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31 00... Notes on repairing threads

WARNING: This page is about a different variant/trim than selected.
IMPORTANT: Install Helicoil thread inserts so that they are flush with the original thread.
NOTE: Damaged threads in engine support may be repaired with Helicoil thread inserts. Comply with the procedure described in the example.
Fig 1: Identifying Helicoil Thread Inserts
G09848898Courtesy of BMW OF NORTH AMERICA, INC.

Procedure 

  1. Create a clean core hole; if necessary, drill out screw remnants
    Fig 2: Drilling Core Hole
    G09848899Courtesy of BMW OF NORTH AMERICA, INC.
  2. Create locating thread for Helicoil thread insert
    Fig 3: Creating Locating Thread For Helicoil Thread Insert
    G09848900Courtesy of BMW OF NORTH AMERICA, INC.
  3. Pick out Helicoil thread insert in accordance with the TABLE and screw into the locating thread until flush with the original thread
    Fig 4: Picking Out Helicoil Thread Insert
    G09848901Courtesy of BMW OF NORTH AMERICA, INC.
  4. Break drive pin and remove
    Fig 5: Removing Drive Pin
    G09848902Courtesy of BMW OF NORTH AMERICA, INC.