Low or No Oil Pressure

^ Low oil level. Fill to the full mark on the oil level indicator.

^ Slow idle speed.

^ Incorrect or malfunctioning oil pressure switch. Replace it with a proper switch.

^ Incorrect or malfunctioning oil pressure gauge. Replace it with a proper gauge.

^ Improper oil viscosity or deluded oil.

- Install oil of proper viscosity for expected temperature.

- Install new oil if it is diluted with moisture or unburned fuel mixture.

^ The oil pump is worn or dirty. Clean or replace the pump.

^ The oil filter is plugged. Replace the filter.

^ The oil pickup screen is loose or plugged. Tighten or replace the screen.

^ A hole in the oil pickup tube. Replace the pickup tube.

^ Excessive bearing clearance. Replace if necessary.

^ Cracked, porous, or plugged oil galleries. Repair or replace the block.

^ The gallery plugs are missing or improperly installed. Install or repair as necessary.

^ The pressure regulator valve is stuck.

- Check for valve sticking in bore.

- Bore scoring and burrs.

^ The camshaft is worn or poor machining. Replace the camshaft.

^ Worn valve guides.