31 00... Notes on repairing threads: Procedure

2013 BMW 128i 2D Convertible, Eng CD N52, Standard TransSECTION Procedure
WARNING: This page does not describe the selected car, but rather 31 other vehicles, including the 2015 BMW Alpina B7L, 2015 BMW Alpina B7, 2015 BMW 750i, 2015 BMW 750Li, and 2015 BMW 740i. However, it is still accessible from the selected car via links, so may be relevant.
  1. Create a clean core hole; if necessary, drill out screw remnants
    Fig 1: Creating Clean Core Hole
    G06889537Courtesy of BMW OF NORTH AMERICA, INC.
  2. Create locating thread for Helicoil thread insert
    Fig 2: Inserting Helicoil Thread On Locating Thread
    G06889538Courtesy of BMW OF NORTH AMERICA, INC.
  3. Pick out Helicoil thread insert in accordance with the TABLEΒ  and screw into the locating thread until flush with the original thread
    Fig 3: Inserting Helicoil Thread On Original Thread
    G06889539Courtesy of BMW OF NORTH AMERICA, INC.
  4. Break drive pin and remove
    Fig 4: Removing Drive Pin
    G06889540Courtesy of BMW OF NORTH AMERICA, INC.
RENDER: 1.0x

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • β€’ You smell fuel, burning insulation, or see smoke.
  • β€’ Brakes feel soft, pull hard to one side, or make grinding noises.
  • β€’ The engine overheats, stalls repeatedly, or misfires under load.
  • β€’ You are missing required tools, torque specs, or safe lifting equipment.
  • β€’ You are not confident in the next step or safety outcome.