Engine Oil Pressure: Testing and Inspection

Oil Pressure Test Procedure

NOTE: If the oil pressure warning light stays on with the engine running, check the engine oil level. If the oil level is correct:

1. Connect a tachometer.
2. Remove the engine oil pressure switch and install an oil pressure gauge.
3. Start the engine. Shut it off immediately if the gauge registers no oil pressure. Repair the problem before continuing.
4. Allow the engine to reach operating temperature (fan comes on at least twice). The pressure should be:
- Engine Oil Temperature: 176°F (180°C).
- Engine Oil Pressure:
- At Idle: 70 kPa (10 psi) minimum
- At 3,000 rpm: 490 kPa ( 71 psi) minimum

NOTE: If oil pressure is NOT within specifications, inspect the oil pump.