Low or No Oil Pressure

- 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.
- Oil pump worn or dirty.
- Malfunctioning oil pump pressure regulator valve.
- Plugged oil filter.
- 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 mixtures.