Mariner 2WD L4-2.5L Hybrid (2010)
Engine Oil Pressure: Testing and Inspection
Engine
Component Tests
The following component tests are used to diagnose engine concerns.
Oil Pressure Test
1. Disconnect and remove the Engine Oil Pressure (EOP) switch from the engine.
2. Connect the Engine Oil Pressure Gauge to the oil pressure sender oil galley port.
3. Run the engine until normal operating temperature is reached.
4. Run the engine at the specified rpm and record the gauge reading.
5. The oil pressure should be within specifications; for additional information, refer to the specification chart in the appropriate engine system.
6. If the pressure is not within specification, check the following possible sources:
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Insufficient oil
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Oil leakage
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Worn or damaged oil pump
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Oil pump screen cover and tube
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Excessive main bearing clearance
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Excessive connecting rod bearing clearance
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Chain tensioner leak
