Impreza GT F4-2.5L Turbo (2009)
3) Remove the ST.
ST 499747100 CLUTCH DISC GUIDE
4) Install the transmission assembly.
INSPECTION
CLUTCH DISC
1) Facing wear Measure the depth from the facing surface to the rivet head. Replace if the face is worn locally or worn down to less than the specified
value.
Depth to rivet head:
Limit of sinking
0.3 mm (0.012 in)
NOTE:
Do not wash the clutch disc with any type of cleaning fluid.
2) Hardened facing
Replace the clutch disc.
3) Oil soakage on facing
Replace the clutch disc and inspect the transmission front oil seal, transmission case mating surface, engine rear oil seal and other locations for oil
leakage.
