Engine Opel C18NZ

The 1.8-liter Opel C18NZ engine was assembled from 1988 to 1995 at an enterprise in Germany and was installed on the two most popular models of the Astra and Vectra concern, and for another year on the Kadett. The unit is not related to the C14NZ / C16NZ motors, but is a smaller version of the C20NE.

The C10 line also includes engines: C14NZ and C16NZ.

The engine was installed on:

  • Opel Astra F (T92) in 1991 – 1994;
  • Opel Kadett E (T85) in 1990 – 1991;
  • Opel Vectra A (J89) in 1988 – 1995.


Production years 1988-1995
Displacement, cc 1796
Fuel system single injection
Power output, hp 90
Torque output, Nm 145
Cylinder block cast iron R4
Block head aluminum 8v
Cylinder bore, mm 84.8
Piston stroke, mm 79.5
Compression ratio 9.2
Features no
Hydraulic lifters yes
Timing drive belt
Phase regulator no
Turbocharging no
Recommended engine oil 5W-30
Engine oil capacity, liter 4.0
Fuel type petrol
Euro standards EURO 1
Fuel consumption, L/100 km (for Opel Vectra 1994)
— city
— highway
— combined
Engine lifespan, km ~330 000
Weight, kg 130

Disadvantages of the C18NZ engine

  • This engine has no pronounced weaknesses, all its problems are from old age;
  • Most often, failures occur in the ignition system or some sensors are buggy;
  • The timing belt does not have a very large resource, but when it breaks, the valves do not bend;
  • If you use low-quality oil, then closer to 100,000 km, hydraulic lifters will knock.

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