11 12 729 Checking Cylinder Head For Water Leaks (N62/N62TU)

WARNING: This page is about a different variant/trim than selected.

Special tools required:

(cylinder head dismantled)

Prepare special tool kit 11 9 430.

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 aperture with special tool 11 9 432 and tighten down.

Fig 1: Identifying Special Tool (11 9 433), (11 9 431) And (11 9 432)

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, add cleaning agent to water bath.

Fig 2: Identifying Cylinder Head For Escaping Air (Cracks)

Courtesy of BMW OF NORTH AMERICA, INC.