| • | Low oil level. Fill to full mark on oil level indicator. |
| • | Incorrect or malfunctioning oil pressure switch |
| • | Incorrect or malfunctioning oil pressure gauge |
| • | Improper oil viscosity for the expected temperature |
| • | Malfunctioning oil pump pressure regulator valve |
| • | Oil pump screen loose plugged, or damaged |
| • | Excessive bearing clearance. Replace as necessary. |
| • | Cracked, porous or restricted oil galleries. Repair or replace
block. |
| • | Oil gallery plugs missing or incorrectly installed. Install plugs
or repair as necessary. |
| • | Oil diluted by moisture or unburned fuel |
