What are the main advantages of the G4KC engine?

Excellent fuel economy for the displacement typically achieving 7.5-9.5 L/100km in mixed driving conditions. Proven reliability with many examples exceeding 250,000 km without major issues in various global markets. Strong warranty support from Hyundai-Kia provides excellent peace of mind for original and subsequent owners. Good power output provides adequate performance for family vehicles and everyday driving situations. Affordable maintenance costs due to competitive parts pricing and widespread service network availability. Smooth power delivery with good torque characteristics suitable for both city and highway driving. Well-established global service network with extensive technician training and support programs. Advanced engine management provides excellent cold weather operation and adaptive performance tuning.

What are common issues and problems with the G4KC?

Timing chain inspection required Oil consumption monitoring Spark plug replacement Intake manifold cleaning PCV valve replacement

What torque does the G4KC engine produce?

The G4KC engine produces 226 Nm.

What is the compression ratio of the G4KC engine?

The compression ratio of the G4KC engine is 10.5:1.

How much displacement does the G4KC engine have?

The G4KC engine has 2.4L (2359 cc) of displacement.

What is the fuel consumption of the G4KC engine?

Reported fuel consumption for the G4KC engine is 10.1-7.2L/100km.

Hyundai/Kia G4KC Engine Specs

Hyundai/Kia

Quick overview

Hyundai/Kia G4KC is a 2.4L (2359 cc) petrol engine with 175 HP, 226 Nm, 10.5:1 compression ratio. Fuel consumption: 10.1-7.2L/100km. Typical service life: 250,000+.

175

2.4L (2359 cm³)

Displacement

226 Nm @ 4000 RPM

Torque

Petrol

Fuel

Description

The highly successful G4KC Theta engine became Hyundai-Kia's most important mid-size gasoline engine, powering millions of vehicles across global markets and establishing the Korean manufacturers as serious competitors in the mainstream automotive segment. This 2.4-liter naturally aspirated four-cylinder engine provided excellent balance between performance and fuel economy.

Built with modern aluminum construction and sophisticated engine management, the G4KC featured multipoint fuel injection, variable valve timing, and optimized port design for excellent breathing. The engine was designed to meet diverse global market requirements while maintaining Hyundai-Kia's reputation for value and reliability.

The G4KC's success came from its remarkable versatility and proven durability - it served reliably across diverse climates and applications, from compact sedans to mid-size SUVs, demonstrating excellent adaptability across the Hyundai-Kia product lineup.

General Information

Production Years: 2004-2015

Fuel Type: Petrol

Environmental Standards: Euro 4-5

Fuel Consumption: 10.1-7.2L/100km (32.7-23.3 mpg)

Power (HP): 175

Displacement: 2.4L (2359 cm³) (144 cu.in)

Torque: 226 Nm @ 4000 RPM (167-2950 lb-ft)

Cylinder Block Alloy: Aluminum alloy

Cylinder Head Alloy: Aluminum alloy

Has Turbo: No

Engine Layout: I4

Aspiration Type: Naturally Aspirated

Fuel System: Multipoint Fuel Injection

Head Type: DOHC, 16 valves

Timing Drive: Chain

Cooling Type: Liquid cooling

Cylinders Count: 4

Technical Details

Cylinder Diameter: 88.0mm

Piston Stroke: 97.0mm

Total Valves: 16

Firing Order: 1-3-4-2

Weight: 140 kg (309 lbs)

Rings per Piston: 3 (2/1)

Compression Ratio: 10.5:1

Hydraulic Lifters: No

Cylinder Coating: Cast iron sleeve

Minimum Octane: 95

Maintenance

Oil Capacity: 4.8L (5.1 qts)

Recommended Oil: 5W-20

Operating Temperature: 85-95°C (185-203°F)

Thermostat Temperature: 87-92°C (189-198°F)

Service Life (km): 250,000+ (155 miles)

Timing Belt/Chain Interval: Chain - no replacement needed

Scores

Reliability

Economy

Power

Values 1–100. Calculated from engine specs.

Advantages

+ Excellent fuel economy for the displacement typically achieving 7.5-9.5 L/100km in mixed driving conditions.
+ Proven reliability with many examples exceeding 250,000 km without major issues in various global markets.
+ Strong warranty support from Hyundai-Kia provides excellent peace of mind for original and subsequent owners.
+ Good power output provides adequate performance for family vehicles and everyday driving situations.
+ Affordable maintenance costs due to competitive parts pricing and widespread service network availability.
+ Smooth power delivery with good torque characteristics suitable for both city and highway driving.
+ Well-established global service network with extensive technician training and support programs.
+ Advanced engine management provides excellent cold weather operation and adaptive performance tuning.

Pay Attention

! Timing chain inspection required
! Oil consumption monitoring
! Spark plug replacement
! Intake manifold cleaning
! PCV valve replacement

Used in Vehicles

Hyundai Sonata NF (2004-2010)

Hyundai Sonata YF (2010-2014)

Hyundai Azera TG (2005-2011)

Hyundai Santa Fe CM (2006-2012)

Hyundai Tucson JM (2004-2010)

Hyundai Veracruz EN (2007-2012)

Hyundai Elantra HD (2006-2010)

Kia Optima MS (2000-2005)

Kia Optima MG (2005-2010)

Kia Optima TF (2010-2015)

Kia Magentis MS (2000-2005)

Kia Magentis MG (2005-2010)

Kia Sorento BL (2002-2009)

Kia Sportage KM (2004-2010)

Kia Carens FJ (2006-2012)

Kia Rondo UN (2006-2012)