Vehicles after change point in 1982
REPLACING STARTER GEAR
RING
Drill a 6 mm (0.236") diameter hole approx. 8 mm (0.315") deep below a tooth
gap to make breaking the gear ring easier.

63011170 - click to zoom
 
Break gear ring at drilled point with a chisel.

63011171 - click to zoom
 
Installation:
Heat the new starter gear ring to 200 ... 230° C (395 to 445° F), checking the
temperature with a thermochrome pencil.
Tooth bevel faces the engine end.
Knock on the starter gear ring to fit snug with brass mandrel.

63011172 - click to zoom