Engine Opel Z18XER / Z18XER

Engine Opel Z18XER / A18XER

The Opel Z18XER is a 1.8-liter inline 4-cylinder 4-stroke naturally aspirated gasoline engine produced from 2005 to 2010 at Plant Szentgotthard in Hungary.

The Opel Z18XER engine uses a gray cast iron crankshaft block with five bearings and an aluminum head with double camshafts (DOHC) and four valves per cylinder (16 valves in total). The engine is equipped with a sequential fuel injection system, dual variable variable phasing (DCVCP) and an electronic ignition system.

The Z18XER cylinder block is based on the proven hollow frame concept. The gray cast iron provides an extremely strong base, optimized with a deep skirt that minimizes both wear and vibration. The pistons adopt a floating pin design. The wrist pins that attach the piston to the connecting rod “float” within the rod bushing and the pin holes in the piston cylinder. The pistons are also oil cooled. Each piston has its own individual directional jet, which sprays oil onto the skirt, covering the bottom of the piston and the cylinder wall with an additional layer of lubricant.

The A18XER is, in principle, the same 1.8-liter Opel engine as the Z18XER, only strangled to comply with the Euro 5 environmental class. Unlike low-volume engines, this 1.8-liter engine uses a variable-length receiver, which gives this unit some advantages. This ICE uses a reliable timing belt with replacement intervals of 150,000 km. The engine is not equipped with a USR system, which is rather a plus.


Manufacturer Plant Szentgotthard
Also called A18XER/Z18XER
Production years 2005
Cylinder block alloy cast iron
Fuel system injector
Configuration inline
Number of cylinders 4
Valves per cylinder 4
Piston stroke, mm 88.2
Cylinder bore, mm 80.5
Compression ratio 10.5
Displacement, cc 1796
Power output, hp 140/6300
Torque output, Nm / rpm 175/3800
Fuel type 95
Euro standards Euro 5/4
Weight, kg 118
Fuel consumption, L/100 km
— city
— highway
— combined
Oil consumption 0,6 L/1000 km
Recommended engine oil 5W-30 / 5W-40 / 0W-30 / 0W-40
Engine oil capacity, liter 4.5
Oil change interval, km 15000
7500 (in the city)
Engine lifespan, km
— official information
— real


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