Engine Oil Pressure: Testing and Inspection

^ Low oil level. Fill to full mark on oil level indicator.
^ Incorrect or malfunctioning oil pressure switch
^ Incorrect or malfunctioning oil pressure gauge
^ Improper oil viscosity for the expected temperature
^ Oil pump worn or dirty
^ Malfunctioning oil pump pressure regulator valve
^ Plugged oil filter
^ Oil pump screen loose plugged, or damaged
^ Excessive bearing clearance. Replace as necessary.
^ Cracked, porous or restricted oil galleries. Repair or replace block.
^ Oil gallery plugs missing or incorrectly installed. Install plugs or repair as necessary.
^ Oil diluted by moisture or unburned fuel