Impreza GT F4-2.5L Turbo (2009)
4) Deflection on facing
If deflection exceeds the specified value at the outer circumference of the facing, replace the clutch disc.
ST 499747100 CLUTCH DISC GUIDE
Limit for deflection:
0.7 mm (0.028 in) at R = 110 mm (4.33 in)
5) If there is spline wear, loose rivets, failed damper springs, etc., replace the clutch disc.
CLUTCH COVER
NOTE:
Visually check the following items without disassembling, and replace or repair if defective.
1) Loose thrust rivet
2) Damaged or worn bearing contact area at the center of diaphragm spring
