BMW 8 series 2018 3.0 petrol description
Cabrio BMW 840i xDrive is being produced from January, 2018. It has six-cylinder petrol engine with displacement of 3.0 litres, which produces power of 340 horsepower on 5000 rpm and torque 500 Nm (Newton metres) on 1600 revolutions per minute.
This 6-cylinder 24-valve engine camshaft is driven by chain (What is an engine chain and belt? ). Engine has fuel injection system and Twin-Scroll turbine. The engine meets the Euro 6 emissions standard. Average engine life expectancy (mileage before serious repairs are needed) is from 210 000 to 360 000 kilometres. It is important to remember that engine life is highly dependent on regular maintenance and the quality of the oils and fuels used.
More engine specs
The B58 engine, compared to its predecessor, features a 20% increase in boost pressure, a closed-deck cylinder block design, an increased compression ratio of 11.0:1, and a slightly larger displacement of 2998 cc, up from 2979 cc, with an additional weight of 8 ...
This BMW 8 series 3.0 engine oil type is 0W-20, 0W-30, 5W-30 and oil capacity is 6.5 litres.
BMW 840i xDrive has all four wheel drive (AWD, 4x4) and automatic gearbox with 8 gears.
BMW 840i xDrive accelerates to speed 100 kilometres per hour in 4.9 seconds. The maximum speed of this car is 250 km/h.
The fuel consumption of this BMW 840i xDrive in combined mode (combining urban and highway driving) is 7.8 litres per 100km (12.8 km/l), fuel consumption in city - 9.8 l/100km, highway fuel economy - 6.7 l/100km. Fuel tank capacity is 68 litres or 17.97 gallons, which gives a mileage up to 860 kilometers without refueling in urban cycle and even up to 1000 kilometers on highway.
BMW 840i xDrive technical data
| Model: | BMW 840i xDrive | ||
|---|---|---|---|
| Body style: | Cabrio | ||
| Production period: | 2018. January | ||
| Engine: | 2998 cm3 Petrol, 6 cylinders | CO2 emissions: | no data |
| Power: | 340 HP ON 5000 RPM | Torque: | 500 NM ON 1600 RPM |
| Gearbox: | Automatic gearbox (8 gears) | Drive type: | All wheel drive (AWD, 4x4) |
| Maximum speed: | 250 km/h | Acceleration 0-100 km/h: | 4.9 seconds |
| Fuel consumption (l/100km): | 7.8 (combined) 9.8 (urban) 6.7 (highway) | ||
| Fuel tank capacity: | 68 litres (18 gallons) | ||
| Car dimensions: | 4.84m (length) 1.90m (width) 1.34m (height) | ||
| Turning diameter: | 11.9 meters | ||
| Trunk capacity: | 350 litres | ||
| Gross weight: | 2400 kg | ||
BMW 840i xDrive engine B58B30M1
Engine reliability and common problems:
The B58 engine, compared to its predecessor, features a 20% increase in boost pressure, a closed-deck cylinder block design, an increased compression ratio of 11.0:1, and a slightly larger displacement of 2998 cc, up from 2979 cc, with an additional weight of 8 kg. Despite its advancements, the engine has several common issues.Coolant leaks are frequently reported, often linked to a drop in coolant levels without an obvious cause. In some cases, replacing the expansion tank cap resolves the issue. Head gasket failure is another recurring problem due to the engine's high operating temperatures. Symptoms include a strong smell of burning oil and sometimes visible smoke. Oil leaks are also common, originating from areas such as the oil filter housing, oil cooler, or head gasket. Prompt repairs are crucial to prevent oil starvation and potential engine damage.
The B58, like many direct-injection engines, often experiences carbon buildup on intake valves, leading to fluctuating idle and reduced performance. Less frequently, issues arise with the VANOS system, responsible for variable valve timing. Symptoms include power loss, uneven idle, stalling, and high fuel consumption. VANOS problems typically appear around 80,000–100,000 km. Oil filter disintegration is another concern, with parts of the filter sometimes breaking off and getting stuck in the housing. This can lead to oil leaks and other complications, often caused by low-quality filters or improper replacement.
Additionally, valve cover gaskets are prone to leaks, with symptoms such as the smell of burning oil, smoke, or low oil level warnings. Plastic valve covers can also crack over time. These issues usually arise between 60,000 and 100,000 km. Some BMW G-series models produced before 2021 may encounter failures in the oil pump due to a design flaw in the internal bushing. The recommended solution is upgrading to the sixth revision oil pump with a metal component.
Overall, while the B58 engine is a significant improvement in performance and efficiency, these known issues highlight the importance of regular maintenance, timely repairs, and the use of high-quality parts to ensure reliability.
Overall, this engine can last around 210,000 to 360,000 km if properly maintained, using the correct quality oil and fuel, and carrying out regular checks and maintenance.
The engine has hydraulic valve tappets (lifters), which provide quieter operation and do not require periodic adjustment, but are more complex in design and can cause serious engine damage in the event of failure.
| Engine displacement | 2998 cm3 |
|---|---|
| Number of cylinders | 6 |
| Bore (cylinder diameter) | 82 mm |
| Stroke length (piston move) | 94.6 mm |
| Compression ratio | 11 : 1 |
| Camshaft drive | Timing chain Chain motors are considered more reliable, chain replacement usually is required less often than a timing belt, but they are often louder and vibrate more. |
| Fuel system | Injection |
| BMW 840i xDrive oil type | 0W-20, 0W-30, 5W-30 |
| Oil capacity | 6.5 litres (6.9 quarts) |
| Power | 333 - 340 HP ON 5000 RPM |
| Torque | 450 - 500 NM ON 1600 RPM |
| Start of production (year) | 2018 |
| Duration of production | 7 years |
Often in the first years of production, engines tend to have various constructive problems, so it is recommended to choose a car with this engine from 2021 onwards. |
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| Engine also used on | BMW 5 sērija BMW 7 sērija BMW 6 sērija |
Generally, the use of an engine in several models and its long production run is an indication of the quality of the engine and the success of its design. |
Most often compared to
All BMW 8 series cabrio [2018 modifications
| Modification | Engine | Power | Consumption |
|---|---|---|---|
|
BMW 840i 4x4
Jan 2018 — Dec 2020 Most fuel efficient petrol version |
3.0 Petrol | 340 HP | 7.5 l/100km |
| BMW 840i xDrive 4x4 | 3.0 Petrol | 340 HP | 7.8 l/100km |
| BMW 840d xDrive 4x4 Jan 2018 — Dec 2020 | 3.0 Diesel | 320 HP | 6.3 l/100km |
|
BMW M850i xDrive 4x4
Jan 2018 — Dec 2022 Most dynamic version - 100 km/h in 3.9 seconds |
4.4 Petrol | 530 HP | 10.0 l/100km |