Inspection After Disassembly

WARNING: This page is about a different car, the 2018 Nissan Titan XD. However, it is still accessible from the selected car via links, so may be relevant.

Inspect the front cover for cracks, leaks, or other damage. Inspect the oil and coolant passages for contamination or blockage.
Damaged bolt holes in the front cover can be repaired or replace component as required.
If the oil bypass valve are damaged or inoperable, they must be replaced.
Replace the front cover if any damage is found that can not be repaired.
Install the bypass valve.