Oil Pressure Diagnosis and Testing
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Oil Pressure Diagnosis and Testing
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1.
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With the vehicle on a level surface, allow adequate drain down time of 2-3 minutes and measure for a low oil level.
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2.
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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, 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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5.
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Inspect for the following conditions:
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Correct oil filter with anti-drain back feature and O-ring on the cylinder block side of the filter
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Oil diluted by moisture or unburned fuel mixtures
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Improper oil viscosity for the expected temperature
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Incorrect or malfunctioning oil pressure sender
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Incorrect or malfunctioning oil pressure gauge
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Malfunctioning oil bypass valve
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6.
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Remove the oil pressure sender or another engine block oil gallery plug.
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7.
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Install an oil pressure gauge and measure the engine oil pressure.
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9.
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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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Correct oil filter with anti-drain back feature and O-ring on the cylinder block side of the filter
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Oil pump screen loose, plugged, or damaged
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Oil pump screen O-ring seal missing or damaged
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Malfunctioning oil pump pressure regulator valve
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Cracked, porous or restricted oil galleries
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