Oil Pressure Diagnosis and Testing
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Oil Pressure Diagnosis and Testing
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Tools Required
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J-21867-6 Oil Pressure Adapter Fitting
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1.
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Let the engine run a few minutes while the vehicle is parked on a level surface. Let the oil run out of the system (2-3 minutes) and check whether the engine oil level is low.
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2.
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If required, add the recommended grade engine oil and fill the crankcase until the oil level measures full on the oil level indicator.
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3.
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Run the engine briefly, 10-15 seconds, and verify low or no oil pressure on the vehicle gauge or light.
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4.
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Listen for a noisy valve train or a knocking noise.
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Oil diluted by the following:
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Malfunctioning oil filter bypass valve
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Incorrect or faulty oil pressure gauge
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Incorrect or faulty oil pressure gauge sensor
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Improper engine oil viscosity for the expected temperature
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6.
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Disconnect the oil pressure sensor wiring harness.
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7.
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Remove the oil pressure sensor.
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8.
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Install the J 21867 with the J-21867-6.
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9.
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Measure the engine oil pressure.
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11.
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If the engine oil pressure is below specifications, inspect the engine for 1 or more of the following conditions:
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Loose oil filter adapter bolts
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Missing or damaged oil filter adapter O-ring seal or seals
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Loose oil pump-to-engine block bolts
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Loose, plugged or damaged oil pump screen
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Missing or damaged oil pump screen O-ring seal
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Damage or leak in the oil pump screen suction tube
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Malfunctioning oil pump pressure regulator valve
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Missing or incorrectly installed oil gallery plugs
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Loose camshaft intermediate drive shaft bolts
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Excessive bearing clearance for the following:
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Camshaft intermediate drive shaft sprocket
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Cracked, porous or restricted oil galleries
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12.
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Repair or replace the components, as required.
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