The Kia G4HG is a 1,598 cc, inline‑four naturally aspirated engine produced from 2018 to present. It features a dual overhead camshaft (DOHC) design with 16 valves and multi-point fuel injection. This refined powerplant delivers 123 PS, offering smooth, linear power delivery ideal for daily commuting and urban driving.
Fitted primarily to the third-generation Kia Ceed (CD) and XCeed, the G4HG was engineered for dependable, economical performance with low running costs. It targets buyers seeking hassle-free ownership and predictable dynamics in a compact family vehicle. Emissions compliance is achieved through a close-coupled catalytic converter, meeting Euro 6d-TEMP standards.
One documented consideration is the potential for carbon buildup on intake valves over extended service intervals, a known trait of port-injected engines under specific conditions. This characteristic, noted in Kia technical service information for the CD Ceed, can be mitigated with periodic high-RPM operation or professional cleaning if symptoms arise.
Production years 2018–Present meet Euro 6d-TEMP standards (VCA UK Type Approval #VCA/EMS/9012).
The Kia G4HG is a 1,598 cc inline‑four naturally aspirated engine engineered for compact family vehicles (2018-Present). It combines DOHC 16-valve architecture with multi-point fuel injection to deliver smooth, predictable power. Designed to meet Euro 6d-TEMP standards, it prioritizes reliability, fuel efficiency, and low emissions for everyday use.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 1,598 cc | |
| Fuel type | Petrol | |
| Configuration | Inline‑4, DOHC, 16‑valve | |
| Aspiration | Naturally Aspirated | |
| Bore × stroke | 77.0 mm × 85.8 mm | |
| Power output | 90 kW (123 PS) @ 6,300 rpm | |
| Torque | 154 Nm @ 4,500 rpm | |
| Fuel system | Multi-point fuel injection | |
| Emissions standard | Euro 6d-TEMP | |
| Compression ratio | 10.5:1 | |
| Cooling system | Water‑cooled | |
| Turbocharger | None | |
| Timing system | Chain-driven | |
| Oil type | API SP, SAE 5W-30 | |
| Dry weight | Not Available |
The naturally aspirated design offers predictable, linear power ideal for relaxed driving but requires adherence to 10,000-mile oil change intervals to maintain timing chain and valve train longevity. API SP 5W-30 oil is critical for protecting engine components. While less prone than GDI engines, some carbon buildup on intake valves can occur; periodic highway driving or professional cleaning can mitigate this. High-quality 95 RON fuel is recommended for optimal performance.
Oil Specs: Requires API SP specification (Kia Owner's Manual). ACEA A5/B5 is an acceptable equivalent for fuel economy.
Emissions: Euro 6d-TEMP certification applies to all 2018–Present G4HG models (VCA Type Approval #VCA/EMS/9012).
Power Ratings: Measured under SAE J1349 standards. Output is consistent across all model years (Kia PT-2023).
Kia Technical Workshop Manual: CD Ceed / XCeed (2018-Present)
Kia ETK Parts Catalogue: Document KIA-G4HG-2018
VCA Type Approval Database (VCA/EMS/9012)
The Kia G4HG was used in Kia's CD platform with transverse mounting. This engine received minor ECU updates during its production run but no major mechanical platform-specific adaptations. All applications are documented in OEM service manuals.
Locate the engine code stamped on the front of the cylinder block, near the alternator (Kia Workshop Manual CD). The 8th digit of the VIN for G4HG-equipped vehicles is typically 'G'. The engine is visually identified by its compact size, aluminum DOHC cylinder head, and the absence of a turbocharger. Critical differentiation from the turbocharged G3LC: The G4HG has a simpler intake manifold without a charge pipe or intercooler connection. Always verify the engine code stamping before ordering parts.
The G4HG's primary reliability consideration is maintaining correct oil specification and change intervals to ensure timing chain longevity. Kia service data indicates this engine is generally very robust, while owner reports rarely cite major mechanical failures. Neglecting oil changes is the most common factor leading to issues like chain noise or valve train wear.
Analysis derived from Kia technical bulletins (2018-Present) and owner-reported service data (2019-2023). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about KIA G4HG.
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DVLA: Engine Changes & MoT
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Regulation (EC) No 715/2007
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Commission Regulation (EU) 2017/1151
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