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Home >> BMW >> 2024 >> 330e xDrive >> Repair and Diagnosis >> External Pages >> Different car >> Section 190 (Engine - Cylinder Head/Valve Cover (2 Of 2) - Repair (G20)) >> 11 12 Cylinder Head With Lid >> 11 12 670 Clean intake ports (after vehicle diagnosis) (M340i) >> Turning the piston to the TDC

Turning the piston to the TDC

WARNING: This page does not describe the selected car, but rather 10 other vehicles, including the 2024 BMW M340i xDrive, 2024 BMW M340i, 2023 BMW M340i xDrive, 2023 BMW M340i, and 2022 BMW M340i xDrive. However, it is still accessible from the selected car via links, so may be relevant.
WARNING: Hot surfaces  .
Risk of burning! 
  • Perform all work only on components that have cooled down.
WARNING: Working on 12 V electrical system  .
Risk of short circuits! Risk of fire! 
  • Make sure that there is no charger  connected to the jump start terminal in the engine compartment.
  • Detach battery ground lead from battery.
  • For auxiliary batteries: Detach battery minus cables from all auxiliary batteries.
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: RISK OF DAMAGE 
Damage to battery terminal, the safety battery terminal or the intelligent battery sensor (IBS)  .
Damaged battery terminals can lead to malfunctions or vehicle electrical system faults  .
  • Detach battery terminal from battery pole by carefully shifting to and fro. Do not pry off using a tool.
NOTE: TECHNICAL INFORMATION 
Collect and dispose of emerging fluids. Observe country-specific waste disposal regulations.

Preliminary work 

NOTE: RISK OF DAMAGE 
Damage to the engine  .
If the engine is manually rotated in the wrong direction of rotation, the engine can be damaged  .
  • Only rotate the engine manually in the correct direction of rotation: a) clockwise when looking at the damper, or b) counterclockwise when looking at the chain drive, b) applies only if the timing chain is installed in the rear.
NOTE: TECHNICAL INFORMATION 
The OT finder from the special tool 2 302 630  absolutely must be vertical, otherwise the measurement result can be falsified.
NOTE: The description is provided only at one cylinder. The procedure is the same for all other cylinders.