C3G-702 engine — Renault 1.2 (1.2L)
1.2L · 54 hp
Engine overview
Vehicles with this engine
Factory specifications
Values from the manufacturer documentation for this engine.
Engine (general)
| Engine code | C3G-702 |
| Capacity | 1238 cc |
| Idle speed | 700 ± 50 rpm |
| Inlet | 0.15 mm |
| Exhaust | 0.20 mm |
| Normal | 11.5 - 12.5 bar |
| Oil pressure | 3.5/4000 bar/rpm |
Engine (petrol)
| Fuel system (make and type) | Magneti Marelli |
| Number of cylinders | 4 |
| Firing order | 1-3-4-2 |
| Ignition coil resistance, primary | 0.45 ohms |
| Ignition coil resistance, secondary | 4800 ohms |
| Spark plugs (make and type) | Bosch W9DC |
| Spark plug gap | 0.9 mm |
| Injection pressure/system pressure | 1.0 - 1.1 bar |
| CO exhaust gas | < 0.3 % |
| CO2 | 14.5 - 16.0 % |
| HC | 100 ppm |
| O2 | 0.1 - 0.5 % |
| Lambda | 0.97 - 1.03 |
| Lambda change (Delta Lambda) | 0.03 |
| Oil temperature during test | 80 °C |
| Fast-idle speed | 2500-2800 rpm |
| CO at fast-idle speed | < 0.3 % |
| Closed-loop test at: | 400-2000 rpm |
Cooling system
| Cap pressure | 1.2 bar |
| Thermostat opens at | 89 °C |
Electrical
| Battery | 40 Ah |
| Alternator | 50 A |
Capacities
| Engine sump, incl. filter | 3.5 l |
| Manual transmission | JB1 |
| Gearbox refill | 3.4 l |
| Cooling system | 5.5 l |
| Air-conditioner refrigerant | 650 ± 35 g |
| Air-conditioner compressor oil | 135 ± 10 ml |
Torque settings
| Cylinder head bolts — Stage 1 | 20 Nm |
| Cylinder head bolts — Stage 2 | 90 ± 4 ° |
| Cylinder head bolts — Stage 5 | 20 ° |
| Cylinder head bolts — Stage 6 | 90 ± 4 ° |
| Spark plugs | 25 - 30 Nm |
| Front hub | 280 Nm |
| Rear hub | 170 Nm |
| Wheel bolts | 90 Nm |
Workshop procedures for this engine
Step-by-step procedures from the workshop database.
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Get free diagnosis →Who makes these pages, and how
TorqFix was built by a mechanic — after a 2,700 km drive with five roadside repairs that no diagnostic tool could explain.
The figures on this page come from manufacturer workshop documentation and are shown as they are. The page is assembled automatically from that data — it is not written by an AI. The AI works in the chat, where it answers for your specific car. It writes nothing here.
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The story behind TorqFix →Workshop data on this page last updated 22 Aug 2026.