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.

Specifications