The Hyundai G4FG engine is a 1.6-liter atmospheric engine with an aluminum block and injector power system. Thanks to its clever design and combination of modern technologies, the engine has become popular in the Hyundai-Kia lineup. Below are its characteristics.
Characteristics
| Characteristic | Value |
|---|---|
| Manufacturing | Beijing Hyundai Motor Co. |
| Engine make | G4FG |
| Years of production | 2011 – present |
| Cylinder block material | aluminum |
| Power system | injector |
| Type | row |
| Number of cylinders | 4 |
| Valves per cylinder | 4 |
| Piston stroke, mm | 85.4 |
| Cylinder diameter, mm | 77 |
| Compression ratio | 10.5 |
| Engine displacement, cc | 1591 |
| Engine power, hp/rpm | 121 – 132 / 6200 – 6300 |
| Torque, Nm/rpm | 148 – 158 / 4850 |
| Environmental standards | Euro 4, Euro 5 |
| Engine weight, kg | ~100 |
| Fuel consumption, l/100 km | City: 8.0; Highway: 4.8; Mixed: 6.0 |
| Oil consumption, g/1000 km | up to 600 |
| Engine oil | 0W-40, 5W-30, 5W-40 |
| How much oil in the engine, liters | 3.6 |
| Oil change is carried out, km | 15,000 (7,500 recommended) |
| Engine operating temperature, °C | ~90 |
| Engine life, thousand km | Factory: 180; In practice: up to 300 |
| Tuning, hp | Potential: 140, Without loss of resource: 140 |
Installation on Cars
The G4FG engine has been used on a variety of Hyundai and Kia models, including popular models such as the Hyundai Accent, Kia Rio, Hyundai Elantra, and Kia Ceed, attesting to its reliability and popularity.
Service Regulations
| Service type | Periodicity, km | Commentary |
|---|---|---|
| Oil service | every 15,000 km (preferably 7,500) | Recommended oil 0W-30, 5W-30 |
| Lubricant volume in the engine, l | 3.7 | Approximately 3.3 liters are required for replacement |
| Transmission timing | chain | Service life is unlimited, in practice ~200,000 km |
| Valve thermal clearances | every 90,000 km | Adjustment by tappet selection |
| Clearances (intake/exhaust), mm | Inlet: 0.15-0.25; Exhaust: 0.20-0.30 | |
| Oil filter replacement | 15,000 km | |
| Air filter replacement | 45,000 km | |
| Fuel filter replacement | 60,000 km | |
| Spark plugs replacement | 60,000 km | |
| Auxiliary belt replacement | 120,000 km | |
| Coolant replacement | 8 years or 120,000 km |
Design and repair of the G4FG 1.6 engine
The Gamma II series motor called G4FG was created on the basis of the most popular G4FC and was designed to replace its predecessor in the future. Let’s compare and look at the differences between the G4FG and G4FC below.
The newer engine has the same aluminum cylinder block with an 85.4mm stroke crankshaft, and overall the bottom of the engine is exactly the same as on the G4FC, except for the pistons. Here are installed their own, slightly modified pistons. There are still no oil injectors, but the Gamma does well without them.
On top of the block is a modified head, it is the same 16-valve with two camshafts, but its distinctive feature is a system of changing the timing on both shafts Dual-CVVT – two phase shifters, simply put. The intake camshaft has also been replaced, and is now more aggressive. To allow the car to drive normally at low rpm, a new intake manifold with VIS length change system was installed on the intake. Shifts occur at 4200 rpm.
There are still no hydrocompensators here, so from time to time (every 90 thousand kilometers) you need to adjust the valves if necessary.
In addition, a new timing chain is used here, which traditionally serves quite well, not less than 200 thousand kilometers.
Injection remains the same – distributed MPI. The engine control unit differs from the last generation.
In addition to the related 1.6-liter G4FC, this motor has a number of other engines extremely close to it: G4FD, G4FJ, G4FA and even hybrid L4FC.
Disadvantages and Problems of G4FG Engines
Typical Breakdowns and Flaws of G4FG Engines
- Cylinder Scoring: A common problem caused by particles from a destroyed catalytic converter getting into the cylinders.
- Excessive oil consumption (oil glut): Can be caused by cylinder wall wear from overheating.
- Stretching of the timing chain: On earlier versions of the engine (before 2014), the timing chain had a short lifespan. Newer models have an improved bushing-roller chain.
- Small Problems: Low engine mount life, valve cover leaks, and speed fluctuations due to throttle valve fouling.
Despite the changes made, the basis of the motor remains the same and you still have the same G4FC or G4FA in front of you.
Their problems are absolutely no different from each other.
Here the main problem is a quick failure of the catalytic converter with ceramic crumbs getting into the cylinders – this is how scoring is formed in your G4FG, oil consumption appears and everything ends with a capital work.
Otherwise, nothing critical: the same foreign knocks and sounds (cold and hot), vibrations at idle and at 3000 rpm, alternator belt whistling and so on. Despite the large list, all this is not so terrible in practice.
Engine number. The block remained the same, accordingly, the site with the motor number remained in the same place – under the intake manifold, closer to the box.
Hyundai-Kia G4FG engine tuning
Chip tuning
This is the most evil motor from the whole Gamma line, so you can not use factory parts for tuning. You can only organize cold intake, remove the standard exhaust and weld a normal one in the form of a 4-2-1 manifold and a direct route with a diameter of 51 mm. Under this, as well as under the work without a catalyst, it is necessary to flash the control unit and in the end you will get for 140 hp.
You can go further and put camshafts Nuzhdin with plates, exhaust 63 mm with a manifold 4-1, adjust all this on a third-party ECU and spin for 8000 rpm, then the power will increase significantly.
MOTOR RATING: 4
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