Characteristics
| Characteristics | Value |
|---|---|
| Manufacturing | Ulsan Plant |
| Engine brand | Sirius |
| Years of manufacture | 1986-2005 |
| Cylinder block material | cast iron |
| Power system | injector |
| Type | row |
| Number of cylinders | 4 |
| Valves per cylinder | 2, 4 |
| Piston stroke, mm | 88 |
| Cylinder diameter, mm | 85 |
| Compression ratio | 8.6, 9.0 |
| Engine displacement, cc | 1997 |
| Engine power, hp/rpm | 95/4900, 102/5000, 105/5000, 111/5000, 115/5000, 120/5000, 125/5800, 137/6000, 139/5800, 146/6000 |
| Torque, Nm/rpm | 157/2400, 159/4000, 162/2400, 170/4000, 181/4500, 159/3500, 169/4600, 179/4600, 179/4000, 192/4000 |
| Fuel | 92 |
| Environmental standards | up to Euro 2 |
| Engine weight, kg | ~160 |
| Fuel consumption, l/100 km | (for Sonata) |
| – city 12.7 | |
| – highway 7.3 | |
| – mixed. 9.3 | |
| Oil consumption, gr./1000 km | to 1000 |
| Oil in the engine | 0W-40, 5W-30, 5W-40, 5W-50, 10W-30, 10W-40, 10W-50, 10W-60, 15W-50 |
| How much oil in the engine, liters | 4.0 |
| Oil change is carried out, km | 7000-10000 |
| Engine life, thousand kilometers | in practice 400+ |
| Tuning, hp | potential 200++ |
| The engine was installed on | Hyundai Sonata, Hyundai Grandeur, Hyundai Santamo, Hyundai Stellar, KIA Joice |
The Sirius engine was produced at Ulsan Plant from 1986 to 2005. This inline four-cylinder unit with cast iron cylinder block has an injection system.
The Sirius engine was offered with two options of valves per cylinder: 2 and 4. The piston stroke is 88 mm and the cylinder diameter is 85 mm. The compression ratio of the motor varies from 8.6 to 9.0.
The engine displacement is 1997 cubic centimeters. The power output of the engine varies in a wide range, starting from 95 horsepower and reaching 146 horsepower. Torque ranges from 157 Nm to 192 Nm.
It is recommended to use fuel with an octane number of 92 for engine operation. The environmental standards correspond to the level up to Euro 2. The weight of the engine is approximately 160 kg.
Fuel consumption of the Sirius engine for the Sonata is 12.7 liters per 100 km in the city, 7.3 liters per 100 km on the highway and 9.3 liters per 100 km in mixed mode. Oil consumption does not exceed 1000 grams per 1000 km.
Recommended oil types for the engine: 0W-40, 5W-30, 5W-40, 5W-50, 10W-30, 10W-40, 10W-50, 10W-60, 15W-50. It is necessary to use 4 liters of oil in the engine. It is recommended to change the oil every 7000-10000 km.
The resource of the Sirius engine, according to the factory, is not specified, but in practice it can reach more than 400 thousand kilometers. There is no information about the tuning potential.
Sirius engine was installed on Hyundai Sonata, Hyundai Grandeur, Hyundai Santamo, Hyundai Stellar and KIA Joice cars.
Reliability, problems and repair of the G4CP engine
We will talk about the engine, which is a licensed version of the first generation 4G63 and belongs to the Sirius series. This motor uses a 229mm high cast iron cylinder block with balancer shafts. Inside the block is a crankshaft with a piston stroke of 88mm, the pistons are 85mm in diameter and the connecting rods are 150mm long, providing a total displacement of 2 liters. Although the oil pump is slightly different, it is not crucial.
The block is fitted with an aluminum 8-valve head with a single camshaft and hydrocompensators, eliminating the need for periodic valve adjustment. The shaft drive is belt driven and is located on the right side of the engine. The recommended belt replacement period is 90k km according to the manual, but it is recommended to change it every 60k km.
There was also a 16-valve version with DOHC head, designated as G4CP-D, differing by the corresponding head, attachments and control unit. Such motors were a copy of the 4G63 DOHC 6 bolt motor.
The main differences between the South Korean copy and the Japanese motor can be found by the valve cover, which has slight differences.
Although the Korean version did not have turbo versions, there were many other related modifications of different displacements: the most famous among them is the 2.4-liter Hyundai G4CS, as well as 1.8-liter G4CN and G4CM, and even 1.6-liter G4CR.
Production of this classic motor continued for quite some time, but Hyundai gradually switched to the G4JP starting in 1998.
Problems and shortcomings of the Hyundai G4CP 2.0 liter engine
This engine has the same problems as its Japanese counterpart:
- Vibrations caused by a defect in the left engine cushion or other causes.
- Swimming idle speeds caused by a dirty throttle, idle regulator or injectors.
Problems due to using cheap oil can also occur, such as balancer shaft belt breakage and subsequent timing belt failure, as well as hydrocompensator problems, etc.
Regular maintenance and use of quality oil will ensure long and trouble-free operation. Usually, the life of the G4CP engine is very high and is not less than 300 thousand kilometers, and often more than 400 thousand kilometers.