Repairing Subframe Mounting Threads

Repairing Subframe Mounting Threads

CAUTION!
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.

Special tools, testers and auxiliary items required

• Thread repair kit (VAS 6058)

• Drill machine (VAS 6267)





1 Threaded plate (welded into subframe retaining bracket)

• The threaded plate is not a replacement part and may only be repaired once if damaged!

• If damaged once again, the retaining bracket must be replaced. Replace retaining bracket. Refer to => [ Subframe Retaining Bracket ] .

2 Helicoil thread insert

Contents of Thread Repair Set





1 Spiral drill dia. 12.5 mm

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

Threads, Drilling

- Drill out the threads with the spiral drill.





- Do not angle the drill.

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





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

Threads, Cutting

- Cut the threads with the thread tap.





- Clean threaded bushing (blow with pressurized air).

Thread Inserts, Inserting

- Screw thread insert - 3 - on to installing spindle until 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 installing spindle.

- Break off the driver tang of the threaded insert using the tang breaker - 1 -.





- Install subframe (suspension subframe) (tightening specifications)