The 3.0-liter 24-valve Volvo B6304S engine was assembled by the company from 1990 to 1999 and was installed on the popular 960 model in Europe and the similar S90 sedan and V90 station wagon. Modifications of this motor with a catalyst were known under the indices B6304F and B6304FS.
The 6-cylinder Modular engine family includes: B6284T, B6294S and B6294T.
The engine was installed on:
- Volvo 960 in 1990 – 1996;
- Volvo S80 I (184) in 1998 – 1999;
- Volvo S90 I (964) in 1996 – 1998;
- Volvo V90 I (235) in 1996 – 1998.
Specifications
| Production years | 1990-1999 |
| Displacement, cc | 2922 |
| Fuel system | injector |
| Power output, hp | 204 |
| Torque output, Nm | 267 |
| Cylinder block | aluminum R6 |
| Block head | aluminum 24v |
| Cylinder bore, mm | 83 |
| Piston stroke, mm | 90 |
| Compression ratio | 10.7 |
| Features | DOHC |
| Hydraulic lifters | yes |
| Timing drive | belt |
| Phase regulator | no |
| Turbocharging | no |
| Recommended engine oil | 5W-40 |
| Engine oil capacity, liter | 5.8 |
| Fuel type | petrol |
| Euro standards | EURO 2 |
| Fuel consumption, L/100 km (for Volvo 960 1994) — city — highway — combined |
16.5 8.4 11.1 |
| Engine lifespan, km | ~350 000 |
Disadvantages of the B6304S engine
- This unit does not have a phase regulator and an electronic choke and is therefore reliable;
- In specialized forums, oil consumption due to clogged crankcase ventilation is most often discussed;
- Also, lubricant leaks often occur here, especially from the rear crankshaft oil seal;
- Carefully monitor the condition of the timing belt, because when it breaks, the valves bend;
- The engine mounts, water pump and fuel pump are distinguished by a low resource.
