Repairing Subframe Mounting Threads

Repairing Subframe Mounting Threads

CAUTION!
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 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, replace the retaining bracket. Refer to => [ Subframe Mounting Bracket ] Subframe Mounting 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, Repairing

Threads, Drilling

CAUTION!
Wear protective eyewear when drilling out the threads.

- Drill out the threads with the spiral drill.

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

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

• Do not angle the drill.

Threads, Cutting

CAUTION!
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

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