Hyundai Sonata Santa Fe Tucson Kia Optima Sorento Sportage G4KJ 2.4L L4 Engine 2013-2016

Description

Eliminate catastrophic connecting rod bearing failure by installing this remanufactured Hyundai Kia G4KJ 2.4L Remanufactured Engine. CNC line boring aligns the crankshaft saddle bore axis across block casting G4KJ. This 2.4L 4-Cylinder 16-Valve DOHC direct-injection long block mandates an initial 500-mile break-in oil change to clear microscopic debris from high-pressure direct-injection pump drive journals.

High-pressure die-cast aluminum block casting G4KJ features cast iron cylinder sleeves and an align-honed main tunnel. A forged steel crankshaft spins on upgraded tri-metal rod bearings clearanced to 0.0013in to prevent journal seizure. Aluminum cylinder head casting THETA-2 G K# houses direct-injection fuel ports, sixteen valves, and dual variable valve timing cams. The crated unit registers 250 lbs, crated envelope dimensions of 36in length by 36in width by 36in height, with a 5.0 quarts oil capacity.

Key Features of Hyundai Kia G4KJ

Commercial repair facilities buy Hyundai Kia G4KJ remanufactured engine assemblies to restore fleet reliability and eliminate connecting rod knock. Service centers choose this remanufactured 2.4L long block replacement to solve Theta-2 oil consumption.

• Aluminum block casting G4KJ receives precision CNC deck resurfacing to secure high-pressure direct-injection cylinder head seals.
• Forged steel crankshaft journals receive diamond micro-polishing down to 0.0003in runout to eliminate rotating journal hotspots.
• Cylinder head casting THETA-2 G K# features CNC valve seat cutting to maintain 0.001in valve seat runout.
• Upgraded tri-metal rod bearings maintain 0.0013in oil clearance to protect crankshaft pins from metal-to-metal contact.
• Diamond plateau cylinder honing produces a crosshatch pattern that seats moly piston rings within 500 miles.
• Dual variable valve timing camshafts undergo laser profile scanning to ensure exact cam lobe lift and duration.
• Replaced brass oil gallery plugs provide a leak-proof oil supply to the high-pressure fuel pump lobe.

Dyno Load Precision Machining Tolerances

Dynamometer load testing validates 185 HP at 6,000 RPM alongside 178 ft-lbs shaft torque at 4,000 RPM on our computer cell. Technicians verify crankshaft journal runout below 0.0003in TIR while rod bearing oil clearance gauges at 0.0013in. Diamond plateau cylinder honing controls piston-to-cylinder clearance to 0.0012in to prevent cold piston scuffing. Hot oil pressure maintains 65 PSI at 3,000 RPM with engine coolant regulated at 195°F. Compression testing confirms balanced readings between 190 PSI and 195 PSI across all four cylinders.

Vehicle Fitment Drivetrain Guide

This remanufactured engine fits 2013 to 2016 Hyundai Sonata, 2013 to 2016 Hyundai Santa Fe Sport, 2014 to 2016 Hyundai Tucson, 2013 to 2016 Kia Optima, 2014 to 2016 Kia Sorento, and 2014 to 2016 Kia Sportage models equipped with the 2.4L 2359cc GDI G4KJ engine. It pairs with 6-Speed Automatic front-wheel-drive or all-wheel-drive transaxles. This long block does not fit 2.0L Turbo G4KH models, multipoint injected MPI engines, or hybrid powertrain chassis.

Installation Protocol Service Requirements

Inspect electronic throttle body harness pins and engine motor mounts before lowering the long block into the vehicle cradle. Never operate this direct-injected GDI engine in stripped sand buggies or aftermarket forced-induction track builds without auxiliary high-flow oil filtration. Technicians must clean high-pressure direct-injection rail lines before ignition.

• Pressure-prime the internal oil galleries with clean synthetic oil before starter engagement to protect new rod bearings.
• Drain the factory break-in oil and install a genuine oil filter at 500 miles to remove metal particles.
• Inspect the primary timing chain tensioner and verify direct-injection fuel pressures at the 3,000 miles service.

Warranty Terms Core Return Policy

We protect your investment with a 3-Year Unlimited-Mile warranty covering machine shop assembly and internal mechanical components. Our logistics team provides free prepaid freight return for your old rebuildable core inside a 30-day window. The crate contains the long block core, pre-installed timing components, oil pan, and valve cover.