• | Damaged gasket sealing surfaces (1) |
• | Worn, scored, or loose bearing races or worn bearing race bores (2) |
• | Damaged bolt threads (3) |
• | Damaged oil seal bores (4) |
• | A loose, damaged, or restricted vent tube (5) |
• | Damaged speed sensor bore (6) |
• | Porosity |
• | Damage to the exterior of the case/housings |