Oil Pressure Diagnosis and Testing

Engine Mechanical - 3.0L LM2 Diesel | Diagnostic Information and Procedures | Document ID: 5138961 Special Tools EN-52486 Oil Pressure Gauge Adapter J-21867 Pressure Gauge Equivalent regional tools: Special Tools Procedure

1. Raise and support the vehicle. Lifting and Jacking the Vehicle

Oil Pressure Diagnosis and Testing — figure 1

2. Oil Filter (1) » Remove and DISCARD

Oil Pressure Diagnosis and Testing — figure 2

3. Install the EN-52486 Oil Pressure Gauge Adapter (1).
4. Install the J-21867 Pressure Gauge (2).
5. Lower the vehicle.
6. Start the engine.
7. Check the engine oil pressure. The pressure specifications listed below represent oil temperature measured between 19°C to 126°C (66°F to 259°F). 7.1. At 1000 rpm the desired oil pressure is 152 - 218 kPa (22 - 32 psi) 7.2. At 2500 rpm the desired oil pressure is 177 - 280 kPa (26 - 41 psi) 7.3. At 4000 rpm the desired oil pressure is 320 - 400 kPa (46 - 58 psi) 7.4. The “Oil Pressure Low Turn Vehicle Off” warning message will be displayed on the driver information center when pressures fall below the following values for more than 2  seconds of run time: 35 kPa (5 psi) at 1000 rpm 50 kPa (7.25 psi) at 2500 rpm 160 kPa (23 psi) at 4000 rpm
8. Turn the engine OFF.
9. Raise the vehicle.
10. Remove the J-21867 Pressure Gauge (2).
11. Remove the EN-52486 Oil Pressure Gauge Adapter (1).

Note

Coat the oil filter seal with a thin film of fresh engine oil.

12. Oil Filter (1) » Install and tighten — 3/4 to 1 full turn after gasket makes contact with the sealing surface on the filter mounting flange
13. Lower the vehicle.
14. Check the engine oil level.