Oil Pressure Check

WARNING: This page is about a different car, the 2008 Infiniti EX35. However, it is still accessible from the selected car via links, so may be relevant.

WARNING:

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

Check the engine oil level. Refer to INSPECTION .
Remove engine undercover with power tool.
Disconnect harness connector at oil pressure switch, and remove oil pressure switch using deep socket (commercial service tool).
CAUTION: Never drop or shock oil pressure switch.
- 2WD models (A)
  
  Fig 1: Identifying Oil Pressure Switch - 2WD Models
  Courtesy of NISSAN MOTOR CO., U.S.A.
- AWD models (A)
  
  Fig 2: Identifying Oil Pressure Switch - AWD Models
  Courtesy of NISSAN MOTOR CO., U.S.A.
Install the oil pressure gauge [SST: ST25051001 (J25695-1)] (A) and hose [SST: ST25052000 (J25695-2)] (B).

Fig 3: Identifying Oil Pressure Gauge & Hose
Courtesy of NISSAN MOTOR CO., U.S.A.
Start the engine and warm it up to normal operating temperature.
Check the engine oil pressure with engine running under no-load.
NOTE: When the engine oil temperature is low, the engine oil pressure becomes high.

Engine oil pressure: Refer to ENGINE OIL PRESSURE .

If difference is extreme, check engine oil passage and oil pump for engine oil leakage .
After the inspections, install oil pressure switch as follows:
1. Remove old liquid gasket adhering to oil pressure switch and the mating surface.
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 .
  
  2WD models
  
  Tightening torque: Refer to EXPLODED VIEW (2WD) .
  
  AWD models
  
  Tightening torque: Refer to EXPLODED VIEW .
3. After warming up engine, check there is no leakage of engine oil with running engine.