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Home >> BMW >> 2021 >> 840i 2D Convertible >> Repair and Diagnosis >> Engine Mechanical >> Mechanical >> Cylinder Head -- Repair (G14, G15, & G16) (1 Of 7) >> 11 12 Cylinder Head >> 11 12 161 replace cylinder head (840i coupe, 840i Gran Coupe sedan) >> Clean sealing surfaces

Clean sealing surfaces

NOTE: RISK OF DAMAGE 
Damage to the surface. 
The use of metal-cutting tools (e.g., emery cloths) for cleaning surfaces can damage them and lead to leaks and/or engine damage. 
  • Do not use any metal-cutting tools.
G09873478Courtesy of BMW OF NORTH AMERICA, INC.
CAUTION: Swirling dirt particles caused by compressed air. 
Injury hazard! 
  • Collect dirt particles, e.g. when blowing out, use cloth to do so.
  • Wear safety goggles.
G14238465Courtesy of BMW OF NORTH AMERICA, INC.
G14238459Courtesy of BMW OF NORTH AMERICA, INC.