Tap thread in spark plug hole and screw in threaded insert - AR01.30-P-5440-01B

Fig 1: Identifying Heli-Coil Repair Set (102 589 00 99 00)

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

1. Remove pilot bushing (1) of tapped hole device .
2. Fill the swarf grooves of the combination tap (4) with grease for bonding the swarfs.
3. Cut combination tap (4) into corresponding spark plug thread. Screw in combination tap (4) until the guide tube (3) is seated and forms a fully compress with the stop ring (2).

   Screw out after 5 revolutions on removed cylinder head combination tap (4), clean the swarf grooves from swarfs and grease, refill with grease and finish cutting thread. After cutting.

   Blow out spark plug thread and cylinder with compressed air.

   Fig 2: Identifying Pilot Bushing, Stop Ring, Guide Tube And Combination Tap

   Courtesy of MERCEDES-BENZ OF NORTH AMERICA.
4. Select heli-coil threaded insert (8) with block length 10.2 mm.
5. Insert threaded insert (8) with primary pump drive pointing in direction of prestressing cartridge (16) in the installation tool (13) (arrow).
6. Screw in threaded insert (8) flush to prestressing cartridge (16) (arrow).
   Fig 3: Identifying Installation Tool, Threaded Insert And Cartridge

   Courtesy of MERCEDES-BENZ OF NORTH AMERICA.
7. Position HC-installation tool on tapped hole
8. Hold jacket sleeve (5)
9. Rotate screw-in spindle (6) until the stop ring (7) is positioned on the jacket sleeve (5). Slightly turn back a clamping jacket sleeve when screwing-in.
   Fig 4: Identifying Jacket Sleeve, Spindle And Stop Ring

   Courtesy of MERCEDES-BENZ OF NORTH AMERICA.
10. Insert sleeve (9) via primary pump drive of HELI-COIL insert
11. Guide open pliers to the marking in the sleeve (9) and fix with primary pump drive
12. Close pliers , the serrated lock of pliers must latch.
13. Rotate sleeve (9) toward left as far as the stop and hold
14. Dismount primary pump drive, to do so move pliers slightly up and down.

Remove with a magnet the primary pump drive which had fallen onto the piston crown!

Fig 5: Identifying Sleeve

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.