31 00... Notes on repairing threads

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

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Procedure:

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

Fig 2: Drilling Out Screw Remnants
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Create locating thread for Helicoil thread insert.

Fig 3: Inserting Screwdriver In Helicoil Thread
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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: Removing Helicoil Thread
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Break drive pin and remove.

Fig 5: Removing Break Drive Pin
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