Mazda RX-8 Workshop Manual page 864

Rear Oil Seal Removal Note
1. Protect the eccentric shaft with cloth and remove the oil seal using the SST.
CAUTION:
Do not damage the contact area of the rear oil seal at the stationary gear and
eccentric shaft.
Rear Oil Seal Installation Note
1. Apply engine oil to the lip of a new rear oil seal.
2. Tap the rear oil seal evenly in the stationary gear using the SST.
CAUTION:
Insert until it is attached to the seating face.