Brand New G4KH 2.0L Turbo Petrol Engine for Hyundai i30 2018-2023

About this engine

The Hyundai i30 range between 2018 and 2023 included something the badge had never offered before: a serious performance variant built around the G4KH 2.0-litre turbo petrol engine. These are cars people buy to drive hard, and hard-driven engines live shorter lives. If yours has succumbed, whether to bearing knock, oil consumption or the after-effects of missed servicing, a brand-new long engine puts the heart back into the car without the risk of somebody else’s second-hand motor.

Each G4KH we sell is newly built to OEM fitment specification, then hot and cold tested before crating. Freight is free anywhere in Australia and parts are covered for 12 months or 50,000 km, whichever comes first. Fitment is never guesswork: we check your VIN against the engine before you pay, free, on 1300 200 320.

The G4KH 2.0 turbo: background and known problems

Hyundai and Kia's Theta II family covers four petrol engines, and the G4KH is the one built for output: a 2.0-litre four-cylinder with direct injection and a turbocharger, sharing its aluminium block-and-head construction, twin-cam sixteen-valve head design and chain-driven timing with the atmo G4KE, G4KJ and G4KG. Over its production life it powered performance-oriented models across both brands, and in the i30 era it became the engine enthusiasts associate with the nameplate.

Forced induction rewards and punishes in equal measure. The G4KH makes its power through boost, which raises cylinder pressures and thermal loads well beyond what the naturally aspirated family members endure. Its turbocharger rides on plain bearings fed by engine oil, so lubricant condition governs the health of both the bottom end and the turbo. An enthusiast-owned example serviced obsessively can be strong; one that lived on stretched oil intervals usually is not.

The family context matters too. Theta II engines carry a globally documented history of connecting-rod bearing wear at higher kilometres, significant enough to have triggered recalls and extended warranty programs in some markets. Combine that with track days, hard launches and tuning, and it becomes clear why worn G4KH engines are common and why a full rebuild, once priced honestly, rarely beats a new long engine on either cost or confidence in the finished result. There is a second advantage to new: this engine holds OEM fitment specification for a straightforward installation, but its internals are upgraded where the factory design had documented weaknesses, with a higher-grade crankshaft, connecting rods, bearings and other strengthened parts.

Fitment for Hyundai i30 2018-2023

This engine suits Hyundai i30 models from 2018 to 2023 that were factory-built with the G4KH 2.0-litre turbo petrol engine. Most i30s of this period run smaller engines, so this listing applies specifically to the turbocharged performance variants of the range. If you are unsure which engine your car carries, do not guess from the bodykit; modified standard cars wearing performance styling exist, and the VIN is the only evidence that counts when an engine order is on the line.

The check is free. Read the 17-character VIN from your registration paperwork or the windscreen plate, pass it to us by phone on 1300 200 320 or by email, and we will confirm whether this engine matches your build before any payment is taken. It is a small step that guarantees the crate arriving at your workshop contains the right engine for the car sitting on the hoist.

For installation, everything external transfers: turbocharger, manifolds, injection hardware, coils, accessories, mounts and loom. On a performance car, insist your workshop goes further than a basic swap. The turbo needs a shaft-play and seal inspection, oil feed and return lines should be renewed, the intercooler and pipework checked for oil accumulation, and the cooling system pressure-tested with a new thermostat fitted. If the car has been tuned, tell your installer and tell us; a fresh engine deserves a known baseline state of tune before it sees boost, and an honest conversation up front avoids arguments later.

What is supplied and what happens next

You are buying a complete brand-new long engine: new block assembled with crankshaft, pistons, rings, rods and bearings, and a new cylinder head carrying camshafts and the full valvetrain, put together and torqued to OEM fitment specification. The turbocharger, manifolds, injectors and accessories are not included; they transfer from the engine coming out of your i30.

Before crating, the engine is hot and cold tested, with oil pressure, compression and running noise verified at temperature and from a cold start. A heat tab is fitted during assembly and acts as a permanent overheating record. Warranty does not cover overheating damage, which on a turbocharged engine is one more argument for meticulous cooling-system work during the installation.

Parts warranty runs 12 months or 50,000 km, whichever comes first, and requires a qualified mechanic to perform the installation. Freight is included to any Australian address. After the VIN check and payment, the engine ships crated to your nominated workshop; installation, oil-system priming, a careful first start and a restrained run-in follow. Keep boost low and revs moderate for the early kilometres and change the oil early, and the engine's bearings and rings will reward the patience for years afterwards. We are on 1300 200 320 throughout the process for you and your workshop.