11 12 729 Checking cylinder head for watertightness (M52TU / M54 / M56)

WARNING: This page is about a different car, the 2003 BMW X5, 2002 BMW X5, and 2001 BMW X5. However, it is still accessible from the selected car via links, so may be relevant.

NOTE:

For Special Tool identification, see SPECIAL TOOLS - X5 (3.0i) .

Special Tools Required:

11 7 390
11 7 391
11 7 392
11 7 393
11 7 394
11 7 395
11 7 396
11 7 397
11 7 398

(Cylinder head dismantled.)

Prepare special tool kit 11 7 390 .

NOTE: Special tool kit 11 7 390 consists of special tools 11 7 391 / 11 7 392 / 11 7 393 / 11 7 394 / 11 7 395 / 11 7 396 / 11 7 397 / 11 7 398 .

Place special tools 11 7 391 / 11 7 392 on cylinder head sealing surface and screw down with cylinder head bolts.

Fig 1: View Of Pressure Testing Fixture

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Turn back screw (1).

NOTE: Special tool 11 7 394 is secured with a pin (2).

Fit special tool 11 7 394 .

Fig 2: Identifying Support Bracket For Fixture

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Insert screw (1) by hand until special tool 11 7 393 rests on sealing surface.

Tighten down screw (1) by approx. a half to one turn.

Fig 3: Aligning Cover Plate On Sealing Surface

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Check sealing rings (1) and coat with water as anti-friction coating. Insert special tool 11 7 395 and tighten down.

Fig 4: Installing Screw Plug

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Seal coolant apertures with special tool kit 11 7 390 .

Fig 5: Locating Sealing Coolant Apertures

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Connect compressed air to special tool 11 7 395 .

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 6: Connecting Compressed Air To Fixture

Courtesy of BMW OF NORTH AMERICA, INC.