| • | With the vehicle on a level surface, allow an adequate drain down
time of 10 minutes and measure for a low oil level. |
| | Add
the recommended grade engine oil and fill the crankcase until the oil level
measures full on the oil level indicator. |
| • | Run the engine and verify low or no oil pressure on the vehicle
gage or light. |
| | Listen for a noisy valve train or a knocking noise. |
| • | Inspect for the following: |
| - | Oil diluted by moisture or unburned fuel mixtures |
| - | Improper oil viscosity for the expected temperature |
| - | Incorrect or malfunctioning oil pressure sender |
| - | Incorrect or malfunctioning oil pressure gage |
| - | Malfunctioning oil bypass valve |
| • | Remove the oil pressure sender. |
| • | Install a oil pressure gage and measure the engine oil pressure. |
| • | If the engine oil pressure is below specifications, inspect the
engine for one or more of the following: |
| - | Oil pump-to-engine block bolts loose |
| - | Oil pump screen loose, plugged, or damaged |
| - | Malfunctioning oil pump pressure regulator valve |
| - | Excessive bearing clearance |
| - | Cracked, porous or restricted oil galleries |
| - | Oil gallery plugs missing or incorrectly installed |
