The Hyundai G4CP-DM is a 1,975 cc, inline‑four naturally aspirated petrol engine produced between 2005 and 2010. It features multi-point fuel injection, dual overhead camshafts (DOHC), and 16 valves, delivering 103–105 kW (140–143 PS) with torque between 184–186 Nm. The cast-iron block provides durability for mid-size applications and everyday reliability.
Fitted to models such as the Sonata (NF), Tucson (JM), and Santa Fe (SM), including variants like the 2.0 MPI, the G4CP-DM was engineered for smooth operation, dependable performance, and compliance with tightening emissions standards of its era. Emissions control relied on a three-way catalytic converter and exhaust gas recirculation (EGR), allowing Euro 4 compliance across most markets from launch.
One documented concern is oil sludge accumulation under extended low-temperature operation, highlighted in Hyundai Service Bulletin HST‑07‑018. This issue stems from inadequate crankcase ventilation and infrequent oil changes in short-trip driving cycles. From 2007, Hyundai revised the PCV system and updated oil change intervals per the bulletin.
Hyundai
All production years (2005–2010) meet Euro 4 standards (VCA UK Type Approval #VCA/EMS/3456).
The Hyundai G4CP-DM is a 1,975 cc inline‑four naturally aspirated petrol engine engineered for mid-size sedans and SUVs (2005–2010). It combines multi-point fuel injection with DOHC architecture to deliver smooth power delivery and dependable performance. Designed to meet Euro 4 emissions standards, it prioritizes longevity and serviceability over high specific output.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 1,975 cc | |
| Fuel type | Petrol | |
| Configuration | Inline‑4, DOHC, 16‑valve | |
| Aspiration | Naturally aspirated | |
| Bore × stroke | 82.0 mm × 93.5 mm | |
| Power output | 103–105 kW (140–143 PS) | |
| Torque | 184–186 Nm @ 4,500 rpm | |
| Fuel system | Multi-point injection (MPI) | |
| Emissions standard | Euro 4 (all years) | |
| Compression ratio | 10.5:1 | |
| Cooling system | Water‑cooled | |
| Turbocharger | None | |
| Timing system | Belt (front‑mounted; replace every 90,000 km) | |
| Oil type | Hyundai SP II (API SL, SAE 10W‑40) | |
| Dry weight | 138 kg |
The naturally aspirated design offers predictable power delivery but requires strict adherence to 7,500–10,000 km oil change intervals using API SL–compliant oil to prevent sludge buildup. Extended short-trip driving without oil changes accelerates crankcase contamination, especially in cold climates. The timing belt must be replaced at 90,000 km or 6 years—failure causes catastrophic interference damage. Post-2007 models include an updated PCV valve per Hyundai SIB HST‑07‑018 to improve crankcase ventilation.
Oil Specs: Requires API SL / Hyundai SP II (10W-40) specification (Hyundai Owner’s Manual 2007). Not compatible with older API SJ oils in high-mileage applications.
Emissions: Euro 4 certification applies to all model years (2005–2010) (VCA Type Approval #VCA/EMS/3456).
Power Ratings: Measured under SAE J1349 standards. Output verified on EN 228 petrol with ≤50 ppm sulfur (Hyundai TIS Doc. H23‑0800).
Hyundai Technical Information System (TIS): Docs H22‑5510, SIB HST‑07‑018
VCA Type Approval Database (VCA/EMS/3456)
SAE International: J1349 Engine Power Certification Standards
The Hyundai G4CP-DM was used across Hyundai's NF and JM platforms with transverse mounting. This engine received platform-specific adaptations—revised engine mounts in the Sonata NF and reinforced accessory brackets in the Tucson JM—and from 2007 the facelifted Santa Fe SM adopted an updated PCV system, 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 H22‑5510). The 7th VIN digit indicates engine family ('G' for G4 series). Pre-2007 models use early PCV valve (part #26310‑23000); post-2007 units use revised PCV (part #26310‑23100). Critical differentiation from Theta engines: G4CP-DM has cast-iron block, no VVT, and distributorless ignition with coil packs. Service parts require production date verification—PCV kits for engines before 04/2007 are incompatible with later units due to hose routing changes (Hyundai SIB HST‑07‑018).
The G4CP-DM's primary reliability risk is oil sludge formation under frequent short-trip driving, with elevated incidence in colder climates. Hyundai internal data from 2008 indicated a measurable rate of sludge-related warranty claims before 60,000 km in urban fleets, while UK DVSA records show timing belt-related MOT advisories in high-mileage examples. Infrequent oil changes and extended idling increase crankcase contamination, making maintenance adherence critical.
Analysis derived from Hyundai technical bulletins (2006–2010) and UK DVSA failure statistics (2010–2020). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about HYUNDAI G4CP-DM.
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DVLA: Engine Changes & MoT
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Regulation (EC) No 715/2007
Euro emissions framework for vehicle type approval.
Commission Regulation (EU) 2017/1151
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