Tools Required
• | J 42907
Oil Pressure Testing Tool |
- With the vehicle on a level surface, run the vehicle for a few minutes, allow adequate drain down time of
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, approximately 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 |
- Remove the oil filter and install the
J 42907
.
- Install
J 21867
or equivalent to the
J 42907
.
- 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 one 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 pressure regulator valve |
• | Excessive bearing clearance |
• | Cracked, porous, or restricted oil galleries |
• | Oil gallery plugs missing or incorrectly installed |
- If the oil pressure reading on the
J 21867
or equivalent is within specifications, inspect for the following conditions:
• | Plugged or incorrect oil filter and/or malfunctioning oil bypass valve |
• | Malfunctioning oil pressure gage or sensor |