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

WARNING: This page is about a different car, the 2005 BMW Z4, 2004 BMW Z4, and 2003 BMW Z4. However, it is still accessible from the selected car via links, so may be relevant.

(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.

Fig 1: Checking Valve Guide For Wear

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 . See 11 12 600 Reaming A Valve Guide (M52 / S52 / M52TU / M54 / M56) .

Fig 2: Identifying Valve With Larger Shaft Diameter

Courtesy of BMW OF NORTH AMERICA, INC.