Tools Required
- Review the system operation in order to familiarize yourself with the system functions. As required, disable the auto-stop function prior to repair. Refer to
Hybrid Modes of Operation Description.
- With the vehicle on a level surface, run the vehicle for a few minutes. Allow adequate drain down time, 2-3 minutes, and measure the oil level.
- If required, add the recommended grade engine oil and fill the crankcase until the oil level measures full on the oil level indicator.
- Run the engine briefly, 10-15 seconds, 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 water or glycol antifreeze |
• | Foamy oil, which may be caused by a cut or damaged oil pump screen O-ring seal |
- Remove the oil filter and install the
EN-47971 (1).
- Install the
J 21867 (2), or equivalent to the
EN-47971 (1).
- Run the engine and measure the engine oil pressure.
- Compare the readings 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 block bolts loose |
• | Oil pump screen loose, plugged, or damaged |
• | Oil pump screen O-ring seal missing or damaged |
• | Malfunctioning oil pump |
• | Excessive bearing clearance |
• | Cracked, porous, or restricted oil galleries |
• | Oil gallery plugs missing or incorrectly installed |
• | Improper operation of the active fuel management oil pressure relief valve |