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BMW B48 Engine For Sale

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    It is a 2-liter 4- cylinder engine that, at least initially, simply runs alongside the equivalent N20 unit, and then gradually replaces it. The B48 engine becomes part of a larger family of new modular engines, which also includes 3 and 6-cylinder units, both petrol and diesel, all united by the fact that they have a large number of components in common, so to reduce production costs. For example, just to mention the most remarkable aspect, both the B48 engine and the other engines have the same unit displacement, equal to 498.8 cm³. The only exception is the cheaper variant of the three-cylinder petrol engine, with 1.2 liters of displacement. It is also interesting that the engine B48 is adaptable to any schema supercharging by the turbocharger. And so, a normal, twin-scroll, twin- turbo or tri-turbo turbocharger can be mounted on this engine without major adjustments. The turbocharger can also be of the fixed or variable geometry type.

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    These are the characteristics of the B48 engine:

    4-cylinder in-line architecture ;
    base in the aluminum alloy ;
    bore and stroke: 82×94.6 mm;
    displacement: 1998 cm³ ;
    distribution of doubling overhead axis camshaft ;
    cylinder head with four valves per cylinder;
    phase variation through bi-VANOS and Valvetronic systems ;
    direct injection power ;
    turbocharging by turbocharger ;
    compression ratio : 11: 1;
    crankshaft on five main bearings.
    Starting from July 2020, this engine, in all its variants, gradually began to be equipped with micro-hybrid technology on all its applications. The first car to be fitted with this was the 5 Series G30 during the mid-life restyling.

    Common BMW B48 Engine Problems

    The BMW B48 engine is a 2.0L four-cylinder engine manufactured by the German automaker BMW AG in their Munich plant. The B48 engine has been used in various models of the 3 Series (E90/E91), 5 Series (F10/F11), and six series (G11).

    The B48 engines are all petrol units with turbocharging, direct injection, and variable valve timing technology. They are based on an aluminum block with cast-iron cylinder liners for improved thermal stability. This design results in lower oil consumption than other comparable engines because it has no pushrods or hydraulic lifters that would typically require more frequent oil changes due to wear. The B48s have a higher output than the older N46 engine.

    They come in different versions depending on their application, including twin-scroll turbochargers (in some models), Valvetronic (F10/5 Series), and single-VANOS (some variants). The B48 engine has a lightweight aluminum front cover with an integrated oil cooler to maintain optimal coolant temperature while saving weight. It also allows for more efficient packaging due to the compact design of the cylinder head components – which uses smaller air ducts connected to an intercooler mounted directly behind the intake manifold. The result is shorter airflow paths and reduced pumping losses compared with conventional systems.

    Here we list common BMW b48 engine problems and their cause:

    • Coolant leak. This can be due to a leaking head gasket, the most common problem with this engine. The symptoms include white smoke from the exhaust pipe or steam inside your car once it has been running for some time, combined with coolant loss. This issue may also result in engine oil mixing with coolant – leading to a milky appearance of the cooling system if mixed;
      How to resolve: Do not ignore coolant loss as this will cause severe damage to the engine, including warping of the cylinders and head.
    • Camshaft timing sensor failure (N20/B48). Our technicians tell us that a lousy camshaft timing sensor may affect engine performance, such as rough idle and hesitation on acceleration. In most cases, there are no adverse effects on fuel economy. This fault may only be detected during routine maintenance – when the belt is removed for inspection;
      How to resolve this issue is very easy, but replacing the sensor could lead to expensive labor costs if it is not an easy access part. You can resolve the problem by replacing the crankshaft sensor;
    • Valve cover gasket leakage (B48). Diagnosis may reveal oil drips underneath the engine and on the exhaust system. The effects include oil contaminating the spark plugs, resulting in misfiring or starting difficulties.
      How to resolve: The valve cover gasket may need to be replaced.
    • Fuel pump issues (N20/B48). We’ve heard reports of the fuel pump failing in these engines. Symptoms include hard starting or stalling when idling, combined with check engine light illumination;
      How to resolve: Diagnosis may reveal no signs of power reaching the fuel pump. Please have your car checked as soon as possible to avoid being stranded with a faulty fuel pump;
    • Spark plug issues (N20/B48). Spark plugs may need replacing every 40,000 miles or so on this engine. Symptoms include misfiring or starting difficulties, combined with the illumination of the check engine light. Spark plugs are easy to replace, so this is a relatively inexpensive repair;
      How to resolve: Please have your car checked as soon as possible to avoid being stranded with faulty spark plugs or wires.
    • Valve cover gasket leakage (B48). Diagnosis may reveal oil drips underneath the engine and on the exhaust system. The effects include oil contaminating the spark plugs, resulting in misfiring or starting difficulties.
      How to resolve: The valve cover gasket may need to be replaced.

    Conclusion:

    There are many common BMW b48 engine problems. Ignoring these issues may lead to damage to the vehicle, including overheating, misfiring, or starting difficulties.

    If you drive a BMW series, especially model F10/F11/F07/F01 and so on, and your car threw up one or more of these error codes: P0087, P0113, P1297… Stop driving it! Do not even risk getting stuck by the side of the road somewhere. Your car might be beyond repair already, and you could get yourself into a considerable amount of debt. Get professional help as soon as possible if this is your case – do not just read about these errors online and think, “oh, I’ll go to a mechanic next week,” because you might end up paying more for repairs than you would have paid if you’d just went to the doctor early.

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