Engine Volvo B5254S

The 2.5-liter 20-valve Volvo B5254S engine was assembled by the company from 1991 to 1999 and installed on such popular models of the Swedish concern as 850, C70, S70 or V70. The modification of this motor with a catalytic converter had a different index B5254FS.

The 5-cylinder 2.5-liter Modular engine family includes: B5252S, B5254S, B5254T, B5254T2, B5254T3, B5254T4, B5254T6.

The engine was installed on:

  • Volvo 850 in 1991 – 1996;
  • Volvo C70 I (872) in 1998 – 1999;
  • Volvo S70 I (874) in 1996 – 1999;
  • Volvo V70 I (875) in 1996 – 1999.


Production years 1991-1999
Displacement, cc 2435
Fuel system injector
Power output, hp 165 – 170
Torque output, Nm 210 – 220
Cylinder block aluminum R5
Block head aluminum 20v
Cylinder bore, mm 83
Piston stroke, mm 90
Compression ratio 10.3 – 10.5
Features V-VIS until 1996
Hydraulic lifters yes
Timing drive belt
Phase regulator no
Turbocharging no
Recommended engine oil 5W-40
Engine oil capacity, liter 5.3
Fuel type petrol
Euro standards EURO 2
Fuel consumption, L/100 km (for Volvo 850 1996)
— city
— highway
— combined
Engine lifespan, km ~400 000

Disadvantages of the B5254S engine

  • Until 1996, there was a capricious V-VIS system in the intake, but then it was abandoned;
  • Otherwise, it is a very reliable unit, which is famous only for lubrication leaks;
  • More often than others, the rear crankshaft oil seal and the oil pump gasket are leaking here;
  • According to the regulations, the timing belt changes every 75,000 km, or if it breaks, the valves will bend;
  • Engine mounts, pump, fuel pump, hydraulic lifters have a low resource.

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