Procedures

Thread on Subframe Mounting


Observe safety precautions.

• Subframe (suspension subframe) was already removed.

• 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.

Special tools, testers and auxiliary items required

• Thread repair set M 12x1.5 (VAS 6058)

• Drill (VAS 6267)






1 Front longitudinal member

2 Threaded plate (welded into subframe retaining bracket)

• The threaded plate is not a replacement part and can be serviced only one time if damaged.

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

3 subframe retaining bracket (welded to the longitudinal member)

4 Helicoil thread insert

Contents of Thread Repair Set






1 Spiral drill 12.5 mm diameter

2 Tap M 12 x 1.5

3 Installing spindle

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

5 Peg breaker with magnetic tips

Thread, Servicing

Threads, Drilling


Wear protective eyewear when drilling out the threads.

- Drill out the threads with the spiral drill.






• Use 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


Wear protective eyewear when cutting the thread and when cleaning the threaded bushing with compressed air.

- 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.






• Thread insert must be able to be turned easily.

- 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 tighten the threaded insert by a 1/4 turn further.

- Remove the spindle.

- Break off thread insert driver tang using tang breaker.






- Install the subframe (suspension subframe).