Subframe Mounting Threads, Repairing

Subframe Mounting Threads, Repairing

Observe safety precautions.

• In the example, thread repair on this vehicle is described for left front retaining bracket for subframe and is to be employed at the other 3 retaining brackets accordingly as necessary.






1 Threaded plate (in retaining bracket for subframe)

2 Helicoil thread insert

• Threaded plate is not a replacement part and may only be repaired once if damaged.

• If damaged again, replace the retaining bracket. Refer to => [ Subframe Mounting Bracket ] Subframe Mounting Bracket.

Special tools, testers and auxiliary items required

• Thread repair kit M12x1.5 (VAS 6058)

• Drill (VAS 6267)

Contents of Thread Repair Set






1 Spiral drill 12.5 mm diameter

2 Tap M 12 x 1.5

3 Installing spindle

4 Threaded insert M 12 x 1.5 x 24 ( (VAS 6058/1) )

5 Peg breaker with magnetic tips

Threads, Repairing

Threads, Drilling

- Drill out the threads with the spiral drill.






• Use the drill (VAS 6267) for drilling and grinding.

• While drilling, drill must be held by a second person using an additional handle.






• Do not angle the drill.

Threads, Cutting

- Cut the threads with the thread tap.






- Clean threaded bushing (blow with pressurized air).

Thread Inserts, Inserting

- Turn the threaded insert - 3 - onto the spindle until the drive peg - 2 - makes contact on drive tab - 1 - of installing spindle.






- Screw the threaded insert into the threaded plate until the threaded insert is seated flush with the outer edge of the threaded plate (check visually).






- Then screw the threaded insert in by a 1/4 turn.

• Thread insert must be able to be turned easily.

- Remove the spindle.

- Break off thread insert driver tang using tang breaker.






- Install the subframe and observe the tightening specifications.