Mazda RX-8 Workshop Manual page 2145

REAR OIL SEAL REPLACEMENT
3. Remove the flywheel using the SST.
4. Remove the key from the eccentric shaft.
Flywheel Installation Note
1. Install the key to the eccentric shaft.
2. Align the flywheel key groove with the eccentric shaft key and install.
3. Install the SST to the flywheel.
4. Tighten the locknut using the SST.
Tightening torque
392—490 N·m {40.0—49.9 kgf·m, 289—361 ft·lbf}
CAUTION:
Remove the seal protruding from the threads without it becoming caught in the pilot bearing.
[13B-MSP].)