Engine Oil Pressure: Testing and Inspection

OIL PRESSURE INSPECTION [MZI-3.7]

WARNING:
- Hot engines and engine oil can cause severe burns. Turn off the engine and wait until it and the engine oil have cooled.
- Continuous exposure to USED engine oil has caused skin cancer in laboratory mice. Protect your skin by washing with soap and water immediately after working with engine oil.

1. Disconnect the negative battery cable.

2. Remove the engine cover. Service and Repair

3. Remove the oil pressure switch.
NOTE:
- This inspection can be performed using a combination of SSTs 49 0187 280A (oil pressure gauge), 49 T018 006 (hose) and 49 T018 007 (adapter), or using the following combination of the SSTs.

- 49 D019 908 (gauge), 49 D019 909 (hose), 49 D019 910 (adapter), 49 D019 911 (adapter), and 49 D019 914 (adapter)

4. Screw the SSTs into the oil pressure switch installation hole.






5. Connect the negative battery cable.

6. Warm up the engine to normal operating temperature.

7. Run the engine at the specified speed, and note the gauge readings.

- If not within the specification, inspect for the cause and repair or replace if necessary.

NOTE:
- The oil pressure can vary with oil viscosity and temperature.

Oil pressure (reference value) [oil temperature: 93.3 °C {200 °F}]
- 310-621 kPa {3.17-6.33 kgf/cm2, 45.0-90.0 psi} [2,000 rpm]

8. Stop the engine and wait until it is cool.

9. Disconnect the negative battery cable.

10. Remove the SSTs.

CAUTION:
- Be sure there is no sealant adhering to the first two threads from the end of the oil pressure switch to prevent a possible operation malfunction.

11. Apply silicone sealant to the oil pressure switch threads as shown in the figure.






12. Install the oil pressure switch.

Tightening torque
- 11-18 Nm {113-183 kgf-cm, 98-159 in-lbf}

13. Connect the negative battery cable.

14. Start the engine and confirm that there is no oil leakage.

- If there is oil leakage, repair or replace the applicable part.

15. Install the engine cover. Service and Repair