For 1990-2009 cars

### Low or No Oil Pressure

The following can cause 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 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 it is diluted.

• | The oil pump is worn or dirty -- clean or replace the oil pump.

• | The oil filter is plugged -- replace the oil filter.

• | The oil pickup screen is loose or plugged -- 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 galleries -- repair or replace the engine block.

• | The gallery plugs are missing or improperly installed -- install or repair as necessary.

• | The pressure regulator valve is stuck.

- | Check the pressure regulator valve for sticking in the bore.

- | Check the bore for scoring and burrs.

• | The camshaft is worn or poorly machined -- replace the camshaft.

• | Worn valve guides -- repair as needed.