11 12 729 Checking Cylinder Head For Leaks - Cylinder Head Removed (S54)

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Special Tools Required:

11 1 402
11 1 404
11 1 431
11 1 433

Seal off coolant openings with following special tools.

Special tool 11 1 431
Special tool 11 1 433
Special tool 11 1 402
Special tool 11 1 404

Fig 1: Sealing Off Coolant Openings With Special Tools
Courtesy of BMW OF NORTH AMERICA, INC.

Connect compressed air supply to special tool 11 1 404.

Immerse cylinder head in a water bath.

Test pressure: 4.5 bar.

Check cylinder head for escaping air (cracks).

NOTE: If necessary, soften the bath water with a cleaning agent.

Fig 2: Connecting Compressed Air Supply To Special Tool

Courtesy of BMW OF NORTH AMERICA, INC.