31 00 ... Notes On Repairing Threads

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

IMPORTANT: Install Heli-coil thread inserts so that they are flush with the original thread.

NOTE: Damaged threads in engine carrier may be repaired with Heli-coil thread inserts. Comply with the procedure described in the example.

Fig 1: Identifying Damaged Threads

Courtesy of BMW OF NORTH AMERICA, INC.

Procedure:

Create a clean core hole; if necessary, drill out screw remnants

Fig 2: Creating Clean Core Hole
Courtesy of BMW OF NORTH AMERICA, INC.
Create locating thread for Heli-coil thread insert

Fig 3: Creating Locating Thread For Heli-coil Thread
Courtesy of BMW OF NORTH AMERICA, INC.
Pick out proper Heli-coil thread insert and screw into the locating thread until flush with the original thread

Fig 4: Screwing Heli-coil Thread Insert Into Locating Thread
Courtesy of BMW OF NORTH AMERICA, INC.
Break drive pin and remove

Fig 5: Removing Drive Pin
Courtesy of BMW OF NORTH AMERICA, INC.