Hyundai-Kia G4KD
The most famous problem with Theta engines is the formation of scuffing in the cylinders due to the ingress of catalyst crumbs…
Kia Optima engines
The Kia Optima or Kia Magentis is a mid-range sedan from the manufacturer Kia Motors Corporation. Production began in 2000. In 2016, the fourth generation model was launched. The sale of the model, depending on the country, takes place under different names. Cars of the 4th generation for Russia are assembled at the Kaliningrad “Avtokor” in the body version of a sedan. In addition to South Korea itself, there are factories for the production of Kia Optima in the USA, China, Malaysia and Kazakhstan.
The Kia Optima was offered with 11 engines between 2010 and 2020 (2 diesel, 9 petrol). Displacement ranges from 1.6 to 2.4 liters, power output from 116 to 280 hp. All of them use a timing chain. 4 are turbocharged. The longest rated lifespan belongs to the Hyundai-Kia D4FD (about 350,000 km).
Kia Optima engines by generation
| Engine | Years | Volume | Power | Fuel | Timing | Oil | Lifespan |
|---|---|---|---|---|---|---|---|
| Kia Optima 3 (TF) 2010–2016 | |||||||
| Hyundai-Kia G4KJ | 2010–2015 | 2.4 L R4 | 180–201 hp | petrol | chain | 5.8 L | ~300,000 km |
| Hyundai-Kia G4KH | 2010–2015 | 2.0 L R4 | 240–280 hp | petrol, turbo | chain | 6.1 L | ~200,000 km |
| Hyundai-Kia G4KD | 2010–2013 | 2.0 L R4 | 145–165 hp | petrol | chain | 4.5–6.5 L | ~300,000 km |
| Hyundai-Kia G4KK | 2011–2015 | 2.4 L R4 | petrol | chain | 4.6 L | ~270,000 km | |
| Hyundai-Kia D4FD | 2012–2015 | 1.7 L R4 | 116–141 hp | diesel, turbo | chain | 5.7 L | ~350,000 km |
| Hyundai-Kia G4NE | 2012–2015 | 2.0 L R4 | 150 hp | petrol | chain | 4.3 L | ~250,000 km |
| Hyundai-Kia G4ND | 2012–2016 | 2.0 L R4 | 150–172 hp | petrol | chain | 4.8 L | ~300,000 km |
| Hyundai-Kia G4NA | 2013–2016 | 2.0 L R4 | 150–167 hp | petrol | chain | 4.5 L | ~300,000 km |
| Kia Optima 4 (JF) 2015–2020 | |||||||
| Hyundai-Kia D4FD | 2015–2018 | 1.7 L R4 | 116–141 hp | diesel, turbo | chain | 5.7 L | ~350,000 km |
| Hyundai-Kia G4KJ | 2015–2020 | 2.4 L R4 | 180–201 hp | petrol | chain | 5.8 L | ~300,000 km |
| Hyundai-Kia G4KH | 2015–2020 | 2.0 L R4 | 240–280 hp | petrol, turbo | chain | 6.1 L | ~200,000 km |
| Hyundai-Kia G4ND | 2015–2020 | 2.0 L R4 | 150–172 hp | petrol | chain | 4.8 L | ~300,000 km |
| Hyundai-Kia G4NA | 2015–2020 | 2.0 L R4 | 150–167 hp | petrol | chain | 4.5 L | ~300,000 km |
| Hyundai-Kia G4NG | 2016–2020 | 2.0 L R4 | 154 hp | petrol | chain | 4.3 L | ~250,000 km |
| Hyundai-Kia D4FE | 2018–2019 | 1.6 L R4 | 116–136 hp | diesel, turbo | chain | 4.4 L | ~250,000 km |
| Hyundai-Kia G4FJ | 2018–2019 | 1.6 L R4 | 177–204 hp | petrol, turbo | chain | 5.1 L | ~250,000 km |
Kia Optima engine FAQ
What engines were used in the Kia Optima?
Kia Optima 3 (TF) (2010–2016): Hyundai-Kia G4KJ, Hyundai-Kia G4KH, Hyundai-Kia G4KD, Hyundai-Kia G4KK, Hyundai-Kia D4FD, Hyundai-Kia G4NE, Hyundai-Kia G4ND and Hyundai-Kia G4NA; Kia Optima 4 (JF) (2015–2020): Hyundai-Kia D4FD, Hyundai-Kia G4KJ, Hyundai-Kia G4KH, Hyundai-Kia G4ND, Hyundai-Kia G4NA, Hyundai-Kia G4NG, Hyundai-Kia D4FE and Hyundai-Kia G4FJ.
Which Kia Optima engine is the most durable?
By rated service life the most durable Kia Optima engines are: Hyundai-Kia D4FD — about 350,000 km; Hyundai-Kia G4KD — about 300,000 km; Hyundai-Kia G4KJ — about 300,000 km. Actual lifespan depends heavily on maintenance and oil change intervals.
How much oil does the Kia Optima engine take?
Engine oil capacity with filter: Hyundai-Kia D4FD — 5.7 L (0W-30, 5W-30); Hyundai-Kia D4FE — 4.4 L (5W-30); Hyundai-Kia G4FJ — 5.1 L (0W-30, 5W-30); Hyundai-Kia G4KD — 4.5–6.5 L (5W-30, 5W-40); Hyundai-Kia G4KH — 6.1 L (5W-20, 5W-30); Hyundai-Kia G4KJ — 5.8 L (5W-20, 5W-30); Hyundai-Kia G4KK — 4.6 L (5W-30); Hyundai-Kia G4NA — 4.5 L (5W-20, 5W-30); Hyundai-Kia G4ND — 4.8 L (5W-20, 5W-30); Hyundai-Kia G4NE — 4.3 L (5W-30); Hyundai-Kia G4NG — 4.3 L (5W-30).
Does the Kia Optima have a timing belt or chain?
Timing chain: Hyundai-Kia D4FD, Hyundai-Kia D4FE, Hyundai-Kia G4FJ, Hyundai-Kia G4KD, Hyundai-Kia G4KH, Hyundai-Kia G4KJ, Hyundai-Kia G4KK, Hyundai-Kia G4NA, Hyundai-Kia G4ND, Hyundai-Kia G4NE and Hyundai-Kia G4NG.
Was the Kia Optima available with a diesel engine?
Yes: Hyundai-Kia D4FD and Hyundai-Kia D4FE.
Engine details
Hyundai-Kia G4KJ
The most famous problem with this engine is the wedge due to the rotation of the liners and the reason for the…
Hyundai-Kia D4FD
The main problems for the owner are the rapid contamination of the intake manifold, equipped with swirl flaps. It has to be…
Hyundai-Kia G4KH
These turbo engines are very demanding on the quality of the oil and the procedure for replacing it, otherwise the risk of…
Hyundai-Kia G4NA
The most serious problem of this unit is the appearance of scoring in the cylinders. The reason is a weak catalyst, which…
Hyundai-Kia G4FJ
The first years of production, candles often fell apart here and their fragments left scuffs, and pistons burst from detonation, and even…
Hyundai-Kia G4KK
The main problems are not their reliability, but the shortage of specialists or spare parts.
Hyundai-Kia G4ND
The main complaints of the owners of these engines are caused by the appearance of scuffing in the cylinders, which are formed…
Hyundai-Kia G4NE
This motor is a real exclusive, there are very few such cars produced.
Hyundai-Kia G4NG
The main problem is not reliability, but the lack of necessary specialists and spare parts.
Hyundai-Kia D4FE
So far, the main complaints on specialized forums are caused by the vagaries of the engine fuel system.
Models with the same engines
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- Kia Sportage 8 shared engines
- Hyundai Tucson 6 shared engines
- Hyundai ix35 4 shared engines
- Kia Cerato 4 shared engines
- Hyundai Elantra 3 shared engines
- Hyundai i30 3 shared engines
- Kia Carens/Rondo 3 shared engines
- Hyundai Grandeur 2 shared engines
- Hyundai Santa Fe 2 shared engines