M35x AWD V6-3.5L (VQ35HR) (2010)
When the engine oil temperature is low, the engine oil pressure becomes high.
Engine oil pressure [Engine oil temperature at 80°C (176°F)]
If difference is extreme, check engine oil passage and oil pump for engine oil leakage.
7. After the inspections, install oil pressure switch as follows:
a. Remove old liquid gasket adhering to oil pressure switch and the mating surface.
b. Apply liquid gasket and tighten oil pressure switch to the specification.
Use Genuine RTV Silicone Sealant or equivalent. See: Specifications/Fluid Type Specifications.
Oil pressure switch: 14.7 Nm (1.5 kg-m, 11 ft-lb)
c. After warming up engine, check there is no leakage of engine oil with running engine.