Oil Pressure Diagnosis and Testing
WARNING: This page is about a different car, the 2003 GMC Sonoma and 2003 Chevrolet S10 Pickup. However, it is still accessible from the selected car via links, so may be relevant.
- Low oil level. Fill to full mark on oil level indicator.
- Incorrect or malfunctioning oil pressure switch
- Incorrect or malfunctioning oil pressure gauge
- Improper oil viscosity for the expected temperature
- Oil pump worn or dirty
- Malfunctioning oil pump pressure regulator valve
- Plugged oil filter
- Oil pump screen loose plugged, or damaged
- Excessive bearing clearance. Replace as necessary.
- Cracked, porous or restricted oil galleries. Repair or replace block.
- Oil gallery plugs missing or incorrectly installed. Install plugs or repair as necessary.
- Oil diluted by moisture or unburned fuel