Checking VVT Oil Pressure

CHECKING VVT OIL PRESSURE

Special Tools:






NOTE: This test can be used to help diagnose VVT faults. Due to restricted access to the oil pressure switch, it is recommended to first perform this procedure to check VVT oil pressure at the oil temperature sensor.






NOTE: Anytime the oil temperature sensor is removed, it should be replaced with a new sensor.

1. Disconnect and remove the oil temperature sensor (1) Oil Temperature Sensor - Removal.






CAUTION: Threads in cylinder head are British Standard Pipe (BSP). Do not install a NPT threaded adapter, this could crack the cylinder head.

2. Install threaded adapter (1).
3. Install an oil pressure gauge (2).





4. Start engine and record reading on oil pressure gauge (1).

CAUTION: If oil pressure is 0 at idle, do not perform the 3000 RPM test

5. If oil pressure is 0 at idle, shut off engine. No oil pressure or low oil pressure at the oil temperature sensor can be due to the following:
- Clogged variable valve timing filter screen
- Pressure relief valve stuck open
- Clogged oil pump pick-up screen





6. To determine if the variable valve timing filter screen is clogged, check engine oil pressure at the oil pressure switch Checking Engine Oil Pressure.
7. If oil pressure is acceptable at the oil pressure switch, but low at the oil temperature sensor, remove the cylinder head (1) and inspect the variable valve timing filter screen (3) Cylinder Head - Removal.





8. After test is complete, remove oil pressure gauge (2) and adapter (1).





9. Install a new oil temperature sensor (1) and connect the electrical connector Oil Temperature Sensor - Installation.