This power unit of the Alpha series from a South Korean company was installed on a new Accent model. The G4EC engine fully justified the manufacturer's expectations, rarely deteriorated and was reliably operated until the end of its service life.
It has been serially installed on Hyundai since 1999. It was installed on countless variations of the Accent, but since 2003 it has only been installed on versions for the markets of developing countries. The manufacturer guarantees the trouble-free operation of the internal combustion engine for 100 thousand km or 7 years of active operation.
Engine features are shown below.
The petrol "four" has two camshafts located on top of the cylinder head. One of them controls the operation of the intake valves, the second - the exhaust.
The motor is fixed on several flexible pillows under the hood of the car. Half of the supports are attached to the gearbox, the rest - directly to the motor.
The crankshaft is five-bearing, made of durable cast iron. 8 counterweights are molded together with the shaft. They reliably balance the element, eliminate vibrations during the working cycle. In addition, it is the counterweights that center the crankshaft, helping to better tune the engine during repairs.
Valve adjustment is not required on this engine. Hydraulic compensators are responsible for this function, everything happens automatically.
The oil system holds 3.3 liters of oil. The manufacturer recommends pouring 10W-30, and the owners recommend Mannol 5W-30 synthetics. As for gasoline, you can fill in the usual 92nd, but without unnecessary additives.
Engine power is 101 hp. With.
The usual layout of parts that work together with the engine.
On the right side of the G4EC, elements such as intake valves, power steering, air conditioning compressor found a place.
On the reverse side of the internal combustion engine is a thermostat, ignition coils.
An oil indicator, various pressure gauges, a generator, an oil filter are installed in the front.
At the back, a throttle assembly, an injection rail with injectors and a starter were found.
The upper compartment is closed with a plastic cover with wells in which the spark plugs are located.
The cylinder block of the engine is cast iron, it includes cylinders, oil channels, and a cooling device. From below, 5 main bearing supports, equipped with removable covers, are firmly attached to the BC.
Weaknesses of G4EC
The G4EC engine is generally reliable, but like any other unit that runs constantly under load, it begins to cause problems over time. Consider the most vulnerable places of this motor.
The cylinder head gasket needs to be replaced.
The timing belt requires periodic inspection and adjustment.
The air conditioning compressor has a belt drive, which also needs to be adjusted. If the tension is weak, extraneous noise occurs, and if the tension is too high, the bearing collapses.
Most often, the following problems occur.
Interruptions and unstable work on the XX. At operating speeds, the engine loses power, consumes more fuel than before. As a rule, these signs indicate problems with the injector or fuel pump. Also not an exception are spark plugs that do not provide a good spark.
Uncharacteristic exhaust noise at idle. The sounds are uneven, multi-tone, with small or large pauses of silence. Symptoms indicate clogged injectors, faulty spark plugs.
Zhor oil. It occurs due to the occurrence of piston rings.
Strong vibrations. As a rule, this indicates wear on the engine mounts.
RPM float may be caused by a malfunction of the control unit. Flashing the BU will help.
Rarely occurs before the 100,000th run. However, everything is possible, especially with such gasoline and oil as we have in our country. There are known cases of overhaul on the G4EC engine, which has driven only 10,000 km.
What do they do in this case.
Open the cylinder head.
The honing is checked to ensure that there are no severe scuffs on the walls. The gasket, if the internal combustion engine has overheated, is stuck.
They test the state of the head itself so that nothing leads anywhere. Valves are checked for leakage and burnout. In most cases, a decision is made to replace the valve stem seals.
Check the piston group of the engine. On a knocked-in engine, broken or cracked piston rings are not uncommon. On G4EC this happens more often with 2 and 4 pots. Piston skirts also wear out, which is inevitable on a lightweight G4EC engine. On this one, the connecting rods are thin, without a proper margin of safety.
The oil drain holes are checked - they function or not. If yes, then the oil was filled in on time, there is no danger here.
Connecting rod bearings are inspected. Again, on a lighter internal combustion engine, wear is stronger here. Along the axis of rotation, the connecting rod is centered with the crankshaft journal. This provides protection for the connecting rod bearings. On the other hand, the presence of hydraulic lifters adversely affects the condition of thin-walled connecting rods.
The valves are checked, if everything is fine, then a decision is made to carry out grinding. All valves are polished with a drill to a shine, but care must be taken not to touch the chamfers. The valves themselves are expensive - a piece goes for 500 rubles. You can use any high-quality lapping paste, for example, Don Deal.
After that, the head is assembled. You can clean the combustion chamber with kerosene.
The oil filter deserves special attention on this internal combustion engine. It is full-flow, equipped with a real ventilation system of channels. Actively participates in the distillation of oil: first, the pump pumps out the lubricant from the crankcase, from where the liquid goes through the filter to the supply line. Then the oil enters the cylinder head and onto the camshafts. It goes to the valve lifters and bearings. At the end, the lubricant, passing through the drainage holes, descends again to the sump, thereby completing the circulation through the system.