Oil Pressure Test - Diesel

For information on Ford Color Coded Illustrations refer to OEM COLOR CODING INFORMATION

1. NOTE: It is necessary to disconnect the battery to avoid setting any DTCs that could cause the PCM to command the oil pressure to other than what should be observed from a correctly operating system during the oil pressure test.

   Disconnect the battery ground cable.For additional information, refer to: Battery Disconnect and Connect .

2. NOTE: The EOP sensor adapter is left installed during the oil pressure test.

   Remove the EOP sensor.For additional information, refer to: Engine Oil Pressure (EOP) Sensor .

3. NOTE: The VDOP (variable displacement oil pump) solenoid and the EOP sensor must be connected and functional during the oil pressure test.

   Assemble the oil pressure adaptors as needed to the oil gallery port. Install the commercially available oil pressure gauge.

   1. M12x1.5 Male to 1/8 NPT Female adaptor 2. 1/8 NPT Male to two 1/8 NPT Female T-fitting 3. Commercially available oil pressure gauge 4. 1/8 NPT Male to M12x1.5 Female adaptor 5. Oil pressure sensor

   Courtesy of FORD MOTOR COMPANY

4. Connect the EOP sensor electrical connector.
5. Connect the battery ground cable.For additional information, refer to: Battery Disconnect and Connect .
6. Run the engine until normal operating temperature is reached.
7. Run the engine at the specified rpm and record the gauge reading.
8. The oil pressure should be within specifications for the acceptable oil pressure range and specific vehicle requirements.For additional information, refer to: Specifications .
9. If the pressure is not within specification, check the following possible sources:

   Visual Inspection Chart 

   Mechanical
   Insufficient oil Oil leakage Worn or damaged oil pump Oil pump screen cover and tube Excessive main bearing clearance Excessive connecting rod bearing clearance

10. Disconnect the battery ground cable.For additional information, refer to: Battery Disconnect and Connect .
11. Disconnect the EOP sensor electrical connector.
12. Remove the commercially available oil pressure gauge. Remove the oil pressure adaptors.
13. Install the EOP sensor.For additional information, refer to: Engine Oil Pressure (EOP) Sensor .
14. Connect the battery ground cable.For additional information, refer to: Battery Disconnect and Connect .