For 1990-2009 cars

1. Remove the O-rings from the flywheel housing and discard.
2. Clean the flywheel housing.
3. Clean the flywheel housing mating surfaces.
4. Clean the flywheel housing O-ring sealing area.
5. Inspect the flywheel housing for cracks.
6. Inspect the flywheel housing mating surfaces for damage.
7. Inspect the crankshaft rear oil seal bore for damage.
8. Replace the flywheel housing if any damage is found.