Reaming A Valve Guide

WARNING: This page is about a different car, the 2003 BMW 530i, 2002 BMW 530i, and 2001 BMW 530i. However, it is still accessible from the selected car via links, so may be relevant.

Valves removed, refer to 11 34 552 REMOVING AND INSTALLING OR REPLACING ALL VALVES (M52/S52/M52TU/M54/M56) .

NOTE: In event of excessive clearance between valve stem and valve guide:

Valve guide is reamed and a repair valve with a larger stem diameter is installed.

Assemble reaming tool and guide taper (1) from special tool kit 00 4 210 depending on stem diameter. Press guide taper (1) onto valve seat. Starting from combustion chamber side, ream valve guide dry. Rotate reaming tool once in downwards direction.

Fig 1: Assembling Reaming Tool And Guide Taper

Courtesy of BMW OF NORTH AMERICA, INC.

NOTE: Remachine valve seat after reaming, refer to REMACHINING A VALVE SEAT .