G6 L4-2.4L VIN B (2006)
Engine Oil Pressure: Testing and Inspection
Oil Pressure Diagnosis and Testing
^
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:
-
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
-
Plugged oil filter
-
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 specifications. Refer to Engine Mechanical Specifications.
^
If the engine oil pressure is below specifications, inspect the engine for one or more of the following:
-
Oil pump worn or dirty Refer to Oil Pump Disassemble.
-
Oil pump-to-engine front cover bolts loose Refer to Engine Front Cover and Oil Pump Installation.
-
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 Bearings Cleaning and Inspection.
-
Cracked, porous or restricted oil galleries
-
Oil gallery plugs missing or incorrectly installed Refer to Engine Block Assemble.
-
Broken lash adjusters