Engine Volvo B6294S

The 2.9-liter Volvo B6294S gasoline engine was produced by the company from 1998 to 2001 and was installed only on the S80 model before restyling, especially many of these cars from the USA. This power unit is essentially just an updated version of the well-known B6304S motor.

The 6-cylinder Modular engine family includes: B6284T, B6294T and B6304S.

The engine was installed on:

  • Volvo S80 I (184) in 1998 – 2001.


Production years 1998-2001
Displacement, cc 2922
Fuel system injector
Power output, hp 204
Torque output, Nm 280
Cylinder block aluminum R6
Block head aluminum 24v
Cylinder bore, mm 83
Piston stroke, mm 90
Compression ratio 10.5
Features DOHC
Hydraulic lifters yes
Timing drive belt
Phase regulator at the intake
Turbocharging no
Recommended engine oil 5W-30
Engine oil capacity, liter 6.9
Fuel type petrol
Euro standards EURO 3
Fuel consumption, L/100 km (for Volvo S80 2000)
— city
— highway
— combined
Engine lifespan, km ~330 000

Disadvantages of the B6294S engine

  • The bulk of the problems are delivered by the whimsical electric choke from Magneti Marelli;
  • In second place according to complaints are oil leaks from the phase control system;
  • Lubrication consumption due to clogged crankcase ventilation is also very common here;
  • It is necessary to monitor the condition of the timing belt, since when it breaks, the valves bend;
  • Weaknesses also include engine mounts, thermostat, pump and fuel pump.

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