Lincoln Navigator: Engine System - General Information / Oil Pressure Test. General Procedures

Oil Pressure Test 2.7L EcoBoost & 3.3L Duratec & 5.0L Ti-VCT

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 (414-01) .

1. Remove the EOP sensor. Refer to the appropriate 303-14 Electronic Engine Controls section.
   

1. 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

1. Connect the EOP sensor electrical connector.
   

1. Connect the battery ground cable.
   For additional information, refer to: Battery Disconnect and Connect (414-01) .

Oil Pressure Test 3.5L EcoBoost & 3.5L PowerBoost

1. With the vehicle in NEUTRAL, position it on a hoist.
   For additional information, refer to: Jacking and Lifting (100-02) .

1. Remove and discard the oil filter.
   

1. Connect a GearWrench 3289 Oil Pressure Tester Kit or equivalent oil pressure gauge to the oil filter housing.
   

All vehicles

1. Run the engine until normal operating temperature is reached.
   

1. Run the engine at the specified rpm and record the gauge reading.
   

1. The oil pressure should be within specifications. Refer to the 303-01 specifications procedure for each engine for the acceptable oil pressure range and specific vehicle requirements.
   

1. 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 Chain tensioner leak

Oil Pressure Test 3.5L EcoBoost & 3.5L PowerBoost

1. Remove the commercially available oil pressure gauge.
   

1. Install a new manufacturer-specified oil filter.
   

1. Check and refill the oil as needed, using new manufacturer-specified oil. Refer to the Specifications in the appropriate 303-01 section.
   

Oil Pressure Test 2.7L EcoBoost & 3.3L Duratec & 5.0L Ti-VCT

1. Disconnect the battery ground cable.
   For additional information, refer to: Battery Disconnect and Connect (414-01) .

1. Disconnect the EOP sensor electrical connector.
   

1. Remove the commercially available oil pressure gauge. Remove the oil pressure adaptors.
   

1. Install the EOP sensor. Refer to the appropriate 303-14 Electronic Engine Controls section.
   

1. Connect the battery ground cable.
   For additional information, refer to: Battery Disconnect and Connect (414-01) .