Engine Volkswagen 1Z

The 1.9-liter VW 1Z 1.9 TDI diesel engine was produced by the concern from 1991 to 1997 and was installed in many cars of the German company, but is better known for the Passat B4 model. After a slight upgrade, this power unit received a completely different AHU index.

The EA180 series also includes: 1Z, AFN, AHF, AHU, ALH, AVG, AKU, AEY.

Specifications

Production years 1991-1997
Displacement, cc 1896
Fuel system direct injection
Power output, hp 90
Torque output, Nm 202
Cylinder block cast iron R4
Block head aluminum 8v
Cylinder bore, mm 79.5
Piston stroke, mm 95.5
Compression ratio 19.5
Features SOHC
Hydraulic lifters yes
Timing drive belt
Phase regulator no
Turbocharging yes
Recommended engine oil 5W-40
Engine oil capacity, liter 4.3
Fuel type diesel
Euro standards EURO 2
Fuel consumption, L/100 km (for VW Passat 1995)
— city
— highway
— combined
6.7
4.1
5.3
Engine lifespan, km ~450 000

The engine was installed on:

  • Audi 80 B4 (8C) in 1991 – 1995;
  • Audi A4 B5 (8D) in 1995 – 1996;
  • Audi A6 C4 (4A) in 1994 – 1996;
  • Seat Cordoba 1 (6K) in 1995 – 1996;
  • Seat Ibiza 2 (6K) in 1995 – 1996;
  • Seat Toledo 1 (1L) in 1995 – 1996;
  • Volkswagen Caddy 2 (9K) in 1995 – 1996;
  • Volkswagen Golf 3 (1H) in 1993 – 1996;
  • Volkswagen Passat B4 (3A) in 1993 – 1997;
  • Volkswagen Sharan 1 (7M) in 1995 – 1996;
  • Volkswagen Vento 1 (1H) in 1993 – 1996.

Disadvantages of the Volkswagen 1Z engine

  • This is a very reliable motor and breakdowns happen only at very high mileage;
  • The main problem is valve seat burnout and, as a result, loss of compression;
  • Look for the cause of failures in thrust in the turbine control system, mass air flow sensor, EGR valve;
  • The culprit for the oil leak here is most often the bursting lower flange of the crankcase ventilation tube;
  • The ribbed belt due to a breakdown of its roller sometimes gets into the timing and the end of the motor.

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