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 once again, the retaining bracket must be replaced. Replace retaining bracket. Refer to => [ Subframe Bracket ] 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
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
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 subframe (suspension subframe). Tighten to specifications.