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Home >> BMW >> 2021 >> 840i 2D Convertible >> Repair and Diagnosis >> External Pages >> Different car >> Section 206 (Crankshaft Seal & Timing Case Cover -- Repair (G02)) >> 11 14 Crankshaft Seal, Timing Case Cover >> 11 14 005 Replacing front crankshaft seal (X4 xDrive30i 2022-) >> Replacing front crankshaft seal

Replacing front crankshaft seal

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WARNING: Working on 12V 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.
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.

Preliminary work 

Removing the front crankshaft seal 

G11644921Courtesy of BMW OF NORTH AMERICA, INC.

Installing the front crankshaft seal 

G12700838Courtesy of BMW OF NORTH AMERICA, INC.
NOTE: RISK OF DAMAGE 
Radial shaft seal damage. 
Taping the sealing lip (inner) and applying oil to the radial shaft seal will lead to its destruction. 
  • Do not tap the sealing lip (inner) of the radial shaft seal.
  • Do not apply oil to the radial shaft seal.
  • Install the radial shaft seal dry.
G12700839Courtesy of BMW OF NORTH AMERICA, INC.
G14191509Courtesy of BMW OF NORTH AMERICA, INC.
G14191512Courtesy of BMW OF NORTH AMERICA, INC.

Follow-up work