Engine Volvo B5252S

The 2.5-liter 10-valve Volvo B5252S engine was assembled in Sweden from 1994 to 1999 and was installed on many popular models of the company of its time, such as the 850, S70 or V70. There was a version of this engine with a catalyst B5252FS and a gas modification GB5252S.

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 1994 – 1996;
  • Volvo S70 I (874) in 1996 – 1999;
  • Volvo V70 I (875) in 1996 – 1999.


Production years 1994-1999
Displacement, cc 2435
Fuel system injector
Power output, hp 144
Torque output, Nm 206
Cylinder block aluminum R5
Block head aluminum 10v
Cylinder bore, mm 83
Piston stroke, mm 90
Compression ratio 10.0
Features DOHC
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 S70 1998)
— city
— highway
— combined
Engine lifespan, km ~400 000

Disadvantages of the B5252S engine

  • This unit does not have a phase regulator and an electronic choke and is therefore reliable.
  • The most famous problem is the oil burner due to clogged crankcase ventilation.
  • It is important to monitor the condition of the timing belt, since when it breaks, the valves usually bend.
  • Quite often, the rear crankshaft oil seal and the oil pump gasket are leaking here.
  • The engine mounts, water pump and fuel pump also have a modest resource here.

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