt to timing case cover
  M8x40	Tightening torque	20 Nm

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• Secure the intake camshaft with an open-end wrench (1).
• Position the camshaft sensor wheel (3) and tighten the bolt (2).
  TIGHTEN TORQUES SPECIFICATION
  
  

  Camshaft sensor wheel to intake camshaft
  M6	Tightening torque	10 Nm

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• Use the tool as shown for the next operation to tighten the screw connections of the grounding cable and the acoustic cover.

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• Position acoustic cover and tighten with screw (1).
  TIGHTEN TORQUES SPECIFICATION
  
  

  Acoustic cover, rear bottom on cylinder head
  M6 x 16	Tightening torque	8 Nm

• Lay wiring harness correctly and secure with the screw (3).

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  TIGHTEN TORQUES SPECIFICATION
  
  

  Cable bracket on rear cylinder head/transmission
  M6 x 20	Tightening torque	8 Nm

• Position the grounding cable and tighten it with the bolt (2).
  TIGHTEN TORQUES SPECIFICATION
  
  

  Grounding cable on cylinder head
  M6 x 16	Tightening torque	8 Nm

• Clip in the cable (1) in the highlighted area on the acoustic cover (2).

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• Mount the slide rail (2).
• Tighten down screws (1).
  TIGHTEN TORQUES SPECIFICATION
  
  

  Sliding rail to cylinder head
  M6x16	Tightening torque	8 Nm

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• Position the engine encapsulation (3) correctly.
• Connect connectors (1) and (2) and lock.

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  NOTE: TECHNICAL INFORMATION 
  Make sure that the connections are locked correctly. The locks must engage audibly.
• Lock the coolant line (1) in place and plug onto the cylinder head.

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Follow-up work 

• Block the CAMSHAFTS .
• Install the INTAKE ADJUSTER .
• Install intake side VANOS CENTRAL VALVE .
• Install exhaust camshaft ADJUSTER .
• Install exhaust side VANOS CENTRAL VALVE .
• Preload TIMING CHAIN .
• Tighten the VANOS CENTRAL VALVE .
• Disassemble all SPECIAL TOOLS .
• CRANK engine twice (automatic transmission).
• Install STARTER MOTOR .
• Install the INTAKE PLENUM .
• Install the tank VENT VALVE .
• Install control unit BRACKET .
• Install the integrated POWER SUPPLY MODULE (PDM).
• Install the DME CONTROL UNIT .
• Install cylinder head COVER .
• Install both ACTUATORS .
• PREPARE the injectors for installation.
• Install the RAIL .
• Install HIGH PRESSURE PUMP .
• Install FUEL DELIVERY LINE .
• Install the HIGH-PRESSURE LINE between the high-pressure pump and the high-pressure rail.
• Install all SPARK PLUGS .
• Install the IGNITION COILS .
• Install the cylinder head cover ACOUSTIC COVER .
• Install front engine ENCAPSULATION .
• Install the exhaust turbocharger AUXILIARY COOLANT PUMP .
• Install the exhaust turbocharger coolant RETURN LINE .
• Install exhaust turbocharger COOLANT FEED LINE .
• Install the exhaust turbocharger OIL FEED LINE .
• Attach the exhaust turbocharger OIL RETURN LINE .
• Install CATALYTIC CONVERTER
• Install EXHAUST SYSTEM
• Install the tunnel connect SUPPORTS
• Install left and right tank COVER
• Install the oxygen SENSOR MONITOR
• Install lambda OXYGEN SENSOR
• Install the engine front ACOUSTIC COVER
• Install charge AIR LINE
• Install clean AIR PIPE
• Install intake silencer HOUSING
• Install RESONATOR
• Fill the HIGH-TEMPERATURE COOLING SYSTEM with the vacuum fill equipment
• Fill the LOW-TEMPERATURE COOLING SYSTEM with the vacuum fill equipment
• Reconnect all battery GROUND LEADS
• Vent the LOW-TEMPERATURE COOLING SYSTEM
• Vent the HIGH-TEMPERATURE COOLANT SYSTEM
• Check engine OIL LEVEL 
• Install the underneath second end PANEL
• Install right sealing FRAME
• Install rear ACOUSTIC COVER
• Install the upper part COWL
• Install left and right shock tower TENSION STRUT
• Install windshield panel COVER
• Install left and right WIPER ARM
• Install the rear left engine compartment COVER
• Install the rear right engine compartment COVER
• Install the front hood rear SEAL
• Install ACOUSTIC COVER 
• Install the front bottom right wheel arch COVER
• Install the front UNDERBODY PROTECTION
• Install the center UNDERBODY PROTECTION
• Install rear UNDERBODY PROTECTION
• Take hood out of the SERVICE POSITION