Clutch Disc

WARNING: This page is about a different variant/trim than selected.

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

0.8 mm (0.031 in)

NOTE: Do not wash the clutch disc with any type of cleaning fluid.

Fig 1: Checking Clutch Disc Facing Wear
Courtesy of SUBARU OF AMERICA, INC.
Hardened facing
Replace the clutch disc.
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.

Fig 2: Identifying Clutch Disc Facing
Courtesy of SUBARU OF AMERICA, INC.
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:

STI model

0.7 mm (0.028 in) at R = 115 mm (4.53 in)

Except for STI model

0.7 mm (0.028 in) at R = 110 mm (4.33 in)

Fig 3: Checking Deflection On Clutch Facing
Courtesy of SUBARU OF AMERICA, INC.
If there is spline wear, loose rivets, failed damper springs, etc., replace the clutch disc.

Fig 4: Identifying Spline, Damper Springs And Rivet

Courtesy of SUBARU OF AMERICA, INC.