Removal and Replacement

518941 Repairing Threaded Bushes For Suspension Subframe Installation









Installing threaded bush

NOTE: Improper thread repairs
- Damaged threads

- Thread repairs can only be carried out using the Time-Sert thread repair system.

- The repair bush must be installed recessed. Milling in may only be performed using the Porsche special tool contained in the Time-Sert thread repair kit.
- While pressing in the base thread, a noticeably larger amount of force is required on the screw-in tool to form the internal thread. Pressing is finished when the screw-in tool can be turned further more easily.

1. Drill out thread
Select M10 or M14 kit.
Drill out old thread as far as the base of the thread using a drill bit contained in the M10 or M14 kit B.






2. Mill in shoulder
Select M10 or M14 kit.
Mill out bore hole up to dimension X using spot facer C. Milling in may only be performed using the tool contained in the Porsche special tools. Use an electronically controlled power drill set to a speed of approx. 250 rpm (1/min) for milling in.






3. Cut thread
Cut thread into the chassis bushing using a cutting tool D up to dimension Y. Clean the thread on the chassis bushing (blow it out).






4. Position threaded bush on the screw-in tool.
Clean the thread on the bush and screw-in tool.
Oil the screw-in tool E.
Screw the threaded bush A onto the screw-in tool E by hand.






5. Screw in threaded bush
Screw threaded bush A in fully (note bush length classification) using the screw-in tool E.






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






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

Table classification for suspension subframe repairs