The following conditions may cause low or no oil pressure
- Low oil level Fill to the full mark on the oil level indicator.
- Incorrect or malfunctioning oil pressure switch Replace the oil pressure switch.
- Incorrect or malfunctioning oil pressure gage Replace the oil pressure gage.
- Improper oil viscosity or diluted oil Install oil of proper viscosity for expected temperature. Install new oil if the oil is diluted.
- A worn or dirty oil pump Clean or replace the oil pump.
- A plugged oil filter Replace the oil filter.
- A loose or plugged oil pickup screen Replace the oil pickup screen.
- A hole in the oil pickup tube Replace the oil pickup tube.
- Excessive bearing clearance Replace the bearings.
- Cracked, porous, or plugged oil gallery Repair or replace the engine block.
- Missing or improperly installed gallery plugs Install or repair the plugs as needed.
- A stuck pressure regulator valve Inspect the pressure regulator valve for sticking in the bore. Inspect the bore for scoring and burrs.
- A worn or poorly machined camshaft Replace the camshaft.