Replacing the flywheel toothed rim (BMW 3 Series E21)

Check the condition of the flywheel toothed rim and, if the teeth are significantly worn, replace the toothed rim.

Drill a hole about 8mm deep into the rim just below the tooth valley using a 6.5mm drill bit.

Insert the chisel into the gap between the teeth of the rim and strike it sharply to split the rim.

Heat the new rim uniformly to a temperature of no more than 200-230°C and press it onto the flywheel with the chamfer on the inner diameter. Exceeding the specified temperature is not allowed. A thermochromic pencil should be used to control the temperature.

Drive the rim onto the flywheel by striking it with a bronze drift.