Oil Pressure Test

1. Disconnect and remove the oil pressure sensor (9278) from the engine.
2. Connect an Engine Oil Pressure Gauge T73L-6600-A and Transmission Test Adapter D87C-77000-A or equivalent to the oil pressure sensor 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 276-414 kPa (40-60 psi) @ 2500 rpm
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 (6622)
- excessive main bearing clearance
- excessive connecting rod bearing clearance