Engine Lubrication: Testing and Inspection
LEFT CYLINDER HEAD DIAGNOSIS AND TESTING - CHECKINGENGINE OIL PRESSURE
1. Remove the oil pressure switch.
2. Install oil pressure test gauge assembly, Special Tools C-3292 with 8406 adaptor.
3. Start engine and monitor gauge readings.
CAUTION: If oil pressure is 0 at idle, Do Not Run engine at 3000 RPM
4. Oil Pressure (engine at operating temperature):
Curb Idle 34.5 kPa (5 psi) minimum
3000 rpm 300 - 724 kPa (45 - 105 psi)
5. If oil pressure is 0 at idle. Shut off engine, check for pressure relief valve stuck open or a clogged oil pickup screen.
6. Install oil pressure switch after testing is completed.