Oil Pressure Test

The amount of oil an engine uses will vary with the way the vehicle is driven in addition to normal engine-to-engine variation. This is especially true during the first 16,100 km (10,000 mi) when a new engine is being broken in or until certain internal engine components become conditioned. Vehicles used in heavy-duty operation may use more oil. The following are examples of heavy-duty operation:
^ Trailer towing applications.
^ Severe loading applications.
^ Sustained high speed or idle operation.

The following is a partial list of conditions that can affect oil consumption rates:
^ Proper maintenance.
^ Engine size.
^ Operator driving habits.
^ Ambient temperature.
^ Quality and viscosity of the oil.

Operation under varying conditions can frequently be misleading. A vehicle that has been run for several thousand miles on short trips or in below-freezing ambient temperatures may have consumed a "normal" amount of oil. However, when checking the engine oil level, it may measure up to the MAX mark on the oil level dipstick due to dilution (condensation and fuel) in the engine crankcase. The vehicle might then be driven at high speeds on the highway where the condensation and fuel boil off. The next time the engine oil is checked, it may appear that a liter (quart) of oil was used in about 160 km (100 mi). This perceived 160 km (100 mi) per liter (quart) oil consumption rate causes customer concern even though the actual overall oil consumption rate is about 2400 km (1500 miles) per liter (quart).

Make sure the selected engine oil meets Ford specification ESE-M2C153-E and the recommended API performance category and SAE viscosity grade as shown in the vehicle Owner Guide. It is also important that the engine oil is changed at the intervals specified for the typical operating conditions.

1. Disconnect and remove the oil pressure sensor from the engine.
2. Connect Engine Oil Pressure Gauge and Transmission Test Adapter to the oil pressure sender oil galley port.
3. Run the engine until normal operating temperature is reached.
4. Run the engine at 3000 RPM and record the gauge reading.
5. The oil pressure should be within specification.
6. If the pressure is not within specification, check the following possible sources:
^ Insufficient oil.
^ Oil leakage.
^ Worn or damaged oil pump.
^ Oil pump screen cover and tube.
^ Excessive main bearing clearance.
^ Excessive connecting rod bearing clearance.