Oil Pressure Check

WARNING: This page is about a different car, the 2005 Infiniti FX45. However, it is still accessible from the selected car via links, so may be relevant.

WARNING:

Be careful not to burn yourself, as engine oil may be hot.
Oil pressure check should be done in "Parking position".

Check the engine oil level. Refer to "ENGINE OIL LEVEL ".
Remove front engine undercover with power tool.
Disconnect harness connector at oil pressure switch, and remove oil pressure switch using deep socket (commercial service tool).
CAUTION: Do not drop or shock oil pressure switch.

Fig 1: Disconnecting Harness Connector At Oil Pressure Switch
Courtesy of NISSAN MOTOR CO., U.S.A.
Install oil pressure gauge and hose (SST).

Fig 2: Identifying Oil Pressure Gauge
Courtesy of NISSAN MOTOR CO., U.S.A.
Start engine and warm it up to normal operating temperature.

Check the engine oil pressure with engine running under no-load.

NOTE: When engine oil temperature is low, engine oil pressure becomes high.

Engine oil pressure [Engine oil temperature at 80°C (176°F)]

ENGINE OIL PRESSURE SPECIFICATION

Engine speed rpm	Approximate discharge pressure kPa (kg/cm² , psi)
Idle speed	More than 98 (1.0, 14)
2,000	More than 294 (3.0,43)

If difference is extreme, check oil passage and oil pump for oil leaks.

After the inspections, install oil pressure switch as follows:
1. Remove old liquid gasket adhering to oil presser switch and engine.
2. Apply liquid gasket and tighten oil pressure switch to the specification.
  Use Genuine RTV Silicone Sealant or equivalent. Refer to "RECOMMENDED CHEMICAL PRODUCTS AND SEALANTS ".
  1. : 14.8 N.m (1.5 kg-m, 11 ft-lb)
3. After warming up engine, make sure there is no leakage of engine oil with running engine.