Porsche 928 Workshop Manual page 134

13
Engine/Crankshaft, Pistons 928
MACHINING FLYWHEEL
The bearing surface for the drive plate on the flywheel can be machined in a lathe when
seriously scored or burnt.
The metal removal should be kept as small as possible.
Wear limit for flywheel thickness: 11.8 mm.
27 r3
1 = Wear limit 11.8 mm
2 = Smallest possible metal removal
3 = Max. runout 0.05 mm
Bearing surface machining specifications:
Surface finish + waviness = 0.008 mm.
MACHININGFLYWHEEL - Beginning with 1984 Models
Engine Type M 28.21
1 = Wear limit 27.5 mm
l
13.IOb
Machining Flywheel
Printed in Germany
Machining Flywheel - 1984 Models