911 Carrera 4S Coupe AWD F6-3600cc 3.6L SOHC (1997)
Clutch Disc: Testing and Inspection
NOTE: Clutch Drive Plate Removed
Using a depth gage or sliding calipers, measure distance X from surface of lining to rivet head.
NOTE: Measure only at the beaded-over side of the rivet head.
Wear limit X is 0.3 mm (see drawing).
When the drive plate is new, this dimension is approx. 1.0 mm.
Note that lining wear is not linear, i.e. not at a steady rate throughout the clutch's operating life.
The way in which the lining material beds down and is compressed initially suggests that greater lining wear is taking place, but as the car is driven
further, the rate of wear declines considerably.