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. |
| • | 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. |
