Oil Pressure Test
- 1.
Disconnect and remove the oil pressure switch from the engine.
- 2.
Connect the engine Oil Pressure Gauge to the oil pressure switch oil galley port.
- 3.
Run the engine until normal operating temperature is reached.
- 4.
Run the engine at the specified rpm and record the gauge reading.
- 5.
The oil pressure should be within specifications; refer to the specification chart in the appropriate engine article.
- 6.
If the pressure is not within specification, check the following possible sources:
- Oil pump screen cover and tube
- Excessive main bearing clearance
- Excessive connecting rod bearing clearance
- Piston squirter stuck open
- Oil pump relief valve stuck open