The 1.8-liter Opel Z18XER or 2H0 engine was manufactured in Hungary between 2005 and 2010 and was fitted to several of the company’s well-known vehicles, including the Astra, Vectra, Insignia, and Zafira. This power unit, designated F18D4, was fitted to European Chevrolet models.
The Z16SE, Z16XE, Z16XEP, Z16XER, and Z18XE engines are also part of the Z15 family.
The 1.8-liter engine for Opel models was one of the most well-liked models in the third generation of GM Family 1 gasoline engines, which made its debut in 2005. With distributed fuel injection, a cast-iron cylinder block, an aluminum 16-valve block head without hydraulic lifters, a timing belt drive, and DCVCP phase shifters on the intake and exhaust camshafts, the unit’s design is straightforward and typical of its era. An original geometry change system with a drum was installed in the engine intake manifold.
The tried-and-true hollow frame concept is the foundation of the Z18XER cylinder block. With a deep skirt that reduces wear and vibration, the gray cast iron offers a very sturdy base. A floating pin design is used by the pistons. Within the rod bushing and pin holes in the piston cylinder, the wrist pins that fasten the piston to the connecting rod “float.” Additionally, the pistons are oil-cooled. Every piston has a unique directional jet that sprays oil onto the skirt, adding a layer of lubricant to the cylinder wall and the piston’s bottom.
The engine was mounted on:
- Opel Astra H (A04) in 2006 – 2010;
- Opel Insignia A (G09) in 2008 – 2010;
- Opel Vectra C (Z02) in 2005 – 2008;
- Opel Zafira A (T98) in 2005 – 2010.
Specifications
| Production years | 2005-2010 |
| Displacement, cc | 1796 |
| Fuel system | distributed injection |
| Power output, hp | 140 |
| Torque output, Nm | 175 |
| Cylinder block | cast iron R4 |
| Block head | aluminum 16v |
| Cylinder bore, mm | 80.5 |
| Piston stroke, mm | 88.2 |
| Compression ratio | 10.5 |
| Hydraulic lifters | no |
| Timing drive | belt |
| Phase regulator | DCVCP |
| Turbocharging | no |
| Recommended engine oil | 5W-30 / 5W-40 / 0W-30 / 0W-40 |
| Engine oil capacity, liter | 4.5 |
| Fuel type | petrol |
| Euro standards | EURO 4 |
| Fuel consumption, L/100 km (for Opel Zafira 2007) — city — highway — combined |
9.9 6.0 7.4 |
| Engine lifespan, km | ~350 000 |
| Weight, kg | 120 |
Disadvantages of the Z18XER engine
Camshafts and phase regulators were a major marriage in the engines of the early years of production, but they have long since been replaced under warranty. The primary issue at hand is the phase control system’s electromagnetic valves jamming as a result of clogged strainers.
The oil heat exchanger in these engines is another weak point. Additionally, it flows in both directions: antifreeze gradually dilutes the lubricant, shortening the life of the oil pump and liners, and it transfers oil into the coolant.
The electrical component of this power unit is frequently the source of complaints, and when the engine ECU malfunctions, soldering its connectors is typically the only solution. Both the ignition coil module and the electronically operated thermostat malfunction.
The crankcase ventilation valve membrane causes a lot of problems for this motor; it just cracks, causing the engine to run erratically. Additionally, the head lacks hydraulic compensators, lubricant leaks frequently occur here, and the valves bend when the timing belt breaks.