Oil Pressure Test
- Remove the oil pressure switch (1) from the engine block.
- Install a pressure gage in place of the oil pressure switch.
- Start the engine and run at idle until normal operating temperature is reached.
- Raise the engine speed to 4000 RPM and measure the oil pressure.
- If the oil pressure is below specification refer to the Oil Pressure Diagnosis table.
- Stop the engine.
- Remove the pressure gage.
- Install the oil pressure switch.
- Run the engine and inspect for oil leaks from the oil pressure switch.
Normal Oil Pressure
330-430 kPa (47-61 psi) at 4000 RPM
Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.
Tighten
Tighten the oil pressure switch to 14 N·m (10 lb ft).
Problem | Action | ||||||
|---|---|---|---|---|---|---|---|
The oil level is low. | Fill the oil to the FULL mark on the oil level indicator. | ||||||
The idle speed is low or unstable. | Refer to Symptoms - Engine Controls in 1.6L Engine Controls. | ||||||
The oil pressure switch is incorrect or malfunctioning. | Replace the oil pressure switch. | ||||||
The oil pressure indicator is incorrect or malfunctioning. | Replace the oil pressure indicator. | ||||||
The oil viscosity is improper. | Use oil of the proper viscosity for the expected temperature. | ||||||
The oil is diluted with one of the following materials:
| Fill with new oil. | ||||||
The oil pump is worn or dirty. | Replace or clean the oil pump as necessary. | ||||||
The oil filter is plugged. | Replace the oil filter. | ||||||
The oil pickup screen is loose or plugged. | Adjust or replace the screen as necessary. | ||||||
The oil pickup tube has a hole. | Replace the tube. | ||||||
The oil pickup tube O-ring is faulty. | Replace the O-ring. | ||||||
The bearing clearance is excessive. | Replace the bearings as necessary. | ||||||
The oil galleries display one of the following conditions:
| Repair or replace the block as necessary. | ||||||
The gallery plugs or cylinder head oil jet are missing or incorrectly installed. | Install the plugs / oil jet and repair as necessary. | ||||||
The oil pump pressure regulator valve is malfunctioning. | Inspect and replace the valve. | ||||||
The camshaft or cylinder head is worn or poorly machined. | Replace the camshaft and or the cylinder head. | ||||||
The valve guides are worn. | Replace the guides. |
