Repairing threaded bores for cylinder head bolts - RA01001041220X(01-1220)
WARNING: This page does not describe the selected car, but rather 42 other vehicles, including the 1999 Mercedes-Benz S600, 1999 Mercedes-Benz S500, 1999 Mercedes-Benz S420, 1999 Mercedes-Benz S320, and 1999 Mercedes-Benz CL600. However, it is still accessible from the selected car via links, so may be relevant.
Preceding work:
Cylinder head removed (01-4150) .
Operation no. of operation texts and work units or standard texts and flat rates:
Bore
HELI-COIL thread
HELI-COIL thread
widen, pay attention to core plug depth.
tap.
screw in.
DATA IN MM
| Ø size a | 14.00 - 14.27 |
| Twist drill Ø | 12.5 |
| Core hole depth from contact surface | 35 |
| HELI-COIL threaded insert below contact surface | 5.3 |
| HELI-COIL thread length screwed in | 26 |
| HELI-COIL thread length block size | 23.1 |
COMMERCIALLY AVAILABLE TOOL
| HELI-COIL M12 hand thread tap for pre-tapping | e.g. | Bollhoff GmbH Postfach 14 02 29 D-33622 Bielefeld Order no. 0140 0120 104 |
| HELI-COIL M12 hand thread tap for final tapping | e.g. | Bollhoff GmbH Postfach 14 02 29 D-33622 Bielefeld Order no. 0140 2120 102 |
| HELI-COIL M12 hand installation tool | e.g. | Bollhoff GmbH Postfach 14 02 29 D-33622 Bielefeld Order no. 0150 0112 300 |
| HELI-COIL M12 X 1.75 threaded insert | e.g. | Bollhoff GmbH Postfach 14 02 29 D-33622 Bielefeld Order no. 0130 0120 024 |