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.
Specifications
| 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 |
14.2 8.0 9.9 |
| 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.
