31 00... Notes on repairing threads

WARNING: This page is about a different car, the 2010 BMW 550i, 2009 BMW 550i, and 2008 BMW 550i. 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 Threads

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Procedure:

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

Fig 2: Creating Core Hole
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Create locating thread for Helicoil thread insert

Fig 3: Creating Thread For Helicoil Thread Insert
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Pick out Helicoil thread insert in accordance with the table and screw into the locating thread until flush with the original thread

Fig 4: Identifying Helicoil Thread Insert
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Break drive pin and remove

Fig 5: Breaking Drive Pin
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