Malibu V6-3.6L (2010)
9. Install the CH 48027 - gauge flexible hose to the EN-47971 - adapter.
10. Run the engine and measure the engine oil pressure.
11. Compare the readings to Engine Mechanical Specifications (See: Specifications/Service Limits & General Specifications).
12. If the engine oil pressure is below specifications, inspect the engine for 1 or more of the following conditions:
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Oil pump worn or dirty. Refer to Oil Pump Replacement (See: Service and Repair), Oil Pump Disassemble (See: Service and
Repair/Overhaul/66. Oil Pump Disassemble) and Oil Pump Cleaning and Inspection (See: Service and Repair/Overhaul/67. Oil Pump
Cleaning and Inspection).
*
Oil pump-to-engine block bolts loose. Refer to Oil Pump Replacement (See: Service and Repair).
*
Oil pump screen loose, plugged, or damaged. Refer to Oil Pump Suction Pipe and Screen Assembly Replacement (See: Oil Pick
Up/Strainer/Service and Repair) and Oil Pump Suction Pipe and Screen Cleaning and Inspection (See: Service and Repair/Overhaul/73. Oil
Pump Suction Pipe and Screen Cleaning and Inspection).
*
Oil pump screen O-ring seal missing or damaged. Refer to Oil Pump Suction Pipe and Screen Assembly Replacement (See: Oil Pick
Up/Strainer/Service and Repair) and Oil Pump Suction Pipe and Screen Cleaning and Inspection (See: Service and Repair/Overhaul/73. Oil
Pump Suction Pipe and Screen Cleaning and Inspection).
*
Oil pump pressure relief valve malfunction. Refer to Oil Pump Replacement (See: Service and Repair).
*
Engine bearing clearance excessive. Refer to Crankshaft and Bearing Cleaning and Inspection (See: Service and Repair/Overhaul/51.
Crankshaft and Bearing Cleaning and Inspection), Crankshaft and Bearing Installation (See: Service and Repair/Overhaul/90. Crankshaft and
Bearing Installation) and Piston, Connecting Rod, and Bearing Installation (See: Service and Repair/Overhaul/91. Piston, Connecting Rod,
and Bearing Installation).
*
Cracked, porous, or restricted oil galleries.
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Oil gallery plugs missing or incorrectly installed. Refer to Engine Block Assemble (See: Service and Repair/Overhaul/89. Engine Block
Assemble) and Cylinder Head Assemble (See: Service and Repair/Overhaul/61. Cylinder Head Assemble).
*
Valve lifters broken. Repair, as necessary. Refer to Valve Lifter Replacement - Left Side (See: Camshaft, Lifters and Push Rods/Lifter / Lash
Adjuster/Service and Repair/Valve Lifter Replacement - Left Side) and/or Valve Lifter Replacement - Right Side (See: Camshaft, Lifters and
Push Rods/Lifter / Lash Adjuster/Service and Repair/Valve Lifter Replacement - Right Side) and Valve Lifter Cleaning and Inspection (See:
Service and Repair/Overhaul/63. Valve Lifter Cleaning and Inspection).
Caution: This engine uses a special high performance oil filter. Use of any other filter may lead to filter failure and/or severe engine damage.
13. If the oil pressure reading on the CH 48027 - gauge, or equivalent, is within specifications, inspect for the following conditions:
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Plugged or incorrect oil filter and/or malfunctioning oil bypass valve. Refer to Engine Oil and Oil Filter Replacement (See: Engine
Oil/Service and Repair).
*
Malfunctioning oil pressure gauge or sensor. Repair, as necessary. Refer to Engine Oil Pressure Sensor and/or Switch Replacement (See: Oil
Pressure Sensor/Service and Repair).