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.
|Manufacturer||Aspern engine plant|
|Cylinder block alloy||cast iron|
|Number of cylinders||4|
|Number of valves||16|
|Piston stroke, mm||80.6|
|Cylinder bore, mm||73.4|
|Power output, hp||90/5600|
|Torque output, Nm / rpm||125/4000|
|Euro standards||Euro 4|
|Fuel consumption, L/100 km (for Opel Astra H)
|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|
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.
- 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.