Oil Pressure Diagnosis and Testing. Pontiac Sun Runner - 4WD (Canada) 1998

For 1990-2009 cars

• | Low oil level. Fill to full mark on oil level indicator.

• | Slow idle speed.

• | Incorrect or malfunctioning oil pressure switch.

• | Incorrect or malfunctioning oil pressure indicator.

• | Improper oil viscosity or diluted oil.

| Install oil of the proper viscosity for expected temperature. Install new oil if diluted with moisture or unburned fuel mixture.

• | Oil pump worn or dirty.

• | Plugged oil filter.

• | Oil pickup screen loose or plugged.

• | Hole in oil pick up tube.

• | Excessive bearing clearance. Replace as necessary.

• | Cracked, porous or restricted oil galleries. Repair or replace block.

• | Gallery plugs missing or misinstalled. Install plugs or repair as necessary.

• | Malfunctioning oil pump pressure regulator valve.

• | Camshaft worn or poorly machined. Replace the camshaft.

• | Worn valve guides.