31 00 ... Notes on repairing threads

WARNING: This page does not describe the selected car, but rather 9 other vehicles, including the 2008 BMW 335i, 2008 BMW 328i, 2008 BMW 323i, 2007 BMW 335i, and 2007 BMW 328i. However, it is still accessible from the selected car via links, so may be relevant.

IMPORTANT: Install Helicoil thread inserts so that they are flush with the original thread.

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

Fig 1: Identifying Damaged Thread

Courtesy of BMW OF NORTH AMERICA, INC.

Procedure:

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

Fig 2: Drilling Out Screw Remnants
Courtesy of BMW OF NORTH AMERICA, INC.
Create locating thread for Helicoil thread insert

Fig 3: Creating Locating Thread For Helicoil Thread Insert
Courtesy of BMW OF NORTH AMERICA, INC.
Pick out Helicoil thread insert in accordance with the Table and screw into the locating thread until flush with the original thread

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

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