Low or No Oil Pressure
WARNING: This page is about a different car, the 2006 Pontiac Montana SV6, 2006 Chevrolet Uplander, and 2006 Buick Terraza. However, it is still accessible from the selected car via links, so may be relevant.
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 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.