- Remove the oil filter fitting (438) and bypass valve (436), as required.
Refer to
Oil Filter and Adapter Removal
.
- Clean the oil pan in solvent.
Caution: Refer to Safety Glasses Caution in the Preface section.
- Dry the oil pan with compressed air.
- Inspect the oil pan for the following conditions:
| • | Damaged gasket surfaces (1) |
| • | Restrictions within the oil passages (2) of the pan |
| • | Damaged oil filter seal surface (3) or inoperative oil filter bypass valve |
| • | Lightly depress the valve. The valve spring should seat the valve to the proper closed position. |
| • | Threaded bolt holes (4) for damage |
