B230A engine — Volvo 2.3 (2.3L)
2.3L · 110 hp
Engine overview
Vehicles with this engine
Factory specifications
Values from the manufacturer documentation for this engine.
Engine (general)
| Engine code | B230A |
| Capacity | 2316 cc |
| Idle speed | 900 rpm |
| Inlet | 0.35 - 0.40 mm |
| Exhaust | 0.35 - 0.40 mm |
| Normal | 9 bar |
| Oil pressure | 2.5 - 6.0/2000 bar/rpm |
Engine (petrol)
| Fuel system (make and type) | Pierburg 175 CDUS |
| Number of cylinders | 4 |
| Firing order | 1-3-4-2 |
| Timing stroboscopic (before TDC) | 5/750 °/rpm |
| Start | 0/105 - 145 °/mmHg |
| End | 5/165 - 210 °/mmHg |
| Start | 0/450 - 630 °/rpm |
| End | 10/500 - 1750 °/rpm |
| Ignition coil resistance, primary | 0.6 - 0.8 ohms |
| Ignition coil resistance, secondary | 6900 - 8500 ohms |
| Spark plugs (make and type) | Bosch W7DC |
| Spark plug gap | 0.7 - 0.8 mm |
| Fuel pump pressure | 0.15 - 0.27 bar |
| CO exhaust gas | 0.5 - 1.5 % |
| CO2 | 13 - 16 % |
| HC | 300 ppm |
| O2 | 0.5 - 2.0 % |
| Oil temperature during test | 70 °C |
| Fast-idle speed | 2400 - 2600 rpm |
| CO at fast-idle speed | < 1.0 % |
| Conditioning catalytic converter | 2 / 3000 min/rpm |
Cooling system
| Cap pressure | 0.65 - 0.85 bar |
| Thermostat opens at | 87 - 97 92 - 102 °C |
Electrical
| Battery | 60 Ah |
| Alternator | 55 A |
Capacities
| Engine sump, incl. filter | 3.85 l |
| Gearbox refill | M40: 0.8 M45: 0.8 M41: 1.6 M46: 2.3 M47 (- 1987): 1.3 M47 (1987 -): 1.6 l |
| Differential | 1.6 l |
| Gearbox refill | AW70: 7.4 AW71: 7.4 BW55: 3.5 l |
| Cooling system | 9.5 l |
Torque settings
| Cylinder head bolts — Stage 1 | 60 Nm |
| Cylinder head bolts — Stage 2 | 110 Nm |
| Cylinder head bolts — Stage 3 | T = 80°C |
| Cylinder head bolts — Stage 4 | t = 30 min |
| Cylinder head bolts — Stage 5 | -90° ° |
| Cylinder head bolts — Stage 6 | 110 Nm |
| Cylinder head bolts — Stage 1 | 20 Nm |
| Cylinder head bolts — Stage 2 | 60 Nm |
| Cylinder head bolts — Stage 3 | +90° ° |
| Wheel nuts | 115 Nm |
| Spark plugs | 25 ± 5 Nm |
Workshop procedures for this engine
Step-by-step procedures from the workshop database.
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TorqFix was built by a mechanic — after a 2,700 km drive with five roadside repairs that no diagnostic tool could explain.
The figures on this page come from manufacturer workshop documentation and are shown as they are. The page is assembled automatically from that data — it is not written by an AI. The AI works in the chat, where it answers for your specific car. It writes nothing here.
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The story behind TorqFix →Workshop data on this page last updated 22 Aug 2026.