11 12 595 Checking a valve guide for wear (N52)

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Necessary preliminary tasks:

Remove All Valve Springs.

To measure tilt clearance, install a new valve so that end of valve stem is flush with valve guide.

Attach dial gauge and measure tilt clearance.

NOTE: See illustration in Fig 1.

Max. permissible tilt clearance 0.5 mm.

Fig 1: Measuring Tilt Clearance Using Dial Gauge

Courtesy of BMW OF NORTH AMERICA, INC.

Is the valve guide is outside the tolerance, the cylinder head must be replaced.

Assemble engine.