B18F engine — Volvo 1.7 (1.7L)
1.7L · 95-120 hp
Engine overview
Factory specifications
Values from the manufacturer documentation for this engine.
Engine (general)
| Engine code | B 18 F |
| Capacity | 1721 cc |
| Idle speed | 750 - 850 rpm |
| Inlet | 0.20 ± 0.05 mm |
| Exhaust | 0.40 ± 0.05 mm |
| Normal | 11 - 13 bar |
| Oil pressure | 2/1000 3.5/3000 bar/rpm |
| Engine code | B18F |
Engine (petrol)
| Fuel system (make and type) | Bosch LH-Jetronic 2.2 |
| Number of cylinders | 4 |
| Firing order | 1-3-4-2 |
| Timing stroboscopic (before TDC) | 8 ± 3/800 °/rpm |
| Ignition coil resistance, primary | 0.5-1.5 ohms |
| Ignition coil resistance, secondary | 3000-7000 ohms |
| Spark plugs (make and type) | Bosch WR7DC |
| Spark plug gap | 0.7 mm |
| Injection pressure/system pressure | 3.0-3.2 bar |
| CO exhaust gas | 0.6 ± 0.2 % |
| CO2 | 14.5 - 16.0 % |
| HC | 100 ppm |
| O2 | 0.1 - 0.5 % |
| Lambda | 0.97 - 1.03 |
| Oil temperature during test | 70 °C |
| Fast-idle speed | 2400 - 2600 rpm |
| CO at fast-idle speed | < 0.3 % |
| CO exhaust gas | < 0.5 % |
| Lambda change (Delta Lambda) | 0.03 |
Cooling system
| Cap pressure | 1.5 bar |
| Thermostat opens at | 89 - 104 °C |
| Stage 1/Fan 1 | 95 °C |
| Stage 2/Fan 2 | 101 °C |
| Thermostat opens at | 89 °C |
Electrical
| Battery | 55 Ah |
| Alternator | 60 A |
Capacities
| Engine sump, incl. filter | 5.3 l |
| Gearbox refill | 3.4 l |
| Automatic transmission | ZF 4 HP 14 Q |
| Gearbox refill | 3.3 l |
| Cooling system | 6.5 l |
| Engine sump, incl. filter | (- 1992): 5.3 (1993): 5.0 l |
Torque settings
| Cylinder head bolts — Stage 1 | 30 Nm |
| Cylinder head bolts — Stage 2 | 70 Nm |
| Cylinder head bolts — Stage 5 | 20 Nm |
| Cylinder head bolts — Stage 6 | 123 ± 2 ° |
| Front hub | 230 Nm |
| Rear hub | 220 Nm |
| Wheel nuts | 110 Nm |
| Spark plugs | 25 Nm |
| Cylinder head bolts — Stage 4 | 360 ° |
| Cylinder head bolts — Stage 6 | 125 ° |
| Rear hub | 180 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.