New Hyundai/Kia 2.4L G4KJ Engine Long Block
As a leading manufacturer specializing in Hyundai and Kia engine assemblies, WideEngine present our premium G4KJ long block – a complete, brand-new 2.4L direct-injection powerhouse built to restore original performance in mid-size SUVs and sedans.
Engineered with modern precision machining and rigorous hot testing before shipment, this unit delivers reliable power, better efficiency, and long-term durability at a fraction of OEM dealer costs. Worldwide export-ready with secure wooden crate packaging and flexible MOQ.
Key Features Include:
- Complete pre-assembled long block design: Includes the core rotating and valvetrain assembly ready for accessory transfer and installation.
- Brand-new, zero-mileage condition: All components are factory-fresh, eliminating wear from prior use or reman processes.
- Precision-machined aluminum block and cylinder head: Lightweight construction with integrated balancer shafts for reduced vibration and smooth operation.
- Hot tested before delivery: Rigorous run-in testing checks for leaks, compression consistency, oil pressure, and overall function.
- OEM-standard tolerances: Matches original specifications for fit, performance, and durability in GDI applications.
Why Choose This G4KJ-Specific Long Block
Our G4KJ addresses the well-known Theta II vulnerabilities head-on. Many owners face premature failures from manufacturing debris causing bearing wear, oil starvation, and eventual seizure – often leading to knocking noises, power loss, or worse. This brand-new replacement uses fresh, clean components with tight tolerances, eliminating those early-production flaws.
Expect restored acceleration, reduced oil consumption risks, and preserved fuel economy when maintained properly (use 5W-20/5W-30 synthetic, change every 5,000–7,500 miles). Backed by 12-month warranty, 100% hot-tested quality, and high-volume production (up to 5,000 units/month) for consistent supply.
G4KJ Engine Specifications
| Specification | Details |
|---|---|
| Engine Code | G4KJ (Theta II 2.4L GDI) |
| Displacement | 2.4L (2359 cc) |
| Configuration | Inline-4, DOHC 16-valve, Dual CVVT |
| Fuel System | Gasoline Direct Injection (GDI) |
| Compression Ratio | 11.3:1 |
| Bore × Stroke | 88 mm × 97 mm |
| Power Output (typical) | 185–201 hp (138–150 kW) @ 6,000–6,300 rpm |
| Torque | 178–250 Nm (131–184 lb-ft) @ 4,000 rpm |
| Block/Head Material | Aluminum with balancing shafts |
| Valvetrain | Chain-driven |
| Production Era | 2010s (primarily 2011–2019 models) |
Ready to Upgrade? Order Your G4KJ Long Block Today!
As a leading China supplier, WideEngine offers factory-direct pricing, worldwide export shipping, and dedicated support for global customers. In stock and ready for fast dispatch – perfect for repairs, rebuilds, or bulk orders. Don’t settle for risky used engines – choose proven new quality!
Vehicle Compatibility and Fitment Guide
This G4KJ long block fits key Hyundai and Kia models equipped with the 2.4L Theta II GDI engine (always verify VIN and engine code):
- Hyundai Sonata (2011–2019, especially 2011–2015 YF/LF)
- Hyundai Santa Fe / Santa Fe Sport (2013–2018)
- Hyundai Tucson / ix35 (2010–2018 select markets)
- Hyundai Grandeur / Azera (2011–2019)
- Kia Optima / K5 (2011–2018)
- Kia Sorento (2011–2019 select)
- Kia Sportage (2011–2018 select)
WideEngine Factory and G4KJ Long Block Packaging
What's Included in This G4KJ Long Block Assembly
- Cylinder block (aluminum with integrated features)
- Cylinder head (loaded with valves, springs, camshafts, and seals)
- Crankshaft (balanced and installed)
- Pistons, piston rings, and wrist pins
- Connecting rods and bearings
- Timing chain, tensioner, guides, and sprockets
- Internal oil pump and related components
- Pre-timed valvetrain assembly
Typical Exclusions (Standard for Long Blocks)
- External manifolds (intake, exhaust)
- Fuel system components (injectors, rail, high-pressure pump)
- Throttle body, sensors, and wiring harness
- Oil pan, timing cover, or external brackets
- Accessory drive parts (alternator, power steering pump)
- External gaskets, seals, fluids, or mounts (optional add-on kits available)
G4KJ Engine Long Block Supplier and Trade Essentials
| Supplier | WideEngine |
| Quality | Hot Tested Before Delivery |
| MOQ | 1 |
| Production Capacity | 5,000 pieces/month |
| Transport Package | Wooden Case |
| Warranty | 12 months |
| Manufacturing Standard | OEM Standard |
| Condition | Brand New |
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