BMW N62B48 engine

One of the three strongest giants of German automakers, BMW AG is famous for its premium cars. Reliable and durable engines of this brand are characterized by a very wide range and will appeal to any sophisticated owner. From the turbo 3-cylinder B38, 4-cylinder M10-M40 and N20/B48, 6-row M20/M50 and N54/N55 to the first-class V8 M60-N63 and V12 models for the leading series. Power units designed both for the city and more sporty versions are produced, along with gasoline, diesel, atmospheric and turbocharged are produced.Everyone can buy a car based on the preferred modification, version and configuration of the engine.In Russia and the CIS, the Bavarian BMW models have not been neglected either.

The N62 replaced the previous M62 engine model. In the newest category NG (New Generation) four varieties of power unit of different cubic capacity were produced. The main changes affected the mechanics of the motor, VANOS gas distribution mechanism, a new control system of the unit. As a result, fuel costs have been reduced, performance has been increased, and the engine’s audibility and torque have been improved. The N62 eight-row unit was installed in BMW 5,6,7 series and X5 crossovers.

From 2001 to 2005, the power unit of the first variety N62B36 was used. Its main advantages were increased torque, cubic capacity and performance due to increased piston stroke. From 2005 to 2010, a 4-liter version of the 8-cylinder injector engine N62B40 was produced. Placed the crankshaft in the cylinder block, reduced piston stroke and cylinder bore, redesigned exhaust valves and combustion chambers, 2-stage intake manifold with corrected length size and Bosch engine management system. BMW 540i series cars used the N62B40.

N62B48 engine specifications

Advantages

The BMW N62B48 engine, which was released in 2003, is the best fourth variant of the N62. It replaced the M62B46 and is also an improved version of the N62B44. The cylinder block was modified by increasing the cylinder cross section of the pistons to 93 mm, a steel crankshaft with a piston stroke of 88.3 mm was introduced, new connecting rod designs were used, combustion chambers and exhaust ducts were modified for the new large-caliber exhaust manifold, and an updated intake manifold with a 2-stage DISA length change system was introduced. The cylinder head incorporates silumin. N62B48 is formed by a 6-speed automatic transmission. Since due to the aversion of electronic equipment to mechanics, the motor resource decreased by 2 times. Electronic firmware Bosch DME helps to prevent loss of power and achieve high performance with underestimated heat generation at various revolutions and loads. The VIN code of the motor can be found on the sides under the front top cover.The final variation of the atmospheric V8 from BMW with an injector power system, cylinder displacement of 4799 cubic centimeters, equal to 4.8 liters.

N62B48 is also subdivided into two subcategories, which differ from each other in torque speed (500 Nm /3500 rpm and 490 Nm/3400 rpm) and engine performance in hp (360 hp and 367 hp).Recommended for use gasoline 95-Euro-4 and engine oil from the manufacturer brand 5W 30-40. Average fuel consumption per 100 kilometers is 16.9 liters in the city and 8.3 liters on the highway. The cost of lubricants on average per 1000 kilometers will be about 1 liter. Regularity of replacement of 5W-30-40 engine oil every 7000 kilometers will help to prevent excessive use.

Even with constant heavy use, the engine will not cause any problems for the owner until the end of the mandatory maintenance under warranty. Pain points of the N62B48 motor will reveal themselves closer to 80,000 km. Special attention should be paid to it when the term of overhaul is approaching. Otherwise, careless attitude will affect the condition of the automatic transmission and will result in expensive repairs.Coordinated operation of the automatic transmission and electronic fuel supply system reduces stress on all structural units of the motor, confirming its endurance, and provides great popularity of the motor.

Produced for the BMW 50i and X5 series. The N62B48 power unit has been replaced by the new generation BMW N63 engine with direct injection and turbocharger.

A bit about the disadvantages of the BMW N62B48 engine.

Since all motors N62 by their composition and characteristics are similar to each other, the main headache of BMW owners is the failure of valve seals.Also worry car owners failure of the Valvetronic system and VANOS phase change. In cars with this type of internal combustion engine there are “personnel” with long idle times, with the difficulty of fitting and ring wear.

A list of major difficulties:

1.Floating RPMs

If there are initial signs of insufficient engine traction, it is necessary to inspect structural units. The source may be the engine decompression mechanism and air suction, ignition coil breakdown. Diagnostics of ignition coils every 100000 km, will prevent the problem of floating revolutions. And in case of damage to the oil rings, they just need to be replaced. Also to eliminate the problem of “floating revolutions” it is necessary to check the serviceability of the flow meter and Valvetronic device.

2.Oil Leak

Timely inspection and replacement of the alternator housing gasket or crankshaft oil seal will prevent such difficulties as “engine oil leakage”. If you use analogs of crankshaft oil seals, they should be replaced more often than original consumables.

3.Excessive oil consumption

The issue of engine oil over consumption is solved by changing oil caps and all components of the oil pipeline every 100000 km, otherwise you may encounter leakage failure of the main oil pipe connections and complete wear of oil caps.

It is better to immediately put new original oil-resistant rings, as they are of higher quality and will last longer than analogs.

4.Increased fuel consumption

Fuel consumption increases due to the collapse of the catalytic converters. Getting the honeycomb of collapsed catalysts into the cylinders will be the consequence of all sorts of scratches. The first signs will be piston scuffing, it starts to curve and hit the top point. With scuffing, of course, you can drive, but not for a long time, because you will have to buy a new motor, as the price of repair will be high.  This shortcoming will be solved by replacing catalytic converters with flame arrester when buying a car. And passing maintenance at the dealer, with the extension of the warranty, treatment with composition against wear and scuffing NT-10 after timely diagnostics by AGC method will help to avoid it.

If you treat the car with care, change engine oil in time and only the recommended by the manufacturer, regularly undergo maintenance and change spare parts in time, you can easily increase the engine life up to 400 000 km and postpone the moment of engine overhaul.

Preventive inspection of the power unit can be carried out independently, but maintenance and repair is better to be carried out in a specialized service.

Power increase

Every car owner would like to get additional power from the engine and feel instant results. At the same time, he believes that there will be no consequences. If you always warm up the turbine after a cold start and idle for the initial 500 meters, it will not damage it. But the fact is that due to continuous load operation and ignorant use, the thermal capacity of the pistons will be depleted and the turbine will fail. The most common way to increase performance by 20-25 horsepower is to install an ESS compressor. The car owner can get up to 420-450 horsepower at maximum compressor pressure, but the price of this upgrade will also be a significant difference.

If you do decide to install a compressor, there are some things to consider to maximize power properly. The ESS must have an unchanged discharge mode, especially for the N62B48. When installing, it is advisable to keep the original stock CPG and replace the exhaust with a sportier-looking model. Then replace the electrical firmware, as well as adjust the ignition and fuel delivery system to the updated motor data. The advantage of installing a compressor includes an increase in power to 100 hp, the motor does not require rework, its potential is held at medium boost. Also important is the ease of dismantling and the quickness of the work.

The disadvantages are the difficulty of finding used parts and spare parts for the next repair. Also, sometimes the qualification of mechanics does not allow to install the compressor correctly. It is better not to take risks and go straight to a service center, possibly spending more money.

Chip Tuning

Chip tuning is used to improve the car factory ECU assembly performance.  With its help it is possible to increase engine power, improve acceleration dynamics, reduce fuel consumption, change small ECU errors.Chip installation occurs in several stages. First, the motor control program is read and changes in its codes are introduced, then the new program is entered into the ECU. It should be noted that the manufacturer does not install chip tuning because of the need to comply with strict parameters of ecology of exhaust gases.

After a certain period of time after chip tuning installation, there are problems with faulty injectors, burned out cylinder-head valves and exhaust gas recirculation, as well as melted pistons. Everyone makes their own choice to modernize their car, but you should always keep in mind the consequences for it. After all, services to install chip tuning for some reason do not provide a warranty for cars with an impressive mileage or working with a heavy load.

The efficiency of the BMW N62B48 engine is very high, allowing you to use fuel wisely and get more power than its previous counterpart. The engine is undemanding in maintenance, but stands out for its durability and economy. Perhaps the main disadvantage is only the price of the engine when replacing it. A car based on BMW N62B48 will be a successful acquisition and will serve its owner for a long time. Careful attitude and timely maintenance will help to avoid most of the problems with a comfortable car. N62 engines are recognized by motorists and experts and are valued for high resource of piston rings and nominal condition of the cylinder.

This engine is installed on the following models:

BMW 5-Series (E61)

BMW 5-Series (E60)

BMW 6-Series (E64)

BMW 6-Series (E63)

BMW 7-Series (E65)

BMW X5 (E70)

BMW X5 (E53)