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

WARNING: This page is about a different car, the 2003 BMW 525i, 2002 BMW 525i, and 2001 BMW 525i. 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: Attaching Dial Gauge & 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 Guide Surface For Reaming

Courtesy of BMW OF NORTH AMERICA, INC.