11 12 729 Checking cylinder head for water leaks (N52K)

IMPORTANT: Pressure-test cylinder head to max. 3 bar.

Heat cylinder head to 60°.

Check for bubble formation in a water bath.

Necessary preliminary tasks:

NOTE: Observe mounting of special tool 11 4 341 on cylinder.

Secure special tool 11 4 341 with bolts 11 4 345 to 25 Nm.

Fig 1: Max Torque Value On Cylinder Block

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Install special tool 11 4 341 with special tool 11 4 345.

Installation:

Cylinder no. 1 is marked.

Fig 2: Special Tool (11 4 341) And Removal Direction

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Fit special tool 11 4 342 with bolts (1). Screw in knurled screw in direction of arrow.

Sealing flange must rest flat.

Fig 3: Special Tool (11 4 342) And Bolts

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Secure special tool 11 4 344 with bolts (1).

NOTE: Compressed air at valve max. 3 bar.

Heat cylinder head to 60°.

Check for bubble formation in a water bath.

Fig 4: Special Tool (11 4 344) And Bolts

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Assemble engine.