Hyundai H-1 18 (2018-2021) 2018-2021 G4FJ G4FD G4FJ G4FD Complete Cylinder Head 22110-2B755 22110-2B750 Kia Optima K5 – OEM 22110-2B755

Product Overview: This complete cylinder head assembly is built for Hyundai and Kia G4FJ and G4FD 1.6-litre direct-injection petrol engines, including turbocharged T-GDI variants. It is supplied as a fully assembled unit with pre-installed valves, guides and seats and is machined to original equipment tolerances, providing a reliable replacement for a warped, cracked or valve-damaged original cylinder head.

Key Features: The casting is produced from high-grade aluminium alloy and CNC-machined for accurate deck flatness, valve seat concentricity and consistent combustion chamber volume. Valve guides and seats are fitted and honed for even sealing and balanced compression, and the direct-injection injector bores and spark plug threads are precisely machined for correct sealing and combustion. Cam carrier surfaces are finished to maintain correct bearing clearance for the DOHC valvetrain, while reinforcement around the valve bridge improves thermal durability under boost.

Vehicle Compatibility: This head fits Hyundai H-1 18 (2018-2021), i30 17 (2016-2020), i30 16 (2014-2017), iX35 10 (2009-2013), i20 15 (2014-2019) and Accent 15 (2014-2019) models, plus Kia Optima and K5 applications using the G4FJ or G4FD engine. Confirm the engine code and OE reference before ordering.

Specifications: Engine code G4FJ / G4FD; displacement 1.6 litres; inline four-cylinder direct-injection petrol, turbocharged in G4FJ form; material aluminium alloy; standard size; new condition; complete assembly; 12-month warranty; purpose replacement and repair.

OEM / Reference Numbers: 22110-2B755, 22110-2B750, 22100-2B702, 22100-2B705, 22100-2B725 and 22111-2B770. Match these references against the casting marks on the original head to confirm the correct variant.

Applications: Suitable for compact hatchbacks, sedans, small SUVs and vans, covering everyday repairs, performance rebuilds, workshop overhauls and fleet maintenance where a factory-specification direct-injection head is required.

Benefits / Replacement Information: Fitting this assembly restores compression, corrects coolant and combustion gas leakage caused by cracks or distortion, and removes the cost of separately reconditioning valves, guides and seats. A complete unit reduces downtime and simplifies the repair.

Installation or Fitment Notes: Installation should be carried out by a qualified technician. Check block deck flatness, fit new head bolts, gaskets and seals, and torque in the manufacturer's specified sequence. Replace timing and cooling components as needed, verify valve clearances, and confirm direct-injection injector sealing. Run the engine to operating temperature and re-check for leaks before road testing.