Engine Hyundai-Kia G4NA

The 2.0-liter Hyundai G4NA engine was first introduced by the company in 2010 and is installed on almost all significant models of the concern, such as Elantra, Optima and Sonata. There is a gas version of this engine without petrol injectors under its L4NA index.

In 2010, Hyundai-Kia introduced a 2.0-liter engine as part of the new Nu line. This is a quite typical power unit for that time with distributed fuel injection, an aluminum block with thin-walled cast-iron liners, an open cooling jacket, a 16-valve head with hydraulic compensators, a timing chain, phase shifters on two shafts, and a plastic intake manifold equipped with a VIS geometry change system.

The engineers of the Korean company constantly refined the power unit and the most useful innovation here was the appearance in 2017 of oil piston cooling nozzles. After that, the problem with seizures in the cylinders, of course, did not disappear, but became less common.

The Nu family includes engines: G4NB, G4NA, G4NC, G4ND, G4NE, G4NH, G4NG, G4NL, G4NN.

The engine was installed on:

• Hyundai Creta 1 (GS) since 2015;
• Hyundai Creta 2 (SU2) since 2021;
• Hyundai Elantra 5 (MD) in 2013 – 2016; Elantra 6 (AD) since 2015;
• Hyundai ix35 1 (LM) in 2013 – 2015;
• Hyundai i40 1 (VF) in 2011 – 2019;
• Hyundai Sonata 7 (LF) in 2014 – 2019; Sonata 8 (DN8) since 2019;
• Hyundai Tucson 3 (TL) since 2015;
• Kia Carens 4 (RP) in 2015 – 2018;
• Kia Cerato 3 (YD) in 2012 – 2018; Cerato 4 (BD) since 2018;
• Kia K5 3 (DL3) since 2019;
• Kia Optima 3 (TF) in 2013 – 2016; Optima 4 (JF) in 2015 – 2020;
• Kia Soul 1 (AM) in 2011 – 2014; Soul 2 (PS) in 2013 – 2019; Soul 3 (SK3) since 2019;
• Kia Sportage 3 (SL) in 2014 – 2016; Sportage 4 (QL) since 2015.

Specifications

Disadvantages of the Hyundai G4NA engine

• The most serious problem of this unit is the appearance of scoring in the cylinders. The reason is a weak catalyst, which is quickly destroyed by our fuel, and when it clogs, its crumbs are sucked into the combustion chambers and they scratch the walls.
• The culprit in the consumption of lubricant in such a unit can be not only scuffs in the cylinders. By design, there is an open cooling jacket and rather thin cast-iron sleeves, and with active use or regular overheating, they can easily go elliptical.
• For calm drivers, the timing chain runs 300,000 km, but if you constantly turn the engine, then its resource will be at least halved: there are many examples of replacements up to 100,000 km. When stretched, the chain does not break, but usually jumps and often bends the valves.
• On specialized forums, they complain about regular leaks of lubricant and antifreeze due to weak gaskets, a rather modest resource of the water pump, generator clutch and power unit supports. Also on the motors of the first years there were weak liners and they could simply be cranked.