Thread on Subframe Mounting, Servicing

Thread on Subframe Mounting, Servicing

Observe safety precautions.

• Subframe is 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 Threaded plate (in retaining bracket for subframe)

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

• If damaged again, retaining bracket must be replaced => [ Subframe Bracket, Replacing ] Subframe Bracket.

2 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

- Drill out thread path using spiral bore.






• For drilling and grinding, use drill (VAS 6267).

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

• Do not cant drill.






Threads, Cutting

- Cut thread using tap.






- Clean thread socket (blow out using compressed air).

Thread Inserts, Inserting

- Screw thread insert - 3 - on to installing spindle until drive peg - 2 - on drive tab - 1 - of installing spindle.






• Thread insert must be able to be turned easily.

- Screw thread insert into threaded plate until thread insert connects flush with outside of thread plate (visual inspection).






- Then screw thread insert inward further about one 1/4 rotation.

- Remove installing spindle.

- Break off drive peg of thread insert using peg breaker.






- Install subframe (suspension subframe) (tightening specifications).