Engine G4GC: characteristics, description, tuning.

In this article we consider the G4GC engine, its technical characteristics, possible malfunctions, we will give examples of possible tuning.

Description and transcript

The engine of this brand has 4 cylinders and operates in a four-cycle mode. The cylinder block is smelted from cast iron. The head of the block is made of aluminum alloy.

Gas distributing mechanism of the engine G4GC(GRM) consists of 16 valves and has two overhead camshafts, in addition there is a CVVT phase change system, which is located on the exhaust shaft. The timing belt starts its work from the belt drive, the belt itself is to be replaced every 60,000 kilometers. This is done to prevent its breakage.

The engine brand G4GC stands for:

• G - type of fuel;
• 4 - number of cylinders;
• G - motor family (in our case Betta, there is also Gamma);
• C - the volume of the engine (Gamma - 1.6, Betta - 2.0).

Specifications

Specifications of the G4GC engine:

• Production and year of production - Ulsan plant, 2002.
• The volume is 1975 cubic centimeters.
• Power - from 137 to 143 liters. from. (6 thousand revolutions per minute).
• The power supply system is an injector.
• ГРМ - 16 clans for 4 cylinders.
• The fuel is AI-92.
• The volume of engine oil and brand - 4 liters, 10W-30, 10W-40 (semisynthetic).
• Fuel consumption (based on l / 100 km): the city - 9.3, the route - 7.1, the mixed - 5.9.
• Engine resource according to the manufacturer - 300 000 km.
• The ecological standard is Euro-4.

The G4GC brand is installed on KIA cars of such modifications as Cerato, Ceed, Spectra, Sportage, Carens. Also, another automotive brand uses engine G4GC - Hyundai. This motor is installed on the following car brands from this manufacturer: Elantra, i20, Solaris, i30.

Possible tuning of the engine installed on the KIA

In order to increase engine power, you can resort to the following methods:

1. Calibration of the engine. It is possible to increase the power from the starting 140 to 150 horsepower. Without a competent specialist, you should not try this method.
2. You can try installing a direct-flow exhaust("Spider 4-2-1") and add shafts with phase 268/264 or camshafts from the G4GM engine with a large valve lift, the volume of which is 1.8, then the engine power will increase to 160 horsepower.
3. If finance allows, then you can makeorder camshafts with phase 270 with high lift. You have to weld the turbo collector and provide oil to the turbine, the diameter of the exhaust pipe should be 53 or 61 millimeters. The following elements will also be needed: injectors brand 440 s, intercooler, piping. Power will grow significantly - up to 180 horsepower. How much is enough for this motor is another matter.

Maintenance

Replacing the engine oil in the G4GC engineit is necessary to carry out every 15,000 kilometers, and under heavy operating conditions, at the recommendation of the plant, every 7500. This procedure should be carried out on a hot engine, also replace the fuel, oil and air filters.

Replacing the coolant (coolant) is necessaryproduce in the event that the antifreeze has changed its natural color to red and covered with oily film or there are other changes in its original form. In the KIA brand replacement, the coolant must be replaced by a cold engine, after which the motor must be warmed up and the amount of liquid in the expansion tank must be checked, making sure there are no air plugs. If necessary, top up the liquid.

Possible malfunctions, their causes and elimination

In the G4GC engine, the following faults occur most often:

1. Unstable operation of the engine in mode"acceleration-inhibition" and at idle. The problem can be in the candle, the ignition coil, or it is the result of a breakdown of high-voltage wires. In all cases, you need to change the defective item.
2. Turns hang. Most likely, the reason lies in the incorrect firmware of the electronic control unit (ECU), even a factory defect is possible. In this case, you need to go to the SRT and rebuild the computer, it's best to do it on a certified service station.
3. Strong engine vibration at idling speed. The reason is the contamination of the spark plugs or throttle. There is nothing difficult to repair: just clean these items.
4. If the engine knocks, it means that the gaps in the timing valves are incorrectly adjusted - it will not be superfluous to go to the SRT.
5. A pronounced whistle when the motor works indicates that the generator belt is loose, it is necessary to change the tension roller.
6. If the engine speed is floating, most likely, the reason lies in the contamination.