ENGINE TESTS, INSPECTIONS, AND ADJUSTMENTS - CONTINUED
ENGINE OIL PRESSURE TEST - CONTINUED
Measuring Engine Oil Pressure - Continued
N OT E
Engine oil pressure to the camshaft and main bearings should be checked on each side of the cylinder block
at oil gallery plug.
Start the engine. Run the engine with SAE 15W40 oil (TM 5-3805-291-10).
Record the value of the engine oil pressure when the engine is at operating temperature 212°F (100°C).
N OT E
The minimum engine oil pressure at 1800 rpm should be approximately 40 to 59 psi (275 to 414 kPa).
Minimum engine oil pressure at low idle rpm (600 to 800 rpm) should be approximately 10 psi (68
An engine oil pressure indicator that has a defect or an engine oil pressure sensor that has a defect can
give a false indication of a low oil pressure or a high oil pressure. If there is a notable difference
between the engine oil pressure readings, make necessary repairs.
Install internal combustion engine test IAW the instructions provided with the tool. Record oil pressure.
Compare the recorded engine oil pressure with the oil pressure indicators on messenger (TM 5-3805-291-10) and the
engine oil pressure that is displayed on MSD.
If low engine oil pressure is determined, refer to Reasons for Low Engine Oil Pressure in this work package.
If high engine oil pressure is determined, refer to Reasons for High Engine Oil Pressure in this work package.
Reasons for Low Engine Oil Pressure
If engine oil level is low, refer to step 8.
If engine oil is contaminated, refer to step 9.
If engine oil bypass valves are open, refer to step 10.
If engine lubrication system is open, refer to step 11.