Z20LER engine — Opel 2.0 (2L)
2L · 200 hp
Engine overview
Vehicles with this engine
Factory specifications
Values from the manufacturer documentation for this engine.
Engine (general)
| Engine code | Z 20 LER |
| Capacity | 1998 cc |
| Idle speed | 700 - 900 rpm |
| Normal | 11.0 - 14.0 bar |
| Differential limit between cylinders | < 1.0 bar |
| Max. compression loss between cylinders | 25 % |
| Oil pressure | 1.8 - 2.6 bar/rpm |
Engine (petrol)
| Fuel system (make and type) | Bosch Motronic ME7.6.2 |
| Number of cylinders | 4 |
| Firing order | 1-3-4-2 |
| Spark plugs (make and type) | Bosch FQR8LE2 |
| Spark plug gap | 0.9 - 1.1 mm |
| Injection pressure/system pressure | 3.3 bar |
| CO at fast-idle speed | 0.2 % |
| Fast-idle speed | 2800 - 3200 rpm |
| Lambda change (Delta Lambda) | 0.97 - 1.03 |
| Oil temperature during test | 80 °C |
| Closed-loop test at: | 700 - 900 rpm |
| Conditioning catalytic converter | 0.5 min |
| Lambda | 0.97 – 1.03 |
Cooling system
| Thermostat opens at | 92 °C |
Capacities
| Engine sump, incl. filter | 4.25 l |
| Manual transmission | M32 |
| Gearbox refill | 2.4 l |
| Cooling system | 7.7 l |
| Air-conditioner refrigerant | 500 (-> 2005) 475 (2006 ->) g |
| Air-conditioner compressor oil | 150 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 ° |
| Oil filter | 15 Nm |
| Spark plugs | 25 Nm |
| Knock sensor | 20 Nm |
| Oil plug | 10 Nm |
| Oxygen sensor | 40 Nm |
| Wheel bolts | 110 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.
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.