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.

Remove the coarse residue from the sealing surfaces of the cylinder head using the special tool 0 495 103 (11 4 471) .

Courtesy of BMW OF NORTH AMERICA, INC.
Remove the fine residue from the sealing surfaces of the cylinder head using the special tool 0 495 104 (11 4 472) .

Courtesy of BMW OF NORTH AMERICA, INC.
Clean all the blind holes (1) of the cylinder head.

Courtesy of BMW OF NORTH AMERICA, INC.
Remove the coarse residue from the sealing surfaces of the crankcase using the special tool 0 495 103 (11 4 471) .

Courtesy of BMW OF NORTH AMERICA, INC.
Remove the fine residue from the sealing surfaces of the crankcase using the special tool 0 495 104 (11 4 472) .
Clean all the blind holes of the crankcase.

Courtesy 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.
Courtesy of BMW OF NORTH AMERICA, INC.
Clean all the threaded holes of the crankcase in the marked areas with compressed air.
Remove special tool (B) from set of special tools 2 364 711 .

Courtesy of BMW OF NORTH AMERICA, INC.