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Nissan Armada 2025-2026 Service and Repair Manual: Oil Pump

Nissan Armada 2025-2026 Service and Repair Manual / Engine / Engine Lubrication System / Oil Pump

Exploded View

Oil pump drive chain Oil pump sprocket Oil pump drive sprocket
Oil pump drive chain tensioner Oil pump assembly O-ring
Oil pump seal O-ring Oil strainer
Comply with the installation procedure when tightening. Refer to Removal and Installation        
: Engine front
: Always replace after every disassembly.
: N·m (kg-m, ft-lb)
: N·m (kg-m, in-lb)
: Should be lubricated with oil.

Removal and Installation

REMOVAL

Remove the following parts:

  • VTC. Refer to Removal & Installation.

  • Front cover. Refer to Removal & Installation.

  • Timing chain. Refer to Removal and Installation.

  • Oil pan (lower). Refer to Removal and Installation.

  • Oil pan (upper). Refer to Disassembly and Assembly.

Remove oil strainer mounting bolt and remove the oil strainer .

Remove oil pump drive related parts with the following procedure.Remove oil pump drive chain tensioner .

If necessary, hold the tip of the oil pump shaft with a Torx socket (commercial service tool) and loosen and remove the oil pump drive sprocket nut .

Remove oil pump drive chain and the oil pump sprocket as a set.

Loosen oil pump mounting bolts in the reverse order of the figure and remove the oil pump.

INSTALLATION

CAUTION:

  • Check that oil pump chain is correctly install on the oil pump sprocket.

  • Before crank the engine, rotate crankshaft by hand to be sure that oil pump chain is correctly.

  • Do not reuse O-ring.

Tighten mounting bolts of the oil pump assembly to the specified torque in the order shown in the figure.

: 28.0 N·m (2.9 kg-m, 21 ft-lb)

Install oil strainer.

Install the oil pump drive related parts with the following procedure:Install oil pump drive chain and the oil pump sprocket as a set.

NOTE:

  • There is no matching mark in the oil pump drive related parts.

  • Oil pump drive chain cannot be installed after installing the oil pump sprocket.

Hold the tip of the oil pump shaft with a Torx socket (commercially available service tool) and tighten the oil pump sprocket nut to the specified torque.

: 28.0 N·m (2.9 kg-m, 21 ft-lb)

Tighten the chain tensioner mounting bolt to the specified torque and install the oil pump drive chain tensioner .

: 16.7 N·m (1.7 kg-m, 12 ft-lb)

  • Check that the tension is applied to the oil pump drive chain after installing.

Install the following in the reverse order of removal.

Inspection

INSPECTION AFTER INSTALLATION

Check the engine oil level. Refer to Inspection.

Start the engine, and check there is no leakage of engine oil.

Stop the engine and wait for 10 minutes.

Check the engine oil level and adjust the level. Refer to Inspection.

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