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.
Specifications
| 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 |
12.4 7.1 9.2 |
| 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.
