- With the vehicle on a level surface, allow adequate drain down time of 2-3 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 conditions:
| • | 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 or another engine block oil gallery plug.
- Install an oil pressure gage and measure the engine oil pressure.
- Compare the readings to the specifications. Refer to
Engine Mechanical Specifications.
- If the engine oil pressure is below specifications, inspect the engine for 1 or more of the following conditions:
| • | Oil pump-to-engine front cover bolts loose |
| • | Oil pump screen loose, plugged, or damaged |
| • | Oil pump screen O-ring seal missing or damaged |
| • | Malfunctioning oil pump pressure regulator valve |
| • | Excessive bearing clearance |
| • | Cracked, porous or restricted oil galleries |
| • | Oil gallery plugs missing or incorrectly installed |
