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 sender screw port.
3. Run the engine until normal operating temperature is reached.
4. Run the engine at 1,000 rpm and 3,000 rpm and record the gauge readings.
5. The oil pressure should be:
At 2,000 rpm, 240-450 kPa (35-65 psi).
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. Clogged oil strainer.
e. Excessive main bearing clearance.
f. Excessive connecting rod clearance.