The Opel Z14XEP engine is a 1.4-liter 4-stroke naturally aspirated petrol engine of the second generation of the Ecotec Family 0 family, developed by Opel (then a subsidiary of GM). The engine was produced from 2003 to 2010.
The Z14XEP engine uses a lightweight cast iron cylinder block with a cast iron crankshaft and an aluminum overhead camshaft head with 2 chain drives (DOHC) and 4 valves per cylinder. This engine used TwinPort technology – dual intake ports with a throttle closing one of the ports at low revs, providing a strong air swirl for higher torque levels and better fuel economy. The engine uses ECU Bosch ME7.6.1 / Bosch ME7.6.2.
Specifications
| Manufacturer | Aspern engine plant |
| Also called | Z14XEP |
| Production years | 2003-2010 |
| Cylinder block alloy | cast iron |
| Fuel system | injector |
| Configuration | inline |
| Number of cylinders | 4 |
| Number of valves | 16 |
| Piston stroke, mm | 80.6 |
| Cylinder bore, mm | 73.4 |
| Compression ratio | 10.5 |
| Displacement, cc | 1364 |
| Power output, hp | 90/5600 |
| Torque output, Nm / rpm | 125/4000 |
| Fuel type | 95 |
| Euro standards | Euro 4 |
| Fuel consumption, L/100 km (for Opel Astra H) — city — highway — combined |
8.2 5.2 6.3 |
| Oil consumption, gr/1000 km | up to 600 |
| Recommended engine oil | 5W-30, 5W-40 |
| Engine oil capacity, liter | 3.5 |
| Oil change interval, km | 15000 |
| Normal engine operating temperature, °C | 90-95 |
| Firing order | 1-3-4-2 |
Explanation of Z12XEP marking
- Z – Euro 4 engine;
- 14 – 1.4 liters;
- X – Compression ratio from 10 to 11.5: 1;
- E – multi-point fuel injection system;
- P – increased power.
Frequent problems
- The biggest problem here is the constantly stuck Twinport dampers;
- a single-row timing chain can stretch and start rattling on a run up to 150,000 km;
- the reason for floating revolutions and a drop in thrust is most often in a clogged EGR valve;
- the source of the lubricant leak is usually the oil pressure sensor and the valve cover;
- oil pump, thermostat and ECU control unit have a low resource here.
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