11 12 729 Checking cylinder head for water leaks (N52T)

Special tools required:

IMPORTANT: Pressure-test cylinder head to max. 3 bar.
Heat cylinder head to 60 °.
Check for bubble formation in a water bath.

Necessary preliminary work:

NOTE: Check special tool 11 4 341 is correctly attached to cylinder.

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

Fig 1: Checking Cylinder Head For Water Leaks

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

Installation:

Cylinder no. 1 is marked.

Fig 2: Identifying Special Tool (11 4 341)

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

Sealing flange must rest flat.

Fig 3: Identifying Special Tool (11 4 342) & Screws

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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: Identifying Special Tool (11 4 344) With Screws

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Assemble engine.