11 12 595 Checking a valve guide for wear (M52 / S52 / M52TU / M54 / M56)

(valve removed)

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: Max. permissible tilt clearance. See VALVES WITH SPRINGS .

Fig 1: Measuring Tilt Clearance

Courtesy of BMW OF NORTH AMERICA, INC.

NOTE: If tilt clearance is excessive, valve guide is reamed out and a repair valve with a larger shaft diameter is installed.

If necessary, ream valve guide.

Fig 2: Identifying Valve

Courtesy of BMW OF NORTH AMERICA, INC.