Installing Repair Threaded Bush

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Fig 1: Identifying Threaded Bush For Suspension Subframe Mount Installation Position

Courtesy of PORSCHE CARS NORTH AMERICA, INC.

Screw point for diagonal brace mounting
Screw point for rear axle mounting, front
Screw point for rear axle mounting, center
Screw point for engine mounting
Screw point for transmission mounting
Screw point for front axle mounting, rear

NOTE: Improper thread repairs

Damaged thread

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

Information

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.

Information

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.

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 .

Fig 2: Drilling Out Thread
Courtesy of PORSCHE CARS NORTH AMERICA, INC.
Mill in shoulder
Select M10 or M14 kit.

Mill out bore hole up to dimension X using spot facer C . See SUSPENSION SUBFRAME REPAIRS CLASSIFICATION . 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.

Fig 3: Identifying Shoulder Bore Hole Dimension
Courtesy of PORSCHE CARS NORTH AMERICA, INC.
Cut thread
Cut thread into the chassis bushing using a cutting tool D up to dimension Y . See SUSPENSION SUBFRAME REPAIRS CLASSIFICATION . Clean the thread on the chassis bushing (blow it out).

Fig 4: Cutting Thread
Courtesy of PORSCHE CARS NORTH AMERICA, INC.
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.

Fig 5: Positioning Threaded Bush On Screw-In Tool
Courtesy of PORSCHE CARS NORTH AMERICA, INC.
Screw in threaded bush
Screw threaded bush A in fully (note bush length classification) using the screw-in tool E .

Fig 6: Installing Threaded Bush
Courtesy of PORSCHE CARS NORTH AMERICA, INC.
Press threaded bush
Shape and press threaded bush E by turning further with the screw-in tool D in the base thread.

Fig 7: Pressing Threaded Bush
Courtesy of PORSCHE CARS NORTH AMERICA, INC.
Unscrew screw-in tool
Unscrew screw-in tool E from the threaded bush A .

SUSPENSION SUBFRAME REPAIRS CLASSIFICATION

Designation	Bore stroke measured from outer edge of sheet to tip of drill bit	Milling depth X	Thread depth Y	Bush length	Note
Threaded bush 1 Diagonal brace screw point Time-Sert thread repair kit 9394	45 mm	9 mm	35 mm	20 mm	Measured from outer edge of sheet M10 x 1.5 thread
Threaded bush 2 Screw point for mounting front rear-axle side section Time-Sert thread repair kit 9395	39 mm	11 mm	40 mm	24 mm	Measured from outer edge of sheet M12 x 1.5 thread
Threaded bush 3 Screw point for mounting center rear-axle side section Time-Sert thread repair kit 9395	39 mm	11 mm	40 mm	24 mm	Measured from outer edge of sheet M12 x 1.5 thread
Threaded bush 4 Screw point for engine mounting Time-Sert thread repair kit 9390	30 mm	10 mm	27 mm	16.2 mm	Measured from outer edge of sheet M8 thread
Threaded bush 5 Screw point for mounting transmission Time-Sert thread repair kit 9393	35 mm	10 mm	27 mm	14 mm	Measured from outer edge of sheet M10 x 1.5 thread
Threaded bush 6 Screw point for front axle, rear Time-Sert thread repair kit 9396	25 mm	1.8 mm	34 mm	26 mm	Measured from outer edge of sheet M14 x 1.5 thread