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.
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) |
The engine was installed on:
- Hyundai Sonata 2 (Y2) in 1988 – 1993, Sonata 3 (Y3) in 1993 – 1998.
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.
Frequently asked questions about the Hyundai G4CM
How much power does the Hyundai G4CM make?
The Hyundai G4CM develops 90 - 100 hp and 135 - 145 Nm of torque.
How much oil does the Hyundai G4CM take and which one?
Engine oil capacity: 3.7 liters. Recommended oil: 10W-40.
Does the Hyundai G4CM have a timing belt or chain?
The Hyundai G4CM uses a timing belt.
Is the Hyundai G4CM turbocharged?
No, the Hyundai G4CM is naturally aspirated.
Does the Hyundai G4CM need valve clearance adjustment?
No, the Hyundai G4CM has hydraulic lifters, so the valve clearances do not need to be adjusted.
How long does the Hyundai G4CM last?
The typical lifespan of the Hyundai G4CM is ~300 000 km with proper maintenance.
What is the fuel consumption of the Hyundai G4CM?
Hyundai Sonata 1990: city 10.6, highway 6.4, combined 8.5 L/100 km.
What cars was the Hyundai G4CM installed on?
Hyundai Sonata 2 (Y2) in 1988 - 1993, Sonata 3 (Y3) in 1993 - 1998.
What are the common problems of the Hyundai G4CM?
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. All known problems.
