Front Subframe: Service and Repair

Subframe Mounting Threads, Repairing

CAUTION!
Observe safety precautions.

• Subframe (suspension subframe) was already removed.

• In the example, thread repair on this vehicle is described for left front longitudinal member for subframe and is to be employed at the other threads accordingly as necessary.

Special tools, testers and auxiliary items required

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

• Drill (VAS 6267)





1 Helicoil Thread Insert

• Replace the longitudinal member if it gets damaged again.

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 (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

- 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) (tightening specification).