Engine Audi ACK

The 2.8-liter 30-valve Audi ACK 2.8 V6 engine was assembled by the concern from 1995 to 1998 and was installed on such popular models as the A4 in the back of the B5, and also the A6 in the back of the C4 or C5. This motor has many analogues with minor differences, such as APR, AMX, AQD and ALG.

The EA835 series includes: ABC, AAH, ALF, BDV, ARE, ACK, ALG, BBJ, ASN.


Production years 1995-1998
Displacement, cc 2771
Fuel system injector
Power output, hp 193
Torque output, Nm 280
Cylinder block cast iron V6
Block head aluminum 30v
Cylinder bore, mm 82.5
Piston stroke, mm 86.4
Compression ratio 10.6
Features 2 x DOHC
Hydraulic lifters yes
Timing drive 2 chains & belt
Phase regulator hydraulic chain tensioner
Turbocharging no
Recommended engine oil 5W-30
Engine oil capacity, liter 5.5
Fuel type petrol
Euro standards EURO 2
Fuel consumption, L/100 km (for Audi A6 1996)
— city
— highway
— combined
Engine lifespan, km ~330 000

The engine was installed on:

  • Audi A4 B5 (8D) in 1996 – 1998;
  • Audi A6 C4 (4A) in 1995 – 1997; A6 C5 (4B) in 1997 – 1998;
  • Audi A8 D2 (4D) in 1996 – 1998;
  • Volkswagen Passat B5 (3B) in 1996 – 1998.

Disadvantages of the Audi ACK engine

  • This power unit is prone to oil and antifreeze leaks, especially after overheating;
  • Hydraulic lifters and chain tensioners do not tolerate bad lubricants;
  • Monitor the condition of the timing belt, if it breaks, the valves bend here in 100% of cases;
  • Many problems are caused by frequent contamination of the idle valve, throttle and crankcase ventilation;
  • At high mileage, the electrician begins to feverish: sensors, coils, lambda probe.

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