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 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.