Procedures

Repairing Threaded Bush For Suspension Subframe Mount

Tools







Technical values







Tools and materials







INFORMATION: To mill the required shoulder, the tool with the designation Spot facer for Time-Sert thread repair set NR.122-2 must be used. The tool provided with the complete set supplied must not be used in this case.







Installing repair threaded bush

NOTICE: Risk of material damage due to incorrectly screwed joints on chassis parts following thread repair.
- Threaded joints may not be secured correctly following repairs due to modified chassis mounting points on the rear axle on MY 08 vehicles.
- The rear axle must always be secured using the HEXAGON-HEAD BOLT N.909.763.02 following repairs to the chassis bush.
- Always replace fastening screws for the chassis bush following repairs.










INFORMATION: The repair bush must be installed recessed. To mill the required shoulder, the tool with the designation Spot facer for Time-Sert thread repair set NR.122-2 must be used. The tool provided with the complete set supplied must not be used in this case.

1. Drill out thread.
1.1. Drill out the old thread with a drill to the root of the thread.

2. Mill shoulder.
2.1. Mill out drill hole with spot facer -C- to dimension -X-. Test and adjustment value: 10 mm. Milling must only be performed using tool Spot facer for Time-Sert thread repair set NR.122-2.
For milling, use an electronically controlled power drill set at a speed of approx. 250 1 /min.







3. Cut thread.
3.1. Cut thread using a cutting tool -D- up to dimension -Y- in the chassis bushing. Test and adjustment value: 40 mm. Clean thread on chassis bushing (blow out swarf).







4. Position threaded bush on screw-in tool.
4.1. Clean thread on bush and on screw-in tool.
4.2. Oil the screw-in tool -E-.







4.3. Screw the threaded bush -A- onto the screw-in tool -E- by hand.







5. Screw in threaded bush.
5.1. Fully screw in the threaded bush using the screw-in tool -E-.







INFORMATION: While pressing in the base thread, a noticeably larger amount of force on the screw-in tool is required to form the internal thread. Pressing is finished when the screw-in tool can be turned further more easily.

6. Press threaded bush.
6.1. Form and press the threaded bush by turning further with the screw-in tool -E- in the base thread.







7. Unscrew the screw-in tool -E- from the threaded bush.