Internal combustion engine – is a fairly complex unit, which consists of hundreds of different moving parts. During operation they are lapped together, the additional friction which reduces the load on them. To new engine (or after it has passed Repair) work effectively, it is necessary that the operation started with this in mind. In other words, must be met certain modes of operation for some time (or run) after the launch of the new unit. This special mode called “running”. Running is needed not only for new units. Drivers with experience say that the engine should be run in even with minimal interference in its design. For example, when replacing the camshaft or chain. In this case, long-term running is required. Usually it is enough about 500 kilometers gently. After a major overhaul of the engine running must have at least 1 500 – 2 000 km, and the replacement of the cylinder liners and piston rings – all 3000 – 4000 km. Special sparing mode of operation includes the movement at a speed not exceeding 50 km/h, smooth set engine speed and limiting the speed indicator at 2500 rev/min. With the replacement of piston rings there are certain problems associated with the fact that they are to be installed in place of piston grooves, which are already worn-sufficient. Badly broken grooves on the piston and new rings can break even at the first start after replacing the motor. As in this case to determine the degree of wear of the groove? To do this, carry out careful inspection of the old and ring in the first place – to pay attention to its bottom surface. Glossy shine with a characteristic “waviness” in the sunlight – it is the main sign that a piston must be replaced, as well as a tangible touch wear grooves. Usually the inclination of the lower surface increases. Thus, the angle of the wear ring corresponds to the angle of the old wear grooves on the piston. If such a groove to establish a new ring, it typically breaks down at the first startup. Characteristically also that only the top wear (compression) with the ring groove, so that the wear of other piston rings is almost not observed. It is necessary to consider performing run-renovated with replacement of piston rings. Many manufacturers claim that their engines, which just came off the assembly line, can be operated in an optimum operating mode. You must accept the fact that the accuracy of fit of parts of motors each other really became very high, however, does not negate the need for a fully working parts fit together. Therefore, the new engine should be avoided severe operating conditions, such as prolonged idling. This, incidentally, is mentioned in the instruction manual to almost any car model. Experts say that the resource is an internal combustion engine without a proper break-in is reduced by more than half. In addition, properly run-in power unit may lead to other problems and troubles: oil from entering the air cleaner, high fuel consumption, starting problems, etc. All of these arguments convince of the need for a number of special procedures. For example, during engine break is necessary to be sure to replace the engine oil. It is believed that the oil 10W-30 is the most suitable for this purpose. You need to change the oil every 500 km in the process of running, and at least four times overall. Use should be natural oils brand. In addition, before the first start-up, check the quality of the stitched threads, adjust the valve clearance, belt tension (chain), the timing and replace the oil filter. With the commissioning of the new power unit or motor Refurbished necessary to carry out a three-hour break in the cold, during which you can finally adjust the operation of other systems (plug and power). Naturally, in addition to changing the oil and cold running is necessary to observe some rules of the road, avoiding excessive load on the power unit. For this is necessary to avoid driving at high speed, overloading the vehicle passengers or cargo, drastically slow down, to carry out long-term movement in the lower gears. Another important condition is to respect speed limits. As mentioned above, the power saving mode is considered to be the movement of a rate not exceeding 50 km /h. Although the new engines first 300 – 400 km and can accelerate to 80 km/h. The main thing – to maximize the movement was uniform, without downshifting. In practice, it is easy to perform, make a run at night unloaded suburban highway without significant ups and downs. After the first 300 – 400 km can be gradually gaining momentum. The main thing that mode of operation close to the optimum as possible smoothly and speed remained constant as possible. After the end of the running engine must be replaced once the oil and make a full flushing the engine. You can then use the recommended brand of synthetic oils, which can not cause damage to the engine. The next oil change can be carried out after 5000 km.
A few words in relation to the running of a diesel engine.
The principle of running the diesel engine is no different from a gasoline internal combustion engine, but there are some nuances. For example, after the overhaul diesel should be run in no less than 10,000 km. It is necessary to ensure that, before moving to the engine was warmed up well, and after the trip let it run for at least thirty seconds. After the break-in is necessary to perform a complete diagnosis and maintenance of the unit. Correctly run-in motor rarely fails, and has high power and economy.