Hyundai Theta engine
Encyclopedia
The Hyundai
Theta (G4KC) is a gasoline 4-cylinder
automobile
engine family. The third all-aluminum engine of Hyundai Motor Company
debuted in the fourth-generation Hyundai Sonata
sedan (codenamed NF), which was unveiled in August 2004 in South Korea
.
Morse TEC supplies the complete timing system which uses the company's proprietary silent timing chains. Continuously variable valve timing (CVVT) works on the intake side. The aluminum alloy engine block, which is formed using a high-pressure die-cast method, has a unique Metaldyne-supplied cassette-type balance shaft module with a two-stage oil pump
built-in. In the lower-end, the block is reinforced by a ladder frame. Other notable features include fracture-split sinter-forged connecting rods and a stainless-steel exhaust manifold. Theta's EMS (engine management system) software is EMS-II from Siemens VDO
and the 32-bit PCM (Powertrain Control Module) calculates the amount of intake air by utilizing a contamination-proof hot-film type MAF (mass air flow) sensor. In the 2011 Hyundai Sonata
and Kia Optima
, this engine will have Gasoline Direct Injection and produce between 198 hp-200 hp and 184 lbft -186 lbft of torque.
, in Dundee, Michigan
in October 2005. Chrysler engineered their own air intake system and exhaust manifold which is made of gray cast iron
. The World Engine also differs in the EMS as it measures the amount of intake air indirectly using a MAP sensor
, to lower production costs. Contrary to what Chrysler Corporation has stated, the Theta engine factory in Asan
, South Korea
is not a part of the Global Engine Manufacturing Alliance
. Construction of the Korean factory began in August 2003 and it came on line in April 2004. It is owned and operated by Hyundai Motor Company.
Hyundai Motor Manufacturing Alabama
(HMMA) is currently building a Theta II engine shop on the grounds of their Montgomery, Alabama
automobile factory. The shop will build only the Theta II engine for both the Hyundai plant and the new Kia Plant in West Point, GA. It was completed in August 2008.
The turbo used is a Mitsubishi TD04 model. In stock trim this unit pushes a peak of approx. 16-18psi with a sustained 14psi. This value can be changed with a boost controller and tuning.
The 2.0L GDI turbo in 2011 Sonata develops 274 hp and 269 lbft of torque. The fuel economy is rated at 22mpg(10.7L / 100KM) in the city and 34mpg(6.92L / 100KM) on the highway. It comes exclusively with a 6-speed AT. The engine has a maximum boost of 17psi and features twin-scroll turbocharger.
Hyundai Motor Company
Hyundai Motor Company is a Korean multinational automaker based in Seoul, South Korea which, along with Kia, comprises the Hyundai Kia Automotive Group, the world's fourth largest automaker as of 2009. As of 2011, it is the world's fastest growing automaker for two years running...
Theta (G4KC) is a gasoline 4-cylinder
Straight-4
The inline-four engine or straight-four engine is an internal combustion engine with all four cylinders mounted in a straight line, or plane along the crankcase. The single bank of cylinders may be oriented in either a vertical or an inclined plane with all the pistons driving a common crankshaft....
automobile
Automobile
An automobile, autocar, motor car or car is a wheeled motor vehicle used for transporting passengers, which also carries its own engine or motor...
engine family. The third all-aluminum engine of Hyundai Motor Company
Hyundai Motor Company
Hyundai Motor Company is a Korean multinational automaker based in Seoul, South Korea which, along with Kia, comprises the Hyundai Kia Automotive Group, the world's fourth largest automaker as of 2009. As of 2011, it is the world's fastest growing automaker for two years running...
debuted in the fourth-generation Hyundai Sonata
Hyundai Sonata
The Hyundai Sonata is a mid-size car/full-size car manufactured and marketed globally by Hyundai Motor Company. From the sixth generation onwards, it is known as the i45 in the Australian, Singaporean and New Zealand markets...
sedan (codenamed NF), which was unveiled in August 2004 in South Korea
South Korea
The Republic of Korea , , is a sovereign state in East Asia, located on the southern portion of the Korean Peninsula. It is neighbored by the People's Republic of China to the west, Japan to the east, North Korea to the north, and the East China Sea and Republic of China to the south...
.
Technical details
It features hollow stainless-steel DOHC with powder-metal cam lobes, pent-roof combustion chamber and shimless bucket tappets in the cylinder head. BorgWarnerBorgWarner
BorgWarner Inc. is a United States-based worldwide automotive industry components and parts supplier. It is primarily known for its powertrain products, which include manual and automatic transmissions and transmission components, , turbochargers, engine valve timing system...
Morse TEC supplies the complete timing system which uses the company's proprietary silent timing chains. Continuously variable valve timing (CVVT) works on the intake side. The aluminum alloy engine block, which is formed using a high-pressure die-cast method, has a unique Metaldyne-supplied cassette-type balance shaft module with a two-stage oil pump
Oil pump (internal combustion engine)
The oil pump in an internal combustion engine circulates engine oil under pressure to the rotating bearings, the sliding pistons and the camshaft of the engine...
built-in. In the lower-end, the block is reinforced by a ladder frame. Other notable features include fracture-split sinter-forged connecting rods and a stainless-steel exhaust manifold. Theta's EMS (engine management system) software is EMS-II from Siemens VDO
Siemens VDO
VDO , is a manufacturer of information and cockpit systems, navigation, telematics, communication and audio systems, and control and fuel systems....
and the 32-bit PCM (Powertrain Control Module) calculates the amount of intake air by utilizing a contamination-proof hot-film type MAF (mass air flow) sensor. In the 2011 Hyundai Sonata
Hyundai Sonata
The Hyundai Sonata is a mid-size car/full-size car manufactured and marketed globally by Hyundai Motor Company. From the sixth generation onwards, it is known as the i45 in the Australian, Singaporean and New Zealand markets...
and Kia Optima
Kia Optima
The Kia Optima is a mid-size four-door sedan manufactured by Kia Motors since 2000 and marketed globally through various nameplates. First generation cars were mostly marketed as the Optima, although the Kia Magentis name was used in Europe and Canada when sales began there in 2002...
, this engine will have Gasoline Direct Injection and produce between 198 hp-200 hp and 184 lbft -186 lbft of torque.
World Engine
Chrysler Corporation and Mitsubishi Motor began production of a modified version of Theta, dubbed World EngineGlobal Engine Manufacturing Alliance
The Global Engine Manufacturing Alliance LLC, or GEMA, is a manufacturing arm of Global Engine Alliance LLC, which was a joint venture of Chrysler, Mitsubishi Motors, and Hyundai Motor Company for developing a line of shared engines...
, in Dundee, Michigan
Dundee, Michigan
Dundee is a village in Monroe County in the U.S. state of Michigan. The population was 3,522 at the 2000 census. The village is located within Dundee Township. Through a series of annexations and land transfers, the village has greatly increased in size over the past several years...
in October 2005. Chrysler engineered their own air intake system and exhaust manifold which is made of gray cast iron
Cast iron
Cast iron is derived from pig iron, and while it usually refers to gray iron, it also identifies a large group of ferrous alloys which solidify with a eutectic. The color of a fractured surface can be used to identify an alloy. White cast iron is named after its white surface when fractured, due...
. The World Engine also differs in the EMS as it measures the amount of intake air indirectly using a MAP sensor
MAP sensor
The manifold absolute pressure sensor is one of the sensors used in an internal combustion engine's electronic control system. Engines that use a MAP sensor are typically fuel injected. The manifold absolute pressure sensor provides instantaneous manifold pressure information to the engine's...
, to lower production costs. Contrary to what Chrysler Corporation has stated, the Theta engine factory in Asan
Asan
Asan is a city in South Chungcheong Province, South Korea. It is located at , bordering the Seoul Metropolitan Area to the north. Asan has a population of approximately 250,000.Asan is known for its hot springs and is a city of spas....
, South Korea
South Korea
The Republic of Korea , , is a sovereign state in East Asia, located on the southern portion of the Korean Peninsula. It is neighbored by the People's Republic of China to the west, Japan to the east, North Korea to the north, and the East China Sea and Republic of China to the south...
is not a part of the Global Engine Manufacturing Alliance
Global Engine Manufacturing Alliance
The Global Engine Manufacturing Alliance LLC, or GEMA, is a manufacturing arm of Global Engine Alliance LLC, which was a joint venture of Chrysler, Mitsubishi Motors, and Hyundai Motor Company for developing a line of shared engines...
. Construction of the Korean factory began in August 2003 and it came on line in April 2004. It is owned and operated by Hyundai Motor Company.
Hyundai Motor Manufacturing Alabama
Hyundai Motor Manufacturing Alabama
Hyundai Motor Manufacturing Alabama is an automobile factory in Montgomery, Alabama. It is owned and operated by Hyundai Motor Company of Korea. Construction completed in June, 2004, with the first vehicles produced in March of 2005. The official grand opening ceremony on May 20, 2005, was...
(HMMA) is currently building a Theta II engine shop on the grounds of their Montgomery, Alabama
Montgomery, Alabama
Montgomery is the capital of the U.S. state of Alabama, and is the county seat of Montgomery County. It is located on the Alabama River southeast of the center of the state, in the Gulf Coastal Plain. As of the 2010 census, Montgomery had a population of 205,764 making it the second-largest city...
automobile factory. The shop will build only the Theta II engine for both the Hyundai plant and the new Kia Plant in West Point, GA. It was completed in August 2008.
Theta/Theta-II Engine - 2.4L
- Hyundai SonataHyundai SonataThe Hyundai Sonata is a mid-size car/full-size car manufactured and marketed globally by Hyundai Motor Company. From the sixth generation onwards, it is known as the i45 in the Australian, Singaporean and New Zealand markets...
(2006-2010) - Hyundai SonataHyundai SonataThe Hyundai Sonata is a mid-size car/full-size car manufactured and marketed globally by Hyundai Motor Company. From the sixth generation onwards, it is known as the i45 in the Australian, Singaporean and New Zealand markets...
GDI (2011-) - Hyundai TucsonHyundai TucsonThe Hyundai Tucson , or ix35 in Europe, or Hyundai JM in Japan, is a compact crossover SUV built and marketed by the Hyundai Motor Corporation. In Hyundai's lineup, the Tucson fits below the Santa Fe and Veracruz....
(2010-) - Hyundai Santa FeHyundai Santa FeThe Hyundai Santa Fe is a mid-size crossover SUV based on the Hyundai Sonata platform. Named after the city of Santa Fe, New Mexico, it was introduced for the 2001 model year as Hyundai's first SUV, released at the same time as the Ford Escape/Mazda Tribute and Pontiac Aztek...
(2010-) - Kia OptimaKia OptimaThe Kia Optima is a mid-size four-door sedan manufactured by Kia Motors since 2000 and marketed globally through various nameplates. First generation cars were mostly marketed as the Optima, although the Kia Magentis name was used in Europe and Canada when sales began there in 2002...
(2006-2010) - Kia OptimaKia OptimaThe Kia Optima is a mid-size four-door sedan manufactured by Kia Motors since 2000 and marketed globally through various nameplates. First generation cars were mostly marketed as the Optima, although the Kia Magentis name was used in Europe and Canada when sales began there in 2002...
GDI (2011-) - Kia Rondo (2007-2010)
- Kia CadenzaKia CadenzaThe Kia Cadenza, or Kia K7 in South Korea, is Kia's new full-size car to replace the Kia Opirus/Amanti. It is considered to be Kia's flagship vehicle....
GDI (2011-) - Kia SportageKia SportageThe Kia Sportage is a compact crossover SUV built by the Korean automaker Kia Motors since July 1993.- First generation :...
(2011-) - Kia SorentoKia SorentoThe Kia Sorento is a mid-size crossover SUV produced since 2002 by the South Korean automaker Kia Motors.- First generation :...
(2011-) - Kia ForteKia ForteThe Kia Forte is a compact car manufactured by Kia Motors since mid-2008 to replace the Cerato, available in two-door coupe, four-door sedan, five-door hatchback variants...
(2010-)
Theta/Theta-II Engine - 2.0L
- Hyundai Genesis CoupeHyundai Genesis CoupeThe Hyundai Genesis Coupé is a rear-wheel drive sports coupe from Hyundai Motor Company, released on October 13, 2008 for the Korean market. It is Hyundai's first rear-wheel drive sports coupe, and shares its basic platform with the Hyundai Genesis luxury sedan....
Port Injected 2.0 Turbocharged (2010~) - Hyundai SonataHyundai SonataThe Hyundai Sonata is a mid-size car/full-size car manufactured and marketed globally by Hyundai Motor Company. From the sixth generation onwards, it is known as the i45 in the Australian, Singaporean and New Zealand markets...
GDI 2.0 Turbocharged (2011~) - Kia ForteKia ForteThe Kia Forte is a compact car manufactured by Kia Motors since mid-2008 to replace the Cerato, available in two-door coupe, four-door sedan, five-door hatchback variants...
2.0 (2009~) - Kia OptimaKia OptimaThe Kia Optima is a mid-size four-door sedan manufactured by Kia Motors since 2000 and marketed globally through various nameplates. First generation cars were mostly marketed as the Optima, although the Kia Magentis name was used in Europe and Canada when sales began there in 2002...
GDI 2.0 Turbocharged (2011~) - Kia SportageKia SportageThe Kia Sportage is a compact crossover SUV built by the Korean automaker Kia Motors since July 1993.- First generation :...
GDI 2.0 Turbocharged (2011~)
2.0T GDI turbo
The Theta engine is turbocharged for use in the Genesis Coupe. In this form it produces 210 hp @ 6,000rpm on 87 octane (AKI) gasoline, and 223 hp on 93 AKI. Torque remains the same at 223 lbft @ 2000rpm. The Theta block used is very similar to the Mitsubishi Evolution X 4B11T, but the two engines are not identical.The turbo used is a Mitsubishi TD04 model. In stock trim this unit pushes a peak of approx. 16-18psi with a sustained 14psi. This value can be changed with a boost controller and tuning.
The 2.0L GDI turbo in 2011 Sonata develops 274 hp and 269 lbft of torque. The fuel economy is rated at 22mpg(10.7L / 100KM) in the city and 34mpg(6.92L / 100KM) on the highway. It comes exclusively with a 6-speed AT. The engine has a maximum boost of 17psi and features twin-scroll turbocharger.
Chrysler World Engine - 1.8/2.0/2.4L
- Dodge CaliberDodge CaliberThe Dodge Caliber was a compact car produced by the Dodge division of Chrysler. It replaced the Neon, and it went on sale in the spring of 2006 as a 2007 model year vehicle...
- Jeep CompassJeep CompassThe Jeep Compass is a compact crossover SUV introduced for the 2007 model year. The Jeep Compass, along with the Patriot both slot below the Jeep Wrangler as Jeep's entry-level sport utility vehicles, and is one of Jeep's first crossover SUVs....
and Jeep PatriotJeep PatriotThe Jeep Patriot is a compact crossover SUV introduced in early 2007 for the 2007 model year by the Jeep marque of Chrysler. It debuted publicly in April 2006 at the New York Auto Show and slots between the Compass and Liberty in the Jeep lineup...
Mitsubishi 4B11/4B11T/4B12 Engine - 2.0/2.0 Turbo/2.4L
- Mitsubishi LancerMitsubishi LancerThe Mitsubishi Lancer is a family car built by Mitsubishi Motors. It has been known as the Colt Lancer, Dodge/Plymouth Colt, Chrysler Valiant Lancer, Chrysler Lancer, Eagle Summit, Hindustan Lancer, Soueast Lioncel, Mitsubishi Carisma, and Mitsubishi Mirage in various countries at different times,...
(2008-) - Mitsubishi Lancer EvolutionMitsubishi Lancer EvolutionThe Mitsubishi Lancer Evolution, colloquially known as the Lancer Evo or Evo, is a high-performance sedan manufactured by Mitsubishi Motors. There have been ten official versions to date, and the designation of each model is most commonly a roman numeral...
(2008-)
External links
- Hyundai Motor Korea -- V6 3.0 Lambda Engine for 5G Grandeur - Korean link
- Hyundai Motor America Technician Internet Training -- Theta Engine(2.4L)
- Hyundai Motor Company Australia press release on the all-new Sonata
- SAE Technical Paper: New Energy Efficient Balance Shaft / Oil Pump Module for Hyundai NF