Featuring an exact 2488cc displacement, this Infiniti QX60 QR25DE Remanufactured Engine features casting 3KY metallurgy and a specialized 3-solenoid Dual VVT timing cover. Machinists line-hone the aluminum crankcase and micro-polish crankshaft journals. Technicians must conduct complete cooling system vacuum bleeding and execute an exact 500-mile break-in oil change to protect the hybrid supercharged valvetrain from debris.

Engineered with open-deck aluminum block casting 3KY marked QR25, this engine block features cast iron cylinder liners align-honed for crankshaft centerline concentricity. The rotating foundation pairs a micro-polished forged steel crankshaft casting 3TA with balanced forged connecting rods and reinforced hypereutectic pistons. Cylinder head casting 3KY houses camshafts stamped ID on intake and EE on exhaust. Net weight measures 240 lbs within crated dimensions of 38in length by 38in width by 38in height. Sump capacity totals 4.9 quarts.

Key Features of Infiniti QR25DE

Hybrid vehicle repair specialists buy Infiniti QR25DE remanufactured engine long blocks to resolve balance shaft wear and restore factory electric-assist propulsion. This long block replacement provides verified machine shop tolerances for luxury crossover sport utility platforms.

- Front timing cover features 3 dedicated variable timing solenoids bench tested for rapid hydraulic response.
- Cylinder head casting 3KY receives CNC multi-angle valve seat cutting to maintain 0.001in runout.
- Camshafts marked ID and EE provide precise valve timing for hybrid supercharged combustion cycles.
- Crankshaft casting 3TA journals receive micro-polishing to hold total indicator runout under 0.0003in TIR.
- Diamond plateau honed cylinder walls establish an Ra 16 micro-inch finish for piston ring seating.
- Align-honed main bearing saddles maintain roundness to prevent crankshaft binding under heavy hybrid torque.
- Multi-layer steel head gaskets ensure combustion chamber seal integrity under elevated cylinder boost pressures.

Dyno Bench Clearance Machining Specifications

Dyno cell testing validates internal oil gallery pressurization and power output prior to crate packaging. The 2.5L 2488cc DOHC engine produces 250 HP and 243 ft-lbs of shaft torque when combined with the factory supercharger setup. Main journal oil clearance holds between 0.0011in and 0.0015in, while connecting rod clearance measures 0.0012in. Individual cylinder compression gauges verify 175 PSI across all 4 cylinders. Hot engine oil pressure maintains 55 PSI at 3,000 RPM with regulated coolant temperatures steady at 190°F.

Vehicle Fitment Drivetrain Guide

This engine fits 2014 to 2017 Infiniti QX60 Hybrid, 2014 to 2015 Nissan Pathfinder Hybrid, and 2016 Nissan Murano Hybrid models equipped with the 2.5L 2488cc QR25DE engine, head casting 3KY, and 3-solenoid timing cover. Drivetrains include front-wheel drive and all-wheel drive paired with hybrid CVT transmissions. Explicit fitment exclusions ban motorhome use, standard non-turbo Altima sedans, or Rogue crossovers due to distinct timing covers, balance shafts, and supercharger intake mountings.

Installation Protocol Service Requirements

Technicians must transfer the external supercharger assembly, prime the hybrid electric water pump, and bleed inverter cooling passages during installation. Operating warnings explicitly ban installation in motorhomes, commercial delivery vans exceeding gross axle ratings, or non-hybrid non-turbo chassis lacking hybrid computer networks.

- Pre-fill the spin-on oil filter and prime engine lubrication passages with 0W-20 synthetic motor oil.
- Drain initial break-in oil and install a replacement oil filter at the 500-mile service point.
- Check all 3 timing cover solenoid electrical harness connectors and inspect supercharger belt tension at 1,500 miles.

Warranty Terms Core Return Policy

Our remanufactured long block comes backed by a standard 3-Year Unlimited-Mile warranty for reliable road service. We provide free prepaid return freight shipping for your depleted rebuildable core within 30 days of arrival. The crate includes the remanufactured long block, complete timing drive, oil pan, and valve cover.