Oil Pressure Inspection

WARNING: This page is about a different car, the 2004 Mazda 3. However, it is still accessible from the selected car via links, so may be relevant.

WARNING:

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.
Hot engines and engine oil can cause severe burns. Turn off the engine and wait until it and the engine oil have cooled.

Remove the battery cover.
Disconnect the negative battery cable.
Remove the under cover.
Remove the oil pressure switch.
Screw the SST into the oil pressure switch installation hole.

Fig 1: Inspecting Oil Pressure
Courtesy of MAZDA MOTORS CORP.
Warm up the engine to normal operating temperature.

NOTE:

The oil pressure can vary with oil viscosity and temperature.

Run the engine at the specified speed, and note the gauge readings.
- If the pressure is not as specified, inspect for the cause and repair or replace if necessary.
Oil Pressure [Oil Temp: 100 °C {212 °F}] (Approx. Quantity) [3,000 RPM]

LF: 234-521 kPa {2.39-5.31 kgf/cm ², 33.9-75.5 psi} min

L3: 395-649 kPa {4.03-6.61 kgf/cm ², 57.3-94.1 psi} min
Stop the engine and wait until it is cool.
Remove the SST .

CAUTION:

Be sure there is no sealant between 1.0-2.0 mm {0.04-0.07 in} from the end of the oil pressure switch to prevent a possible operation malfunction.

Fig 2: Applying Sealant To Oil Pressure Switch

G00962290

Courtesy of MAZDA MOTORS CORP.

Apply silicone sealant to the oil pressure switch threads as shown.
Install the oil pressure switch.
Tightening Torque

12-18 N.m {1.2-1.8 kgf.m, 9-13 ft.lbf}
Install the under cover.
Connect the negative battery cable.
Install the battery cover.
Start the engine and inspect for oil leakage.
- If the oil leaks, specify the malfunctioning part and repair or replace it.