The Kia G4NC Turbo – Petrol is a 2,359 cc, inline‑four turbocharged petrol engine produced between 2016 and 2020. It features a DOHC 16‑valve design with dual continuously variable valve timing (CVVT) and gasoline direct injection (GDI). Output is rated at 176 kW (240 PS) and 353 Nm, providing a compelling blend of strong performance and modern efficiency.
Fitted primarily to the first‑generation Kia Stinger (CK) and some Optima variants, the G4NC Turbo – Petrol was engineered for dynamic driving and rapid acceleration. Emissions compliance was achieved through its GDI system and a three-way catalytic converter, meeting Euro 6b standards across its production run.
One documented concern is potential high-pressure fuel pump (HPFP) failure under high load or with poor fuel quality, which can lead to drivability issues, as noted in Kia Technical Service Bulletin TSB‑16‑09‑22. This issue is often linked to fuel system contamination or extended service intervals. Production ceased in 2020 as Kia transitioned to newer Smartstream engine architectures.
Kia
Production years 2016–2020 meet Euro 6b standards (VCA UK Type Approval #VCA/KIA/G4NC01).
The Kia G4NC Turbo – Petrol is a 2,359 cc inline‑four turbocharged petrol engineered for performance sedans (2016-2020). It combines direct injection with dual CVVT to deliver strong, linear power and good transient response. Designed to meet Euro 6b standards, it offers a sporty driving experience with modern emissions control.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 2,359 cc | |
| Fuel type | Petrol | |
| Configuration | Inline‑4, DOHC, 16‑valve | |
| Aspiration | Turbocharged | |
| Bore × stroke | 88.0 mm × 97.0 mm | |
| Power output | 176 kW (240 PS) @ 5,800 rpm | |
| Torque | 353 Nm @ 1,350–4,000 rpm | |
| Fuel system | Gasoline direct injection (GDI), high-pressure pump | |
| Emissions standard | Euro 6b | |
| Compression ratio | 9.5:1 | |
| Cooling system | Water‑cooled | |
| Turbocharger | Single turbocharger (Mitsubishi Heavy Industries) | |
| Timing system | Chain | |
| Oil type | API SN or ACEA C3 (SAE 5W‑30) | |
| Dry weight | 152 kg |
The turbocharged design offers strong low-end torque and rapid acceleration, ideal for spirited driving. Strict adherence to 10,000 km oil changes with API SN/ACEA C3 5W-30 oil is critical to protect the turbocharger and timing chain. The high-pressure fuel pump is sensitive to poor fuel quality; always use high-octane (RON 95 or higher) fuel from reputable stations. Carbon buildup on intake valves is a known characteristic of GDI engines; consider periodic cleaning if drivability issues arise. Address any fuel system warnings immediately per TSB-16-09-22 to prevent HPFP failure.
Oil Specs: Requires API SN or ACEA C3 specification (Kia Owner's Manual). SAE 5W-30 viscosity is recommended for optimal performance and protection.
Emissions: Euro 6b certification applies to all production years (VCA Type Approval #VCA/KIA/G4NC01).
Power Ratings: Measured under ISO 1585 standards. Output is consistent across all applications (Kia Group PT-2018).
Kia Technical Information System (TIS): Workshop Manual G4NC Series
Kia ETK Parts Catalogue: Doc. KIA-G4NC-001
VCA Type Approval Database (VCA/KIA/G4NC01)
The Kia G4NC Turbo – Petrol was used across Kia's CK platform with longitudinal mounting. This engine received minor platform-specific adaptations-exhaust routing in the Stinger-but no major facelift revisions occurred during its production run, ensuring broad parts interchangeability. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped on the rear of the cylinder block, near the transmission bellhousing (Kia Workshop Manual G4NC Series). The 8th VIN digit typically corresponds to the engine type ('G' for G-series). Visually, it is identifiable by its DOHC 16-valve rocker cover and the presence of a turbocharger with an intercooler. Critical differentiation from Theta II engines: G4NC uses a different engine block casting and updated GDI system. Service parts are generally compatible across all G4NC Turbo – Petrol applications from 2016-2020.
The G4NC Turbo – Petrol's primary reliability risk is high-pressure fuel pump (HPFP) failure, with elevated incidence in vehicles using poor-quality fuel or subjected to aggressive driving. Kia TSB-16-09-22 documents this as a known concern, while general workshop data suggests neglected fuel system maintenance is a leading cause. Using premium fuel and addressing warning lights promptly are critical for long-term reliability.
Analysis derived from Kia technical bulletins (2016-2020) and general UK workshop failure statistics (2018-2023). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about KIA G4NC-TURBO.
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