11 12 595 Checking A Valve Guide For Wear (N73)

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Necessary Preliminary Tasks:

Remove all valve springs. Refer to 11 34 715 REPLACING ALL VALVE SPRINGS (N73) .

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. See Fig 1.

NOTE: Max. permissible tilt clearance 0.5 mm .

Fig 1: Attaching Dial Gauge And Measuring Tilt Clearance

Courtesy of BMW OF NORTH AMERICA, INC.

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

Install engine in reverse sequence to its removal.