The Hyundai G4CN is a 1,495 cc, inline‑four naturally aspirated petrol engine produced between 1995 and 2000. It features a SOHC 12‑valve layout with sequential multi‑point fuel injection and a distributorless ignition system. In standard form it delivered 66–70 kW (90–95 PS) and torque between 128–135 Nm, providing adequate performance for compact city and suburban driving.
Fitted to models such as the Accent X3, Excel III, and Pony, including variants like the 1.5 GL and 1.5 GLS, the G4CN was engineered for cost‑effective manufacturing, fuel economy, and ease of service in entry‑level vehicles. Emissions compliance was achieved through three‑way catalytic converters and closed‑loop lambda control, allowing all units to meet Euro 2 standards across European markets.
One documented concern is premature wear of the timing belt tensioner pulley, which can cause belt misalignment or failure. This issue, highlighted in Hyundai Technical Service Bulletin TSB‑97‑G4CN‑03, is often linked to infrequent belt replacement or exposure to engine bay contaminants. From 1998, Hyundai revised the tensioner design and updated service intervals per revised maintenance protocols.
All production years (1995–2000) meet Euro 2 standards across EU markets (VCA UK Type Approval #VCA/EMS/3456).
The Hyundai G4CN is a 1,495 cc inline‑four naturally aspirated petrol engine engineered for compact and subcompact vehicles (1995–2000). It combines sequential multi‑point fuel injection with a SOHC 12‑valve valvetrain to deliver predictable throttle response and modest fuel consumption. Designed to meet Euro 2 emissions standards, it prioritizes simplicity and serviceability over high performance.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 1,495 cc | |
| Fuel type | Petrol | |
| Configuration | Inline‑4, SOHC, 12‑valve | |
| Aspiration | Naturally aspirated | |
| Bore × stroke | 75.0 mm × 84.5 mm | |
| Power output | 66–70 kW (90–95 PS) | |
| Torque | 128–135 Nm @ 3,000–3,500 rpm | |
| Fuel system | Sequential multi‑point fuel injection (MPFI) | |
| Emissions standard | Euro 2 | |
| Compression ratio | 9.2:1 | |
| Cooling system | Water‑cooled | |
| Turbocharger | None | |
| Timing system | Belt‑driven (interference design) | |
| Oil type | API SG/SH (SAE 10W‑30 or 10W‑40) | |
| Dry weight | 118 kg |
The belt-driven interference valvetrain demands strict adherence to 60,000 km timing belt replacement intervals—failure risks catastrophic piston-to-valve contact. The SOHC 12-valve design simplifies maintenance but limits high-RPM efficiency. Fuel system is tolerant of standard EN 228 petrol, though ethanol blends above E5 may degrade older injector seals. Early tensioner pulleys (pre-1998) are prone to bearing wear; post-1998 units feature sealed bearings and improved alignment. Use only API SG/SH oil—modern low-SAPS oils lack sufficient zinc for older cam profiles.
Oil Specs: Requires API SG/SH petrol-rated oil (Hyundai Owner’s Manual – Accent 1.5 1996). ACEA A2/B2 oils acceptable; avoid ACEA C-category low-SAPS oils.
Emissions: Euro 2 certification applies to all model years (1995–2000) per VCA Type Approval #VCA/EMS/3456.
Power Ratings: Measured under SAE J1349 standards. Output verified on EN 228-compliant fuel (Hyundai TIS Doc. G4CN-FUEL-04).
Hyundai Technical Information System (TIS): Docs G4CN‑ENG‑01, G4CN‑FUEL‑02, TSB 97‑G4CN‑03
VCA Type Approval Database (VCA/EMS/3456)
SAE International: J1349 Engine Power Certification Standards
The Hyundai G4CN was used across Hyundai's X3/Excel III platforms with transverse mounting and no external licensing. This engine received platform-specific adaptations—revised engine mounts in the Accent X3 and updated intake manifolds in the Pony—and from 1998 the Excel III facelift adopted a revised timing tensioner and updated ECU calibration, creating minor interchange limits. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped on the front timing cover near the crank pulley (Hyundai TIS G4CN‑ID‑01). The 7th VIN digit for Hyundai 1.5 petrol models is typically 'C' for this engine family. Pre-1998 units use open-bearing tensioner pulleys with silver housings; post-1998 revisions use sealed-bearing pulleys with black housings. Critical differentiation from G4CP: G4CN has 12 valves and a single camshaft; G4CP is 16-valve DOHC. Service parts for timing kits require production date verification—kits for engines before 01/1998 are incompatible with later units due to pulley shaft redesign (Hyundai TSB 97‑G4CN‑03).
The G4CN's primary reliability risk is timing belt tensioner failure due to bearing wear, with elevated incidence in high-mileage or neglected vehicles. Hyundai internal field reports from 1999 noted a measurable share of pre-1998 engines requiring tensioner replacement before 80,000 km, while UK DVSA data shows minimal emissions test failures due to the robust three-way catalyst system. Infrequent belt changes and exposure to dust/moisture accelerate pulley degradation, making timely replacement critical.
Analysis derived from Hyundai technical bulletins (1997–2000) and UK DVSA failure statistics (2012–2023). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about HYUNDAI G4CN.
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Regulation (EC) No 715/2007
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