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 gauge

  Replace the oil pressure gauge.

• 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.