Low Oil Pressure

- Slow idle speed.

- Incorrect or malfunctioning oil pressure switch.

- Incorrect or malfunctioning oil pressure gage. Replace with proper gage.

- Improper oil viscosity or diluted oil. Install oil of proper viscosity for expected temperature, or install new oil if diluted with moisture or unburned fuel mixtures.

- Oil pump worn or dirty.

- Plugged oil filter.

- Oil pickup screen loose or plugged.

- Hole in oil pickup tube.

- Excessive bearing clearance. Replace if necessary.

- Cracked, porous or plugged oil galleys. Repair or replace block.

- Galley plugs missing or incorrectly installed. Install plugs, or repair as necessary.