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The debut of the second generation of the 4-door coupe Mercedes-Benz CLA was held at the Consumer Electronics Show (CES) consumer electronics show in Las Vegas. With a more thorough…

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Resource of the engine of the car VAZ

Engine: what is the resource

The car accompanies many parameters, there is a maximum speed, norms on toxicity, efficiency, and, of course, each parameter has certain tolerances and methods for its measurement. Each of them, to a greater or lesser degree of complexity, can be measured and compared with baseline or regulatory indicators. Such an important parameter, as quality, and one of its most important components — a resource — should be estimated quite differently.

It is on the resource that domestic consumers pay more attention when choosing a car, its value obscures both power, and maximum speed, and equipment, not to mention the environmental safety parameters that are not in demand by our customers. When designing the first families of small cars of the Volga Automobile Plant, designers laid down a resource of 125 thousand km, with the advent of the “tenth” family, the figure of 150 thousand km appeared. It should be borne in mind that this concept is rather vague and our standards do not, unfortunately, contain clear criteria for when the limit of the technical state is reached. If we refer to the reference literature, then with respect to internal combustion engines under the resource we will see the mileage before the overhaul, that is, until the moment when it is necessary to carry out repair work related to the dismantling of the crankshaft. Repair work without removing the HF, overhaul does not apply, and, therefore, it is not the onset of the limit state, when the resource is limited. In practice, a significant reduction in power, the appearance of a non-functional knock, an abnormally high consumption of oil or fuel can be taken as the criterion of the onset of the limiting state of the engine.

Resource and kilometers

A curious dependence of the resource on the car’s mileage was revealed by the specialists of the VAZ TTR engine design department. Even during the existence of the USSR, the Volga Automobile Plant took from actual operation a certain batch of engines with very high mileage from various geographical regions of the country, from the Far East, Leningrad, Moscow, Armenia, the Urals, and Central Asia. Came across engines with runs of 400-440 thousand km. Moreover, the plant took these engines on the terms of replacement with new ones, so there was no special intent for consumers to embellish their engines. No one hid the frequency of changing oil, parts during operation. These motors are completely disassembled and defective, down to every detail. So, according to the results of this work, it turned out that the technical condition of the motor does not correlate with mileage, it is determined only by the operating conditions and quality of manufacture. Tests have shown that a normally manufactured engine in compliance with the rules of operation, with regular replacement of oils, is capable of undergoing over one hundred thousand kilometers without major repairs without major repairs. Naturally, we are not talking about cases of obvious marriage and exploitation on low-quality gasoline and oils.

The first kilometers of the engine

The instructions for the use of VAZ cars say that during the first 2,000 km it is necessary to observe certain gentle rules for loading the engine. At the same time, and at the plant itself, some specialists relate to this quite critically in the sense that it is impossible for the consumer to load such information. It can be assumed that the same Western consumer, if he had read such instructions, could decide to refuse to buy a car of this manufacturer in favor of another. Another thing is that objectively the car of the Volga Automobile Plant does not require engine run-in as part of a car, although it is still in the instructions, and no one has canceled this record. Running-in was required for running in friction pairs at a time when the technology could not ensure that the surfaces were ready to work already during manufacture. There were times when crankshafts of the first Soviet AMO F-1 automobiles were drunk with solid disc files, with the development of technology, the requirements for running-in were gradually weakened.

All 100% of engines are exposed to hot running-in (and at the factory, this means technological running-in), each engine starts up, “classic” engines are within 15 minutes, engines for front-wheel-drive cars – 6.5 minutes. The purpose of the technological run-in is not to burn in friction pairs, but to check the absence of leaks, knocks, and the performance of the necessary adjustment operations. At the same time, certain parameters are removed on front-wheel motors, which was not done on “classic” engines, including power, torque, and crankcase flow. This technology makes it possible to screen engines that have forgotten to install a piston ring, or there is a bully in one of the cylinders, information on each engine is accumulated in the computer, and at any time the relevant services can use it and trace the entire chain of motor production.

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