Low or No Oil Pressure

The following conditions may cause low or no oil pressure:

• Low oil level-Fill to the full mark on the oil level indicator.
• Incorrect or malfunctioning oil pressure switch-Replace the oil pressure switch.
• Incorrect or malfunctioning oil pressure gage-Replace the oil pressure gage.
• Improper oil viscosity or diluted oil
  • Install oil of proper viscosity for expected temperature.
  • Install new oil if the oil is diluted.
• A worn or dirty oil pump-Clean or replace the oil pump.
• A plugged oil filter-Replace the oil filter.
• A loose or plugged oil pickup screen-Replace the oil pickup screen.
• A hole in the oil pickup tube-Replace the oil pickup tube.
• Excessive rod, main, or cam bearing clearance-Replace the bearings.
• Cracked, porous, or plugged oil gallery-Repair or replace the engine block.
• Missing or improperly installed gallery plugs-Install or repair the plugs as needed.
• A stuck pressure regulator valve
  • Inspect the pressure regulator valve for sticking in the bore.
  • Inspect the bore for scoring and burrs.
• A worn or poorly machined camshaft-Replace the camshaft.
• Worn valve guides-Repair the valve guides as needed.