C20SEL engine — Opel 2.0 (2L)
2L · 136 hp
Engine overview
Vehicles with this engine
Factory specifications
Values from the manufacturer documentation for this engine.
Engine (general)
| Engine code | C 20 SEL |
| Capacity | 1998 cc |
| Idle speed | 752 rpm |
| Automatic | 816 rpm |
| Normal | 12-15 bar |
| Differential limit between cylinders | 1 bar |
| Oil pressure | 2.5 / 752 bar/rpm |
Engine (petrol)
| Fuel system (make and type) | Simtec 56.5 |
| Number of cylinders | 4 |
| Firing order | 1-3-4-2 |
| Spark plugs (make and type) | Bosch FR8LDC Bosch FR8LDC4 |
| Spark plug gap | 0.7 - 0.9 mm |
| Injection pressure/system pressure | 0.76 bar |
| CO2 | > 12 % |
| HC | < 100 ppm |
| CO at fast-idle speed | < 0.3 % |
| Fast-idle speed | 2800 - 3200 rpm |
| Lambda | 0.97 - 1.03 |
| Oil temperature during test | 80 °C |
| Closed-loop test at: | 2000 - 2300 rpm |
| CO exhaust gas | < 0.5 % |
Cooling system
| Cap pressure | 1.2-1.5 bar |
| Thermostat opens at | 92 °C |
| Fan on at | 100 °C |
Electrical
| Battery | 44 Ah |
| Alternator | 70 A |
Capacities
| Engine sump, incl. filter | 4.5 l |
| Gearbox refill | 1.9 l |
| Gearbox refill | 3.0 - 3.5 l |
| Cooling system | 7.1 - 7.2 l |
| Air-conditioner refrigerant | 900 g |
| Air-conditioner compressor oil | 295 ml |
Torque settings
| Cylinder head bolts — Stage 1 | 25 Nm |
| Cylinder head bolts — Stage 2 | 90° ° |
| Cylinder head bolts — Stage 3 | 90° ° |
| Cylinder head bolts — Stage 4 | 90° ° |
| Cylinder head bolts — Stage 5 | 15° ° |
| Spark plugs | 25 Nm |
| Oxygen sensor | 30 Nm |
| Oil plug | 45 Nm |
| Knock sensor | 20 Nm |
| Starter motor | 25 Nm |
| Alternator | 35 Nm |
| Wheel bearing unit to hub | 50 Nm + 30° + 15° Nm |
| Wheel nuts | 110 Nm |
Emissions
| Emission code | 70/220*1996/69 |
| Emission standard | Euro 2 |
| CO2 average | 202 - 209 g/km |
| CO | 0.017 - 0.269 g/km |
| HC NOx | 0.086 - 0.334 g/km |
| CO2 average | 224 - 226 g/km |
| CO | 0.058 - 0.115 g/km |
| HC NOx | 0.138 - 0.239 g/km |
| CO2 average | 204 - 212 g/km |
| CO2 average | 231 - 233 g/km |
| CO2 average | 226 - 228 g/km |
Workshop procedures for this engine
Step-by-step procedures from the workshop database.
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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.
Variants of the same model differ. Cross-check torque against the factory manual for your engine before final tightening.
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The story behind TorqFix →Workshop data on this page last updated 22 Aug 2026.