Engine Volkswagen ADZ

The 1.8-liter Volkswagen ADZ 8v engine was produced by the concern from 1994 to 1999 and was installed on the third generation of the popular Golf, Passat B4 and a number of cars from Seat. This mono-injection power unit is essentially an updated version of the ABS motor.

The EA827 1.8l series includes: RP, AAM, ABS, ADZ, PF, ADR, ARG, AEB, ANB.


Production years 1994-1999
Displacement, cc 1781
Fuel system single injection
Power output, hp 90
Torque output, Nm 145
Cylinder block cast iron R4
Block head aluminum 8v
Cylinder bore, mm 81
Piston stroke, mm 86.4
Compression ratio 10.0
Features SOHC
Hydraulic lifters yes
Timing drive belt
Phase regulator no
Turbocharging no
Recommended engine oil 5W-40
Engine oil capacity, liter 3.8
Fuel type petrol
Euro standards EURO 1
Fuel consumption, L/100 km (for VW Passat B4 1995)
— city
— highway
— combined
Engine lifespan, km ~320 000

The engine was installed on:

  • Volkswagen Golf 3 (1H) in 1994 – 1999;
  • Volkswagen Passat B4 (3A) in 1994 – 1996;
  • Volkswagen Polo 3 (6N) in 1997 – 1999;
  • Volkswagen Vento 1 (1H) in 1994 – 1998;
  • Seat Cordoba 1 (6K) in 1994 – 1999;
  • Seat Ibiza 2 (6K) in 1994 – 1996;
  • Seat Toledo 1 (1L) in 1994 – 1999.

Disadvantages of the VW ADZ engine

  • The main problems for owners are caused by failures in the operation of the mono-injection system.
  • Regularly here you have to deal with leaks of lubricant or coolant.
  • Due to throttle contamination or air leaks, engine speed often floats.
  • More often than others, the lambda probe and the antifreeze temperature sensor fail here.
  • By 200,000 km, rings or caps usually wear out and oil consumption appears.

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