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Home >> BMW >> 2021 >> 330i >> Repair and Diagnosis >> Engine Mechanical >> Mechanical >> Engine - Cylinder Head/Valve Cover - Repair (G20) >> 11 12 Cylinder Head With Lid >> 11 12 000 Removing and installing/sealing cylinder head cover (330i and 330i xDrive) >> Removing the cylinder head cover

Removing the cylinder head cover

WARNING: Hot surfaces.
Risk of burning!
  • Perform all work only on components that have cooled down.
WARNING: Working on fuel system.
Risk of fire! Danger of explosion!
  • When working on the fuel system, make sure the workstation has sufficient ventilation, e.g., by means of extraction.
  • Tightly seal off open lines and connections; collect any leakage fuel directly at the point of exit.
  • No fire, sparks, open flames or smoking.
CAUTION: On releasing high pressure line, fuel may emerge at high speed.
Injury hazard!
  • Wear suitable personal protective equipment.
  • Before performing any installation work, allow cooling system to cool down to less than 40°C.
  • Note warnings on cylinder head cover.
NOTE: TECHNICAL INFORMATION 
Collect and dispose of emerging fluids. Observe country-specific waste disposal regulations.

Preliminary work 

Bolts of the cylinder head cover 

Fig 1: Cylinder Head Cover Bolts Loosening Sequence
G14191150Courtesy of BMW OF NORTH AMERICA, INC.

1 Bolts of the cylinder head cover 

- A Cylinder head cover 

15 

NOTE: RISK OF DAMAGE 
Damage to wires when disconnecting connectors and plug connections.
Sheared wires can cause a short circuit.
  • Do not pull on wires when disconnecting connectors and plug connections.