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

WARNING: This page is about a different car, the 2008 BMW 760Li and 2007 BMW 760Li. However, it is still accessible from the selected car via links, so may be relevant.

Necessary preliminary tasks:

Remove all valve springs. See 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 illustration.

NOTE: Max. permissible tilt clearance 0.5 mm.

Fig 1: Checking Valve Guide For Wear

Courtesy of BMW OF NORTH AMERICA, INC.

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

Install engine in reverse sequence to its removal.