In 1995, Hyundai was able to establish production of their own gasoline engines. Previously, they installed internal combustion engines from Mitsubishi.
Power units of Beta family are among the first own developments of the Korean company. These are quite classic in-line fours with the volume of 1.6 – 2.0 liters. Hyundai engineers did not hide that they were inspired by Japanese engines.
The cylinder block is made of cast iron, 16-valve cylinder heads. The finalized versions, which were produced after 2001, finally have phase shifters. In the timing drive – toothed belt, which connects with the crankshaft only the exhaust camshaft. But the intake camshaft is already driven by a chain from the exhaust camshaft.
Today we will talk about the engine 2.0 G4GF, which was produced between 1995 and 2001. You can see it on Hyundai Elantra and Coupe. Other modifications of this engine were produced up to 2012 and you can see them on the vast majority of Kia and Hyundai, also it is a standard power unit for the first generation Tucson.
Main characteristics of the engine
The table below summarizes the main technical characteristics of the Hyundai G4GF engine:
| Characteristic | Value |
|---|---|
| Exact volume | 1975 cm³ |
| Power system | Distributed injection |
| Engine power | 139 hp |
| Torque | 182 Nm |
| Cylinder block | Cast-iron, in-line (R4) |
| Cylinder head | Aluminum, 16 valves |
| Cylinder diameter | 82 mm |
| Piston stroke | 93.5 mm |
| Compression ratio | 10.3 |
| Engine features | DOHC (dual camshaft) |
| Hydrocompensators | Yes |
| Transmission timing | Belt and chain |
| Phase adjuster availability | No |
| Turbocharging | No |
| Fuel type | AI-92 |
| Ecological class | Euro 2 |
| Example service life | 330,000 km |
| Dry weight | 144 kg |
Oil and Maintenance
To keep the Hyundai G4GF engine in good condition, it is recommended to use engine oil with a viscosity of 5W-40. The volume of oil required for oil change is 4.0 liters. Regular maintenance and oil changes can extend the life of the engine and ensure its reliable operation.
A few words about the reliability of G4GF
The motor considered today is as simple and uncomplicated as possible. Mechanically, there are no special problems, and serious breakdowns threaten only with unskilled service, saving on oil and installation of the cheapest consumables.
Oil leaks
The valve cover is made of plastic, so it is sealed around the perimeter with a rubber gasket, which is sure to harden with time. The spark plug wells are separately sealed with rubber rings. The semicircular holes at the back opposite the camshafts are also sealed separately. Seals rarely live to 100 thousand. Good, they are cheap and change them is not difficult, thus eliminating all leaks from under the valve cover.
Sometimes you can encounter leaks on the front oil seal of the crankshaft.
Crankshaft position sensor
The crankshaft position sensor often fails. This can be recognized by an unsure start of the engine.
Throttle valve
The throttle valve of the engine under consideration today works in tandem with the idle speed regulator. Due to the accumulation of soot and soot on these nodes, the engine begins to run unsteadily at idle. Thankfully, all dirt is easily removed with a carburetor cleaner. Before you start cleaning, you will need to buy new gaskets, on which the damper and regulator are placed.
Speaking of which, we do not recommend that you disassemble the regulator, because it is very difficult to adjust it, because of which the idle speed will become floating, or overestimated.
At the same time, we advise you to clean the absolute pressure sensor, it is also quite quickly overgrown with a thick layer of oil vapor.
Ignition coil
The G4GF engine has two dual ignition coils, which are connected to the plugs with high-voltage wires. To check the secondary winding, you will need to measure the resistance in pairs in outputs 1 and 2, 3 and 4. The resulting value should be in the neighborhood of 13 ohms.
And the resistance of the primary winding is measured at the low-voltage connector, and it should be minimal.
Ignition coils are famous for their long service life. Yes, problems with the ignition system happen, manifested by ignition skipping. Most often these symptoms appear in wet and cold weather. If there are skips – will have to the entire ignition system, first of all check the high-voltage wires. It also does not hurt to clean the absolute pressure sensor.
Oil separator
The throttle and intake manifold are quickly covered with a layer of oil due to a drop in the performance of the oil separator, which is located in the valve cover. This should be cleaned in good time. Note that you will need to remove the valve cover plate to gain full access to the oil separator. It is strongly recommended to clean it at least once every 50 thousand, as well as when replacing the cover gaskets.
Before you start cleaning the oil separator, buy a new crankcase ventilation valve, you will also need a couple of tubes through which the inlet and valve cover are connected. Their cost is small, and replacement will solve the problems with the separation of oil vapors from the gases.
The timing belt
We already said at the very beginning that the belt drives exclusively the camshaft. There is a separate belt for the cooling system pump, which also drives the alternator.
The timing belt will need to be changed every 60 thousand. Installation marks can be seen on the pulleys of the camshaft and crankshaft.
Timing belt failure is the main reason why these reliable motors fail and are sent for overhaul.
GBZ
In the valve train of the 2.0-liter power unit, as well as its 1.8-liter variety, there are no hydrocompensators. Thermal clearances are adjusted with calibrated washers. It is recommended to check them every 100 thousand, if necessary – adjust, good, it is not so difficult.
Inlet valve clearances are 0.2 mm and exhaust valve clearances are 0.28; ± 3 hundredths.
Intake camshaft chain
This chain lasts almost forever. In practice, it is rarely changed, especially if the camshafts are in perfect condition.