Renewing welded nut — VW

🧭 Before you start

Don't miss

• A securing bolt (10.9) should always be used. (Tightening torque 100 Nm.)
• Tapped hole for wishbone securing bolt on body must be free of underseal.

🔩 Torque settings

Values can differ between engine variants — check the code stamped on your block.

ℹ️ Always cross-check the exact figure against your vehicle's factory manual before final tightening — a wrong torque can damage the engine. These values are extracted from workshop data and may not cover every variant or revision.

📋 Procedure

1. In isolated cases the thread of the welded nut in the front cross member gets damaged when repairs are being carried out on the wishbone. When this happens the nut should be renewed as described here.
2. A securing bolt (10.9) should always be used. (Tightening torque 100 Nm.) — 100 Nm (74 lb-ft)
3. A lock washer should be used under the bolt head.
4. Cut cross member open.
5. Part welding seam with grinder and parting disc.

6. Drill 4 spot welds out.
7. Bend sheet metal away (arrow).
8. Remove hard foam in area.
9. Chisel nut off.
10. Remove burr.
11. Secure nut with bolt with chamfer contacting sheet metal (align with hole centre).
12. Weld nut on. SG-continous weld.
13. Bend sheet metal back (without creasing) and weld again. SG-continous weld. SG-plug weld 4 x. Grind welds if necessary.
14. Cut reinforcement plate to shape.
15. Drill 16 holes 8 mm diameter (for plug welding).
16. Clamp reinforcement plate in position and weld on. SG continous weld. SG-plug weld (16 x).
17. Renew underseal (D 35), seal seams. Fill cavity with D 25 or D 26 foam. [Note: Tapped hole for wishbone securing bolt on body must be free of underseal.]

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