Oil Pump for Infiniti I35 (2002-2004) 3.5L

High-Flow Replacement Oil Pump for 2002-2004 Infiniti I35 (A33)

What it Does: The replacement oil pump delivers consistent hydrodynamic lubrication across the critical journal bearings and valvetrain of the 2002-2004 Infiniti I35 to prevent oil starvation and maintain stable oil pressure throughout the rev range.

The Stock Infiniti I35 Oil Pressure Degradation

High-mileage VQ35DE powerplants in the A33 chassis are prone to internal oil pump rotor wear and pressure relief valve scoring. Over extended thermal cycles, micro-abrasives score the aluminum pump housing and inner trochoid gear faces, causing internal blow-by and cavitation. This wear significantly lowers hot idle line pressure, starving variable valve timing sprockets and rod bearings, which ultimately triggers timing chain rattle, hydraulic lifter tick, and catastrophic bearing seizure under load.

The Engineering Solution

Engineered to exact OEM dimensional tolerances, this direct-fit oil pump assembly restores factory volumetric efficiency and cold-start pressurization. Precision-machined sintered steel drive gears resist cavitation and flank wear under high-RPM shearing stress. The housing incorporates an inspected, pre-set pressure relief valve spring to eliminate pressure spikes and ensure constant line flow across the primary oil galleries, backed by fresh elastomer sealing surfaces to eliminate front crank seal seepage.

What's Included

• 1 Oil Pump Assembly
• 1 O-Ring
• 1 Gasket

Technical Specifications

Compatibility

• 2002 Infiniti I35 3.5L V6 VQ35DE (A33)
• 2003 Infiniti I35 3.5L V6 VQ35DE (A33)
• 2004 Infiniti I35 3.5L V6 VQ35DE (A33)

Frequently Asked Questions & Fitment Warnings

Does this fit the A33 I35?

Yes, this is a direct fit for the 2002-2004 Infiniti I35 equipped with the VQ35DE engine; it does not fit older 3.0L VQ30DE applications.

Do I need to prime the oil pump prior to first startup?

Yes, pre-packing the pump cavities with clean assembly lube or fresh engine oil is mandatory to generate immediate suction and prevent dry gear galling.

The Infiniti Standard

Built to withstand high-output Japanese V6 demands, this oil pump matches strict OE hydrodynamic tolerances to protect your valvetrain and bottom end under hard acceleration.