Oil Pressure Test

1. Disconnect and remove the oil pressure sensor from the engine.
2. Connect an Engine Oil Pressure Gauge 303-088 (T73L-6600-A) and Transmission Pressure Test Kit 307-D003 (D87C-77000-A) or equivalent to the oil pressure sender oil galley port.
3. Run the engine until normal operating temperature is reached.
4. Run the engine at 3,000 rpm and record the gauge reading.
5. The oil pressure should be:
- 276-414 kPa (40-60 psi) at 3,000 rpm

6. If the pressure is not within specification, check the following possible sources:
a. insufficient oil
b. oil leakage
c. worn or damaged oil pump
d. oil pump screen cover and tube
e. excessive main bearing clearance
f. excessive connecting rod bearing clearance
g. excessive camshaft bearing clearance