11 12 729 Checking cylinder head for leaks (N62)

WARNING: This page is about a different car, the 2006 BMW X5, 2005 BMW X5, and 2004 BMW X5. However, it is still accessible from the selected car via links, so may be relevant.

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.

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

Fig 1: Placing Special Tool 11 9 431 On Cylinder Head Sealing Surface

Courtesy of BMW OF NORTH AMERICA, INC.

Connect compressed air hose (1) to pressure gauge.

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.

Fig 2: Connecting Compressed Air Hose To Pressure Gauge

Courtesy of BMW OF NORTH AMERICA, INC.