The Volkswagen AZ 1.9 TD 1.9-liter diesel engine was manufactured between 1991 and 1998 and was found in a number of the company’s models; however, it is most well-known for the Passat B3 and B4. These diesel engines gave German automobiles a reputation for being tough and modest.
JK, JP, JX, SB, 1X, 1Y, AAZ, and ABL are also included in the EA086 series.
Specifications
| Production years | 1991-1998 |
| Displacement, cc | 1896 |
| Fuel system | prechambers |
| Power output, hp | 75 |
| Torque output, Nm | 140 – 150 |
| Cylinder block | cast iron R4 |
| Block head | aluminum 8v |
| Cylinder bore, mm | 79.5 |
| Piston stroke, mm | 95.5 |
| Compression ratio | 22.5 |
| Features | SOHC |
| Hydraulic lifters | yes |
| Timing drive | belt |
| Phase regulator | no |
| Turbocharging | yes |
| Recommended engine oil | 5W-30 |
| Engine oil capacity, liter | 4.3 |
| Fuel type | diesel |
| Euro standards | EURO 1/2 |
| Fuel consumption, L/100 km (for VW Passat 1992) — city — highway — combined |
7.6 4.7 6.5 |
| Engine lifespan, km | ~450 000 |
The engine was installed on:
- Audi 80 B4 (8C) in 1991 – 1995;
- Seat Cordoba 1 (6K) in 1993 – 1997;
- Seat Ibiza 2 (6K) in 1993 – 1996;
- Seat Toledo 1 (1L) in 1991 – 1997;
- Volkswagen Golf 3 (1H) in 1991 – 1997;
- Volkswagen Passat B3 (31) in 1991 – 1993; Passat B4 (3A) in 1993 – 1997;
- Volkswagen Vento 1 (1H) in 1992 – 1998.
Disadvantages of the VW AAZ engine
Above all, the cylinder head of this diesel engine frequently cracks because it fears overheating;
Regular fuel leaks via injection pump gaskets rank second in terms of mass.
Regulations state that the timing belt must be replaced every 60,000 kilometers or the valves will bend if it breaks.
Lubricant is frequently driven by the turbine after 200–250 thousand kilometers.
The primary drawback of these motors is their age; the secondary market is completely dead.