Captiva

Oil Pressure Diagnosis and Testing - LE5 or LE9

Special Tools

For equivalent regional tools, refer to Special Tools : LE5 or LE9 .

1. 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.

2. 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.

3. Inspect for the following:

-	Correct oil filter with anti-drain back feature and O-ring on the cylinder block side of the filter

-	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 gauge

-	Plugged oil filter

-	Malfunctioning oil bypass valve

4. Remove the oil pressure sender or another engine block oil gallery plug.
5. Install EN-21867-850 adapter and CH-48027 gauge and measure the engine oil pressure.
6. Compare the readings to specifications. Refer to Engine Mechanical Specifications : LE5 or LE9 .
7. If the engine oil pressure is below specifications, inspect the engine for one or more of the following:

•	Correct oil filter with anti-drain back feature and O-ring on the cylinder block side of the filter

•	Oil pump worn or dirty

Refer to Oil Pump Disassemble : LE5 or LE9 .

•	Oil pump-to-engine front cover bolts loose

Refer to Engine Front Cover and Oil Pump Installation : LE5 or LE9 .

•	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

Refer to Crankshaft and Bearing Cleaning and Inspection : LE5 or LE9 .

•	Cracked, porous or restricted oil galleries

•	Oil gallery plugs missing or incorrectly installed

Refer to Engine Block Assemble : LE5 or LE9 .

•	Broken lash adjusters