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.
R6 2.8-3.0 L Volvo Modular family: B6284T, B6294S, B6294T, B6304S.
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 |
| Weight, kg | 175 |
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.
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.
Frequently asked questions about the Volvo B6304S
How much power does the Volvo B6304S make?
The Volvo B6304S develops 204 hp and 267 Nm of torque.
How much oil does the Volvo B6304S take and which one?
Engine oil capacity: 5.8 liters. Recommended oil: 5W-40.
Does the Volvo B6304S have a timing belt or chain?
The Volvo B6304S uses a timing belt.
Is the Volvo B6304S turbocharged?
No, the Volvo B6304S is naturally aspirated.
Does the Volvo B6304S need valve clearance adjustment?
No, the Volvo B6304S has hydraulic lifters, so the valve clearances do not need to be adjusted.
How long does the Volvo B6304S last?
The typical lifespan of the Volvo B6304S is ~350 000 km with proper maintenance.
What is the fuel consumption of the Volvo B6304S?
Volvo 960 1994: city 16.5, highway 8.4, combined 11.1 L/100 km.
What cars was the Volvo B6304S 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.
What are the common problems of the Volvo B6304S?
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. All known problems.
