For 1990-2009 cars

• | 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.