11 12 729 Checking cylinder head for water leaks (N62)

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Special tools required:

11 9 430
11 9 431
11 9 432
11 9 433

(cylinder head dismantled)

Have special tool kit 11 9 430 ready.

NOTE: Special tool kit 11 9 430 can be used for cylinder bank 1 to 4 and cylinder bank 5 to 8.

Place special tool 11 9 431 on cylinder head sealing surface, insert screws (special tool 11 9 433) and tighten down.

Fig 1: Placing Special Tool On Cylinder Head Sealing Surface

Courtesy of BMW OF NORTH AMERICA, INC.

Seal coolant opening with special tool 11 9 432 and tighten down.

Connect compressed air hose (1) to pressure gauge.

Fig 2: Connecting Compressed Air Hose To Pressure Gauge

Courtesy of BMW OF NORTH AMERICA, INC.

Immerse cylinder head in a water bath. Inspection pressure 4.5 bar.

Check cylinder head for escaping air (cracks).

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