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Hyundai G4NB 1.8L Long Block Engine Assembly
Hyundai G4NB 1.8L Long Block Engine Assembly - Image 2
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Hyundai G4NB 1.8L Long Block Engine Assembly


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Engine CodeG4NB
Displacement1797 cc (1.8 L)
ConfigurationInline 4-Cylinder
ValvetrainDOHC 16V D-CVVT
Fuel SystemMPI (Multi-Point Injection)
Bore Diameter X Stroke Length81 mm x 87.12 mm
Compression Ratio10.3:1
Maximum Power110 kW (148 hp) @ 6500 rpm
Max Torque178 Nm (131 lb-ft) @ 4700 rpm
Block MaterialAluminum Alloy
Cylinder Head MaterialAluminum Alloy
Fuel TypeGasoline (Petrol)
Aspiration TypeNaturally Aspirated
Net Weight115 kg
Package Dimensions80 × 60 × 70 cm

Manufacturer No.

  • G4NB
  • 21101-2EW03

OEM Part No.

  • 21101-2EW03
  • 21101-2E000
  • 21101-2E500

Engine Part No.

  • Hyundai G4NB 1.8L
  • Kia G4NB 1.8L

Interchange No.

  • 21101-2EW03
  • G4NB Long Block
  • Nu 1.8L Long Block

Fitment Vehicles

  • Hyundai Elantra (MD) 2010-2015
  • Hyundai i30 (GD) 2011-2016
  • Hyundai Mistra (CF) 2013-2020
  • Kia Forte (YD) 2013-2016
  • Kia Cerato (YD) 2012-2016
  • Kia Soul (PS) 2014-2016
  • Kia K4 (China) 2014-2019
This long block assembly is engineered to OEM specifications for the Hyundai Nu family G4NB 1.8L naturally aspirated gasoline engine. The assembly comprises the aluminum cylinder block, forged steel crankshaft, aluminum pistons, connecting rods, aluminum cylinder head with dual overhead camshafts, 16-valve D-CVVT valvetrain, oil pan, and valve cover. It excludes intake manifold, exhaust manifold, ignition system, fuel injection system, and ancillary accessories which must be transferred from the original engine. The G4NB features a bore of 81 mm and stroke of 87.12 mm with a compression ratio of 10.3:1. Produced initially at the Ulsan plant from 2010 to 2016, production later shifted to China for the Mistra model. Designed as a direct replacement for worn or damaged cores in compatible Hyundai and Kia platforms.