Nissan Pathfinder: Engine Lubrication System - Lubrication System (System Description). Engine Oil Pressure (Basic Inspection). Service Data and Specifications (SDS)

Nissan Pathfinder (R53) 2022-2026 Service Manual / Engine :: Engine Lubrication System / Lubrication System (System Description). Engine Oil Pressure (Basic Inspection). Service Data and Specifications (SDS)

Lubrication System (System Description)
Engine Oil Pressure (Basic Inspection)
Service Data and Specifications (SDS)

Lubrication System (System Description) Nissan Pathfinder 5th Gen

Lubrication Circuit

1.	Exhaust camshaft (bank 1)	2.	Exhaust camshaft sprocket (bank 1)	3.	Exhaust valve timing control solenoid valve (bank 1)
4.	Filter	5.	Connecting rod bushing	6.	Oil jet
7.	Timing chain tensioner (primary)	8.	Timing chain oil jet	9.	Engine oil pressure sensor
10.	Engine oil temperature sensor	11.	Oil filter	12.	Oil cooler
13.	Oil pump	14.	Engine oil pressure control solenoid valve	15.	Connecting rod bearings
16.	Exhaust valve timing control solenoid valve (bank 2)	17.	Exhaust camshaft sprocket (bank 2)	18.	Main bearings
19.	High pressure fuel pump	20.	Exhaust camshaft (bank 2)	21.	Intake camshaft (bank 2)
22.	Intake camshaft (bank 1)	A.	Main gallery

Engine Lubrication System Schematic

1.	Oil pan	2.	Oil pump	3.	Engine oil pressure control solenoid valve
4.	Oil cooler	5.	Oil filter	6.	Engine oil pressure sensor
7.	Engine oil temperature sensor	8.	Timing chain tensioner (primary)	9.	Exhaust valve timing control solenoid valve
10.	Camshaft sprocket (EXH)	11.	Timing chain oil jet	12.	Timing chain
13.	Main bearing	14.	Crankshaft	15.	Connecting rod bearing
16.	Connecting rod	17.	Piston oil jet	18.	Piston
19.	High pressure fuel pump lifter	20.	Timing chain tensioner (secondary)	A.	Regulator valve
B.	Oil strainer	C.	Relief valve	D.	Main gallery feedback
E.	Relief valve	F.	Main oil gallery	G.	Cylinder bore
H.	Cylinder head oil gallery	J.	Camshaft journal No. 1 (INT)	K.	Camshaft journal No. 2 - 4 (INT)
L.	Camshaft journal No. 1 (EXH)	M.	Camshaft journal No. 2 - 4 (EXH)	N.	Oil injection
P.	To oil pan	Q.	Bypass	R.	Oil passage

Engine Oil Pressure (Basic Inspection) Nissan Pathfinder R53

Inspection

OIL PRESSURE CHECK

WARNING:

Be careful not to burn yourself, as engine oil may be hot.

When checking engine oil pressure, shift position should be "Parking position", and apply parking brake securely.

Check the engine oil level. Refer to Inspection.

Remove front fender protector side cover (RH). Refer to Removal and Installation.

Disconnect the harness connector from the engine oil pressure sensor.

Remove engine oil pressure sensor using suitable tool and install suitable tools (A/B).

CAUTION:

Do not drop or shock engine oil pressure sensor.

Engine oil pressure sensor

: Exploded View

Start the engine and warm it up to normal operating temperature.

Check oil pressure with engine running under no-load, using suitable tool.

NOTE:

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

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

Engine oil pressure

: Oil Pressure

After the inspections, install the engine oil pressure sensor using suitable tool as follows:Remove the old sealant adhering to engine oil pressure sensor and engine. Apply thread sealant and tighten the engine oil pressure sensor to specification.

Use High Performance Thread Sealant, or equivalent. Refer to Recommended Chemical Products and Sealants.

Engine oil pressure sensor

: Exploded View

After warming up engine, make sure there are no engine oil leaks.

Install front fender protector side cover (RH). Refer to Removal and Installation.

Service Data and Specifications (SDS) Nissan Pathfinder

Oil Pressure

Unit: kPa (bar, kg/cm², psi)

Engine speed	Approximate oil pressure during low pressure control	Approximate oil pressure during high pressure control
600 rpm	174 (1.77, 1.74, 25.23)	174 (1.77, 1.74, 25.23)
2,000 rpm	180 (1.8, 1.84, 26.1)	278 (2.78, 2.84, 40.31)
4,000 rpm	180 (1.8, 1.84, 26.1)	360 (3.6, 3.67, 52.2)

*: Engine oil temperature at 80°C (176°F)

Oil Capacity

Unit: (US qt, Imp qt)

Drain and refill	With engine oil filter change	Approximately 4.8 (5-1/8, 4-1/4)
Drain and refill	Without engine oil filter change	Approximately 4.5 (4-3/4, 4)
Dry engine (engine overhaul)		Approximately 5.9 (6-1/4, 5-1/4)