The 1.8-liter Hyundai G4CM engine was produced from 1988 to 1998 under license from Mitsubishi, because structurally it was a copy of the popular Japanese company engine with the 4G62 index. This SOHC engine is primarily known as the base powertrain of the Sonata Y2 and Y3 models.
Sirius family: 1.6 L – G4CR; 1.8 L – G4CN, G4CM, G4JN; 2.0 L – G4CP, G4JP; 2.4 L – G4JS, G4CS.
The engine was installed on:
- Hyundai Sonata 2 (Y2) in 1988 – 1993; Sonata 3 (Y3) in 1993 – 1998.
Specifications
| Production years | 1988-1998 |
| Displacement, cc | 1795 |
| Fuel system | injector |
| Power output, hp | 90 – 100 |
| Torque output, Nm | 135 – 145 |
| Cylinder block | cast iron R4 |
| Block head | aluminum 8v |
| Cylinder bore, mm | 80.6 |
| Piston stroke, mm | 88 |
| Compression ratio | 8.8 – 8.9 |
| Features | no |
| Hydraulic lifters | yes |
| Timing drive | belt |
| Phase regulator | no |
| Turbocharging | no |
| Recommended engine oil | 10W-40 |
| Engine oil capacity, liter | 3.7 |
| Fuel type | petrol |
| Euro standards | EURO 1/2 |
| Fuel consumption, L/100 km (for Hyundai Sonata 1990) — city — highway — combined |
10.6 6.4 8.5 |
| Engine lifespan, km | ~300 000 |
| Weight, kg | 149.1 (without attachments) |
Disadvantages of the Hyundai G4CM engine
- A strong clatter under the hood is a sign of failure of the hydraulic lifters;
- Vibration of the power unit indicates critical wear of one of the engine mounts;
- Floating engine speeds are often caused by contamination of the injectors, throttle and idle speed controller;
- However, these are all trifles, the main thing here is to monitor the condition of the belts: timing and balancers;
- After all, the breakage of any of them almost always turns into a meeting of pistons with valves.